diff options
| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2024-04-29 15:23:25 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2024-04-29 15:23:25 +1000 |
| commit | 197f75685647db872962313662314c591cb140a1 (patch) | |
| tree | 318e118e7e40fd245fcd3687b7290a3160d2d33a | |
| parent | ffe3cea23602869aa0a7e43f1bf83435f9062e4d (diff) | |
| parent | e22810ab3f5e0de0151a5a0d05a54cfc39a780a8 (diff) | |
| download | linux-next-history-197f75685647db872962313662314c591cb140a1.tar.gz | |
Merge branch 'char-misc-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
Notice: this object is not reachable from any branch.
Notice: this object is not reachable from any branch.
141 files changed, 8934 insertions, 2425 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 2e6d5ebfd3c73d..7cee78ad410856 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -243,7 +243,8 @@ Description: less measurements. Units after application of scale and offset are milli degrees Celsius. -What: /sys/bus/iio/devices/iio:deviceX/in_tempX_input +What: /sys/bus/iio/devices/iio:deviceX/in_tempY_input +What: /sys/bus/iio/devices/iio:deviceX/in_temp_input KernelVersion: 2.6.38 Contact: linux-iio@vger.kernel.org Description: diff --git a/Documentation/ABI/testing/sysfs-bus-iio-ad9739a b/Documentation/ABI/testing/sysfs-bus-iio-ad9739a new file mode 100644 index 00000000000000..ed59299e6f8d9a --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-ad9739a @@ -0,0 +1,19 @@ +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_operating_mode +KernelVersion: 6.9 +Contact: linux-iio@vger.kernel.org +Description: + DAC operating mode. One of the following modes can be selected: + + * normal: This is DAC normal mode. + * mixed-mode: In this mode the output is effectively chopped at + the DAC sample rate. This has the effect of + reducing the power of the fundamental signal while + increasing the power of the images centered around + the DAC sample rate, thus improving the output + power of these images. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_operating_mode_available +KernelVersion: 6.9 +Contact: linux-iio@vger.kernel.org +Description: + Available operating modes. diff --git a/Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml b/Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml index 07cacc3f6a975b..280ed479ef5abc 100644 --- a/Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml +++ b/Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml @@ -32,6 +32,8 @@ properties: spi-cpol: true + spi-3wire: true + interrupts: maxItems: 1 diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml new file mode 100644 index 00000000000000..ea6cfcd0aff463 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml @@ -0,0 +1,279 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2023 Analog Devices Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ad7173.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD7173 ADC + +maintainers: + - Ceclan Dumitru <dumitru.ceclan@analog.com> + +description: | + Analog Devices AD717x ADC's: + The AD717x family offer a complete integrated Sigma-Delta ADC solution which + can be used in high precision, low noise single channel applications + (Life Science measurements) or higher speed multiplexed applications + (Factory Automation PLC Input modules). The Sigma-Delta ADC is intended + primarily for measurement of signals close to DC but also delivers + outstanding performance with input bandwidths out to ~10kHz. + + Datasheets for supported chips: + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-4.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7173-8.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-8.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7176-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7177-2.pdf + +properties: + compatible: + enum: + - adi,ad7172-2 + - adi,ad7172-4 + - adi,ad7173-8 + - adi,ad7175-2 + - adi,ad7175-8 + - adi,ad7176-2 + - adi,ad7177-2 + + reg: + maxItems: 1 + + interrupts: + minItems: 1 + items: + - description: | + Ready: multiplexed with SPI data out. While SPI CS is low, + can be used to indicate the completion of a conversion. + + - description: | + Error: The three error bits in the status register (ADC_ERROR, CRC_ERROR, + and REG_ERROR) are OR'ed, inverted, and mapped to the ERROR pin. + Therefore, the ERROR pin indicates that an error has occurred. + + interrupt-names: + minItems: 1 + items: + - const: rdy + - const: err + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + spi-max-frequency: + maximum: 20000000 + + gpio-controller: + description: Marks the device node as a GPIO controller. + + '#gpio-cells': + const: 2 + description: + The first cell is the GPIO number and the second cell specifies + GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. + + vref-supply: + description: | + Differential external reference supply used for conversion. The reference + voltage (Vref) specified here must be the voltage difference between the + REF+ and REF- pins: Vref = (REF+) - (REF-). + + vref2-supply: + description: | + Differential external reference supply used for conversion. The reference + voltage (Vref2) specified here must be the voltage difference between the + REF2+ and REF2- pins: Vref2 = (REF2+) - (REF2-). + + avdd-supply: + description: Avdd supply, can be used as reference for conversion. + This supply is referenced to AVSS, voltage specified here + represents (AVDD1 - AVSS). + + avdd2-supply: + description: Avdd2 supply, used as the input to the internal voltage regulator. + This supply is referenced to AVSS, voltage specified here + represents (AVDD2 - AVSS). + + iovdd-supply: + description: iovdd supply, used for the chip digital interface. + + clocks: + maxItems: 1 + description: | + Optional external clock source. Can include one clock source: external + clock or external crystal. + + clock-names: + enum: + - ext-clk + - xtal + + '#clock-cells': + const: 0 + +patternProperties: + "^channel@[0-9a-f]$": + type: object + $ref: adc.yaml + unevaluatedProperties: false + + properties: + reg: + minimum: 0 + maximum: 15 + + diff-channels: + items: + minimum: 0 + maximum: 31 + + adi,reference-select: + description: | + Select the reference source to use when converting on + the specific channel. Valid values are: + vref : REF+ /REF− + vref2 : REF2+ /REF2− + refout-avss: REFOUT/AVSS (Internal reference) + avdd : AVDD /AVSS + + External reference ref2 only available on ad7173-8 and ad7172-4. + Internal reference refout-avss not available on ad7172-4. + + If not specified, internal reference used (if available). + $ref: /schemas/types.yaml#/definitions/string + enum: + - vref + - vref2 + - refout-avss + - avdd + default: refout-avss + + required: + - reg + - diff-channels + +required: + - compatible + - reg + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + + # Only ad7172-4, ad7173-8 and ad7175-8 support vref2 + # Other models have [0-3] channel registers + - if: + properties: + compatible: + not: + contains: + enum: + - adi,ad7172-4 + - adi,ad7173-8 + - adi,ad7175-8 + then: + properties: + vref2-supply: false + patternProperties: + "^channel@[0-9a-f]$": + properties: + adi,reference-select: + enum: + - vref + - refout-avss + - avdd + reg: + maximum: 3 + + # Model ad7172-4 does not support internal reference + - if: + properties: + compatible: + contains: + const: adi,ad7172-4 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: + reg: + maximum: 7 + adi,reference-select: + enum: + - vref + - vref2 + - avdd + required: + - adi,reference-select + + - if: + anyOf: + - required: [clock-names] + - required: [clocks] + then: + properties: + '#clock-cells': false + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/interrupt-controller/irq.h> + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,ad7173-8"; + reg = <0>; + + #address-cells = <1>; + #size-cells = <0>; + + interrupts = <25 IRQ_TYPE_EDGE_FALLING>; + interrupt-names = "rdy"; + interrupt-parent = <&gpio>; + spi-max-frequency = <5000000>; + gpio-controller; + #gpio-cells = <2>; + #clock-cells = <0>; + + vref-supply = <&dummy_regulator>; + + channel@0 { + reg = <0>; + bipolar; + diff-channels = <0 1>; + adi,reference-select = "vref"; + }; + + channel@1 { + reg = <1>; + diff-channels = <2 3>; + }; + + channel@2 { + reg = <2>; + bipolar; + diff-channels = <4 5>; + }; + + channel@3 { + reg = <3>; + bipolar; + diff-channels = <6 7>; + }; + + channel@4 { + reg = <4>; + diff-channels = <8 9>; + adi,reference-select = "avdd"; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7944.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7944.yaml new file mode 100644 index 00000000000000..d17d184842d329 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7944.yaml @@ -0,0 +1,213 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ad7944.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices PulSAR LFCSP Analog to Digital Converters + +maintainers: + - Michael Hennerich <Michael.Hennerich@analog.com> + - Nuno Sá <nuno.sa@analog.com> + +description: | + A family of pin-compatible single channel differential analog to digital + converters with SPI support in a LFCSP package. + + * https://www.analog.com/en/products/ad7944.html + * https://www.analog.com/en/products/ad7985.html + * https://www.analog.com/en/products/ad7986.html + +$ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + enum: + - adi,ad7944 + - adi,ad7985 + - adi,ad7986 + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 111111111 + + spi-cpol: true + spi-cpha: true + + adi,spi-mode: + $ref: /schemas/types.yaml#/definitions/string + enum: [ single, chain ] + description: | + This property indicates the SPI wiring configuration. + + When this property is omitted, it is assumed that the device is using what + the datasheet calls "4-wire mode". This is the conventional SPI mode used + when there are multiple devices on the same bus. In this mode, the CNV + line is used to initiate the conversion and the SDI line is connected to + CS on the SPI controller. + + When this property is present, it indicates that the device is using one + of the following alternative wiring configurations: + + * single: The datasheet calls this "3-wire mode". (NOTE: The datasheet's + definition of 3-wire mode is NOT at all related to the standard + spi-3wire property!) This mode is often used when the ADC is the only + device on the bus. In this mode, SDI is tied to VIO, and the CNV line + can be connected to the CS line of the SPI controller or to a GPIO, in + which case the CS line of the controller is unused. + * chain: The datasheet calls this "chain mode". This mode is used to save + on wiring when multiple ADCs are used. In this mode, the SDI line of + one chip is tied to the SDO of the next chip in the chain and the SDI of + the last chip in the chain is tied to GND. Only the first chip in the + chain is connected to the SPI bus. The CNV line of all chips are tied + together. The CS line of the SPI controller can be used as the CNV line + only if it is active high. + + '#daisy-chained-devices': true + + avdd-supply: + description: A 2.5V supply that powers the analog circuitry. + + dvdd-supply: + description: A 2.5V supply that powers the digital circuitry. + + vio-supply: + description: + A 1.8V to 2.7V supply for the digital inputs and outputs. + + bvdd-supply: + description: + A voltage supply for the buffered power. When using an external reference + without an internal buffer (PDREF high, REFIN low), this should be + connected to the same supply as ref-supply. Otherwise, when using an + internal reference or an external reference with an internal buffer, this + is connected to a 5V supply. + + ref-supply: + description: + Voltage regulator for the external reference voltage (REF). This property + is omitted when using an internal reference. + + refin-supply: + description: + Voltage regulator for the reference buffer input (REFIN). When using an + external buffer with internal reference, this should be connected to a + 1.2V external reference voltage supply. Otherwise, this property is + omitted. + + cnv-gpios: + description: + The Convert Input (CNV). This input has multiple functions. It initiates + the conversions and selects the SPI mode of the device (chain or CS). In + 'single' mode, this property is omitted if the CNV pin is connected to the + CS line of the SPI controller. + maxItems: 1 + + turbo-gpios: + description: + GPIO connected to the TURBO line. If omitted, it is assumed that the TURBO + line is hard-wired and the state is determined by the adi,always-turbo + property. + maxItems: 1 + + adi,always-turbo: + type: boolean + description: + When present, this property indicates that the TURBO line is hard-wired + and the state is always high. If neither this property nor turbo-gpios is + present, the TURBO line is assumed to be hard-wired and the state is + always low. + + interrupts: + description: + The SDO pin can also function as a busy indicator. This node should be + connected to an interrupt that is triggered when the SDO line goes low + while the SDI line is high and the CNV line is low ('single' mode) or the + SDI line is low and the CNV line is high ('multi' mode); or when the SDO + line goes high while the SDI and CNV lines are high (chain mode), + maxItems: 1 + +required: + - compatible + - reg + - avdd-supply + - dvdd-supply + - vio-supply + - bvdd-supply + +allOf: + # ref-supply and refin-supply are mutually exclusive (neither is also valid) + - if: + required: + - ref-supply + then: + properties: + refin-supply: false + - if: + required: + - refin-supply + then: + properties: + ref-supply: false + # in '4-wire' mode, cnv-gpios is required, for other modes it is optional + - if: + not: + required: + - adi,spi-mode + then: + required: + - cnv-gpios + # chain mode has lower SCLK max rate and doesn't work when TURBO is enabled + - if: + required: + - adi,spi-mode + properties: + adi,spi-mode: + const: chain + then: + properties: + spi-max-frequency: + maximum: 90909090 + adi,always-turbo: false + required: + - '#daisy-chained-devices' + else: + properties: + '#daisy-chained-devices': false + # turbo-gpios and adi,always-turbo are mutually exclusive + - if: + required: + - turbo-gpios + then: + properties: + adi,always-turbo: false + - if: + required: + - adi,always-turbo + then: + properties: + turbo-gpios: false + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + spi { + #address-cells = <1>; + #size-cells = <0>; + adc@0 { + compatible = "adi,ad7944"; + reg = <0>; + spi-cpha; + spi-max-frequency = <111111111>; + avdd-supply = <&supply_2_5V>; + dvdd-supply = <&supply_2_5V>; + vio-supply = <&supply_1_8V>; + bvdd-supply = <&supply_5V>; + cnv-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>; + turbo-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>; + }; + }; diff --git a/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml index 7ef46c90ebc8ea..da605a051b9497 100644 --- a/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml @@ -11,8 +11,13 @@ maintainers: properties: compatible: - enum: - - allwinner,sun20i-d1-gpadc + oneOf: + - enum: + - allwinner,sun20i-d1-gpadc + - items: + - enum: + - allwinner,sun50i-h616-gpadc + - const: allwinner,sun20i-d1-gpadc "#io-channel-cells": const: 1 diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad9739a.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad9739a.yaml new file mode 100644 index 00000000000000..c0b36476113ac4 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/adi,ad9739a.yaml @@ -0,0 +1,95 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/dac/adi,ad9739a.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD9739A RF DAC + +maintainers: + - Dragos Bogdan <dragos.bogdan@analog.com> + - Nuno Sa <nuno.sa@analog.com> + +description: | + The AD9739A is a 14-bit, 2.5 GSPS high performance RF DACs that are capable + of synthesizing wideband signals from dc up to 3 GHz. + + https://www.analog.com/media/en/technical-documentation/data-sheets/ad9737a_9739a.pdf + +properties: + compatible: + enum: + - adi,ad9739a + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + reset-gpios: + maxItems: 1 + + interrupts: + maxItems: 1 + + vdd-3p3-supply: + description: 3.3V Digital input supply. + + vdd-supply: + description: 1.8V Digital input supply. + + vdda-supply: + description: 3.3V Analog input supply. + + vddc-supply: + description: 1.8V Clock input supply. + + vref-supply: + description: Input/Output reference supply. + + io-backends: + maxItems: 1 + + adi,full-scale-microamp: + description: This property represents the DAC full scale current. + minimum: 8580 + maximum: 31700 + default: 20000 + +required: + - compatible + - reg + - clocks + - io-backends + - vdd-3p3-supply + - vdd-supply + - vdda-supply + - vddc-supply + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + + dac@0 { + compatible = "adi,ad9739a"; + reg = <0>; + + clocks = <&dac_clk>; + + io-backends = <&iio_backend>; + + vdd-3p3-supply = <&vdd_3_3>; + vdd-supply = <&vdd>; + vdda-supply = <&vdd_3_3>; + vddc-supply = <&vdd>; + }; + }; +... diff --git a/Documentation/devicetree/bindings/iio/dac/adi,axi-dac.yaml b/Documentation/devicetree/bindings/iio/dac/adi,axi-dac.yaml new file mode 100644 index 00000000000000..a55e9bfc66d746 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/adi,axi-dac.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/dac/adi,axi-dac.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AXI DAC IP core + +maintainers: + - Nuno Sa <nuno.sa@analog.com> + +description: | + Analog Devices Generic AXI DAC IP core for interfacing a DAC device + with a high speed serial (JESD204B/C) or source synchronous parallel + interface (LVDS/CMOS). + Usually, some other interface type (i.e SPI) is used as a control + interface for the actual DAC, while this IP core will interface + to the data-lines of the DAC and handle the streaming of data from + memory via DMA into the DAC. + + https://wiki.analog.com/resources/fpga/docs/axi_dac_ip + +properties: + compatible: + enum: + - adi,axi-dac-9.1.b + + reg: + maxItems: 1 + + dmas: + maxItems: 1 + + dma-names: + items: + - const: tx + + clocks: + maxItems: 1 + + '#io-backend-cells': + const: 0 + +required: + - compatible + - dmas + - reg + - clocks + +additionalProperties: false + +examples: + - | + dac@44a00000 { + compatible = "adi,axi-dac-9.1.b"; + reg = <0x44a00000 0x10000>; + dmas = <&tx_dma 0>; + dma-names = "tx"; + #io-backend-cells = <0>; + clocks = <&axi_clk>; + }; +... diff --git a/Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml b/Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml index 79da0323c327ee..e59db861e2eb10 100644 --- a/Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml +++ b/Documentation/devicetree/bindings/iio/dac/ti,dac5571.yaml @@ -21,6 +21,7 @@ properties: - ti,dac5573 - ti,dac6573 - ti,dac7573 + - ti,dac081c081 - ti,dac121c081 reg: diff --git a/Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml b/Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml index eed0df9d3a2322..205d352ab46727 100644 --- a/Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml +++ b/Documentation/devicetree/bindings/iio/health/maxim,max30102.yaml @@ -4,16 +4,20 @@ $id: http://devicetree.org/schemas/iio/health/maxim,max30102.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# -title: Maxim MAX30102 heart rate and pulse oximeter and MAX30105 particle-sensor +title: Maxim MAX30101/2 heart rate and pulse oximeter and MAX30105 particle-sensor maintainers: - Matt Ranostay <matt.ranostay@konsulko.com> properties: compatible: - enum: - - maxim,max30102 - - maxim,max30105 + oneOf: + - enum: + - maxim,max30102 + - maxim,max30105 + - items: + - const: maxim,max30101 + - const: maxim,max30105 reg: maxItems: 1 diff --git a/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml b/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml index 8b5dedd1a598cf..b375d307513fec 100644 --- a/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml +++ b/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml @@ -34,6 +34,9 @@ properties: reg: maxItems: 1 + reset-gpios: + maxItems: 1 + required: - compatible - reg @@ -43,6 +46,7 @@ additionalProperties: false examples: - | + #include <dt-bindings/gpio/gpio.h> #include <dt-bindings/interrupt-controller/irq.h> i2c { #address-cells = <1>; @@ -54,5 +58,6 @@ examples: vdd-supply = <&vcc_3v3>; interrupt-parent = <&gpio3>; interrupts = <23 IRQ_TYPE_EDGE_RISING>; + reset-gpios = <&gpio3 27 GPIO_ACTIVE_LOW>; }; }; diff --git a/Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml b/Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml index 7cd05bcbee317c..5e0bed2c45ded3 100644 --- a/Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml +++ b/Documentation/devicetree/bindings/iio/imu/invensense,icm42600.yaml @@ -32,6 +32,7 @@ properties: - invensense,icm42605 - invensense,icm42622 - invensense,icm42631 + - invensense,icm42688 reg: maxItems: 1 diff --git a/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml b/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml index 297b8a1a7ffbca..587ff2bced2ddd 100644 --- a/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml +++ b/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml @@ -62,14 +62,15 @@ properties: allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# - if: - not: - properties: - compatible: - contains: - enum: - - invensense,mpu9150 - - invensense,mpu9250 - - invensense,mpu9255 + properties: + compatible: + contains: + enum: + - invensense,iam20680 + - invensense,icm20602 + - invensense,icm20608 + - invensense,icm20609 + - invensense,icm20689 then: properties: i2c-gate: false diff --git a/Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml b/Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml index 206af44f2c4333..b750096530bc63 100644 --- a/Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml +++ b/Documentation/devicetree/bindings/iio/light/avago,apds9300.yaml @@ -4,17 +4,22 @@ $id: http://devicetree.org/schemas/iio/light/avago,apds9300.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# -title: Avago APDS9300 ambient light sensor +title: Avago Gesture/RGB/ALS/Proximity sensors maintainers: - - Jonathan Cameron <jic23@kernel.org> + - Subhajit Ghosh <subhajit.ghosh@tweaklogic.com> description: | - Datasheet at https://www.avagotech.com/docs/AV02-1077EN + Datasheet: https://www.avagotech.com/docs/AV02-1077EN + Datasheet: https://www.avagotech.com/docs/AV02-4191EN + Datasheet: https://www.avagotech.com/docs/AV02-4755EN properties: compatible: - const: avago,apds9300 + enum: + - avago,apds9300 + - avago,apds9306 + - avago,apds9960 reg: maxItems: 1 @@ -22,6 +27,8 @@ properties: interrupts: maxItems: 1 + vdd-supply: true + additionalProperties: false required: @@ -30,6 +37,8 @@ required: examples: - | + #include <dt-bindings/interrupt-controller/irq.h> + i2c { #address-cells = <1>; #size-cells = <0>; @@ -38,7 +47,8 @@ examples: compatible = "avago,apds9300"; reg = <0x39>; interrupt-parent = <&gpio2>; - interrupts = <29 8>; + interrupts = <29 IRQ_TYPE_LEVEL_LOW>; + vdd-supply = <®ulator_3v3>; }; }; ... diff --git a/Documentation/devicetree/bindings/iio/light/avago,apds9960.yaml b/Documentation/devicetree/bindings/iio/light/avago,apds9960.yaml deleted file mode 100644 index f06e0fda56299a..00000000000000 --- a/Documentation/devicetree/bindings/iio/light/avago,apds9960.yaml +++ /dev/null @@ -1,44 +0,0 @@ -# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) -%YAML 1.2 ---- -$id: http://devicetree.org/schemas/iio/light/avago,apds9960.yaml# -$schema: http://devicetree.org/meta-schemas/core.yaml# - -title: Avago APDS9960 gesture/RGB/ALS/proximity sensor - -maintainers: - - Matt Ranostay <matt.ranostay@konsulko.com> - -description: | - Datasheet at https://www.avagotech.com/docs/AV02-4191EN - -properties: - compatible: - const: avago,apds9960 - - reg: - maxItems: 1 - - interrupts: - maxItems: 1 - -additionalProperties: false - -required: - - compatible - - reg - -examples: - - | - i2c { - #address-cells = <1>; - #size-cells = <0>; - - light-sensor@39 { - compatible = "avago,apds9960"; - reg = <0x39>; - interrupt-parent = <&gpio1>; - interrupts = <16 1>; - }; - }; -... diff --git a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml index dbb85135fd6688..312febeeb3bba8 100644 --- a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml +++ b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml @@ -57,6 +57,8 @@ properties: interrupts: maxItems: 1 + vdd-supply: true + adi,mux-delay-config-us: description: | Extra delay prior to each conversion, in addition to the internal 1ms @@ -460,6 +462,7 @@ required: - compatible - reg - interrupts + - vdd-supply additionalProperties: false @@ -489,6 +492,7 @@ examples: #address-cells = <1>; #size-cells = <0>; + vdd-supply = <&supply>; interrupts = <20 IRQ_TYPE_EDGE_RISING>; interrupt-parent = <&gpio>; diff --git a/Documentation/iio/ad7944.rst b/Documentation/iio/ad7944.rst new file mode 100644 index 00000000000000..f418ab1288ae35 --- /dev/null +++ b/Documentation/iio/ad7944.rst @@ -0,0 +1,130 @@ +.. SPDX-License-Identifier: GPL-2.0-only + +============= +AD7944 driver +============= + +ADC driver for Analog Devices Inc. AD7944 and similar devices. The module name +is ``ad7944``. + + +Supported devices +================= + +The following chips are supported by this driver: + +* `AD7944 <https://www.analog.com/AD7944>`_ +* `AD7985 <https://www.analog.com/AD7985>`_ +* `AD7986 <https://www.analog.com/AD7986>`_ + + +Supported features +================== + +SPI wiring modes +---------------- + +The driver currently supports two of the many possible SPI wiring configurations. + +CS mode, 3-wire, without busy indicator +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +.. code-block:: + + +-------------+ + +--------------------| CS | + v | | + VIO +--------------------+ | HOST | + | | CNV | | | + +--->| SDI AD7944 SDO |-------->| SDI | + | SCK | | | + +--------------------+ | | + ^ | | + +--------------------| SCLK | + +-------------+ + +To select this mode in the device tree, set the ``adi,spi-mode`` property to +``"single"`` and omit the ``cnv-gpios`` property. + +CS mode, 4-wire, without busy indicator +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +.. code-block:: + + +-------------+ + +-----------------------------------| CS | + | | | + | +--------------------| GPIO | + | v | | + | +--------------------+ | HOST | + | | CNV | | | + +--->| SDI AD7944 SDO |-------->| SDI | + | SCK | | | + +--------------------+ | | + ^ | | + +--------------------| SCLK | + +-------------+ + +To select this mode in the device tree, omit the ``adi,spi-mode`` property and +provide the ``cnv-gpios`` property. + +Reference voltage +----------------- + +All 3 possible reference voltage sources are supported: + +- Internal reference +- External 1.2V reference and internal buffer +- External reference + +The source is determined by the device tree. If ``ref-supply`` is present, then +the external reference is used. If ``refin-supply`` is present, then the internal +buffer is used. If neither is present, then the internal reference is used. + +Unimplemented features +---------------------- + +- ``BUSY`` indication +- ``TURBO`` mode +- Daisy chain mode + + +Device attributes +================= + +There are two types of ADCs in this family, pseudo-differential and fully +differential. The channel name is different depending on the type of ADC. + +Pseudo-differential ADCs +------------------------ + +AD7944 and AD7985 are pseudo-differential ADCs and have the following attributes: + ++---------------------------------------+--------------------------------------------------------------+ +| Attribute | Description | ++=======================================+==============================================================+ +| ``in_voltage0_raw`` | Raw ADC voltage value (*IN+* referenced to ground sense). | ++---------------------------------------+--------------------------------------------------------------+ +| ``in_voltage0_scale`` | Scale factor to convert raw value to mV. | ++---------------------------------------+--------------------------------------------------------------+ + +Fully-differential ADCs +----------------------- + +AD7986 is a fully-differential ADC and has the following attributes: + ++---------------------------------------+--------------------------------------------------------------+ +| Attribute | Description | ++=======================================+==============================================================+ +| ``in_voltage0-voltage1_raw`` | Raw ADC voltage value (*IN+* - *IN-*). | ++---------------------------------------+--------------------------------------------------------------+ +| ``in_voltage0-voltage1_scale`` | Scale factor to convert raw value to mV. | ++---------------------------------------+--------------------------------------------------------------+ + + +Device buffers +============== + +This driver supports IIO triggered buffers. + +See :doc:`iio_devbuf` for more information. diff --git a/Documentation/iio/index.rst b/Documentation/iio/index.rst index 30b09eefe75edf..fb6f9d7432116e 100644 --- a/Documentation/iio/index.rst +++ b/Documentation/iio/index.rst @@ -16,6 +16,7 @@ Industrial I/O Kernel Drivers .. toctree:: :maxdepth: 1 + ad7944 adis16475 bno055 ep93xx_adc diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst index c472423412bf27..a141e8e65c5d3a 100644 --- a/Documentation/userspace-api/ioctl/ioctl-number.rst +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst @@ -174,6 +174,8 @@ Code Seq# Include File Comments 'M' 00-0F drivers/video/fsl-diu-fb.h conflict! 'N' 00-1F drivers/usb/scanner.h 'N' 40-7F drivers/block/nvme.c +'N' 80-8F uapi/linux/ntsync.h NT synchronization primitives + <mailto:wine-devel@winehq.org> 'O' 00-06 mtd/ubi-user.h UBI 'P' all linux/soundcard.h conflict! 'P' 60-6F sound/sscape_ioctl.h conflict! diff --git a/MAINTAINERS b/MAINTAINERS index 6d22a60318ed6f..de42cb690160f5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -210,44 +210,44 @@ S: Maintained F: drivers/hwmon/abituguru3.c ACCES 104-DIO-48E GPIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-104-dio-48e.c ACCES 104-IDI-48 GPIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-104-idi-48.c ACCES 104-IDIO-16 GPIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-104-idio-16.c ACCES 104-QUAD-8 DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-iio@vger.kernel.org S: Maintained F: drivers/counter/104-quad-8.c ACCES IDIO-16 GPIO LIBRARY -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-idio-16.c F: drivers/gpio/gpio-idio-16.h ACCES PCI-IDIO-16 GPIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-pci-idio-16.c ACCES PCIe-IDIO-24 GPIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-pcie-idio-24.c @@ -453,6 +453,16 @@ W: http://wiki.analog.com/AD7879 W: https://ez.analog.com/linux-software-drivers F: drivers/input/touchscreen/ad7879.c +AD7944 ADC DRIVER (AD7944/AD7985/AD7986) +M: Michael Hennerich <michael.hennerich@analog.com> +M: Nuno Sá <nuno.sa@analog.com> +R: David Lechner <dlechner@baylibre.com> +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/iio/adc/adi,ad7944.yaml +F: Documentation/iio/ad7944.rst +F: drivers/iio/adc/ad7944.c + ADAFRUIT MINI I2C GAMEPAD M: Anshul Dalal <anshulusr@gmail.com> L: linux-input@vger.kernel.org @@ -1243,6 +1253,15 @@ W: https://ez.analog.com/linux-software-drivers F: Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml F: drivers/iio/adc/ad7780.c +ANALOG DEVICES INC AD9739a DRIVER +M: Nuno Sa <nuno.sa@analog.com> +M: Dragos Bogdan <dragos.bogdan@analog.com> +L: linux-iio@vger.kernel.org +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/iio/dac/adi,ad9739a.yaml +F: drivers/iio/dac/ad9739a.c + ANALOG DEVICES INC ADA4250 DRIVER M: Antoniu Miclaus <antoniu.miclaus@analog.com> L: linux-iio@vger.kernel.org @@ -1408,6 +1427,14 @@ F: sound/soc/codecs/adav* F: sound/soc/codecs/sigmadsp.* F: sound/soc/codecs/ssm* +ANALOG DEVICES INC AXI DAC DRIVER +M: Nuno Sa <nuno.sa@analog.com> +L: linux-iio@vger.kernel.org +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/iio/dac/adi,axi-dac.yaml +F: drivers/iio/dac/adi-axi-dac.c + ANALOG DEVICES INC DMA DRIVERS M: Lars-Peter Clausen <lars@metafoo.de> S: Supported @@ -1472,7 +1499,7 @@ S: Maintained F: sound/aoa/ APEX EMBEDDED SYSTEMS STX104 IIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-iio@vger.kernel.org S: Maintained F: drivers/iio/addac/stx104.c @@ -5549,7 +5576,7 @@ F: Documentation/hwmon/corsair-psu.rst F: drivers/hwmon/corsair-psu.c COUNTER SUBSYSTEM -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-iio@vger.kernel.org S: Maintained T: git git://git.kernel.org/pub/scm/linux/kernel/git/wbg/counter.git @@ -6337,7 +6364,7 @@ F: include/sound/da[79]*.h F: sound/soc/codecs/da[79]*.[ch] DIAMOND SYSTEMS GPIO-MM GPIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-gpio-mm.c @@ -10647,6 +10674,7 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git F: Documentation/ABI/testing/configfs-iio* F: Documentation/ABI/testing/sysfs-bus-iio* F: Documentation/devicetree/bindings/iio/ +F: Documentation/iio/ F: drivers/iio/ F: drivers/staging/iio/ F: include/dt-bindings/iio/ @@ -10854,14 +10882,14 @@ S: Maintained F: drivers/video/fbdev/i810/ INTEL 8254 COUNTER DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-iio@vger.kernel.org S: Maintained F: drivers/counter/i8254.c F: include/linux/i8254.h INTEL 8255 GPIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-i8255.c @@ -11564,7 +11592,7 @@ F: drivers/irqchip/ F: include/linux/irqchip.h ISA -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> S: Maintained F: Documentation/driver-api/isa.rst F: drivers/base/isa.c @@ -13597,7 +13625,7 @@ F: drivers/net/mdio/mdio-regmap.c F: include/linux/mdio/mdio-regmap.h MEASUREMENT COMPUTING CIO-DAC IIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-iio@vger.kernel.org S: Maintained F: drivers/iio/dac/cio-dac.c @@ -24089,7 +24117,7 @@ S: Orphan F: drivers/watchdog/ebc-c384_wdt.c WINSYSTEMS WS16C48 GPIO DRIVER -M: William Breathitt Gray <william.gray@linaro.org> +M: William Breathitt Gray <wbg@kernel.org> L: linux-gpio@vger.kernel.org S: Maintained F: drivers/gpio/gpio-ws16c48.c diff --git a/drivers/accessibility/speakup/devsynth.c b/drivers/accessibility/speakup/devsynth.c index cb7e1114e8ebe2..e3d909bd048048 100644 --- a/drivers/accessibility/speakup/devsynth.c +++ b/drivers/accessibility/speakup/devsynth.c @@ -39,13 +39,13 @@ static ssize_t speakup_file_write(struct file *fp, const char __user *buffer, static ssize_t speakup_file_writeu(struct file *fp, const char __user *buffer, size_t nbytes, loff_t *ppos) { - size_t count = nbytes, want; + size_t count = nbytes, consumed, want; const char __user *ptr = buffer; size_t bytes; unsigned long flags; unsigned char buf[256]; u16 ubuf[256]; - size_t in, in2, out; + size_t in, out; if (!synth) return -ENODEV; @@ -58,57 +58,24 @@ static ssize_t speakup_file_writeu(struct file *fp, const char __user *buffer, return -EFAULT; /* Convert to u16 */ - for (in = 0, out = 0; in < bytes; in++) { - unsigned char c = buf[in]; - int nbytes = 8 - fls(c ^ 0xff); - u32 value; - - switch (nbytes) { - case 8: /* 0xff */ - case 7: /* 0xfe */ - case 1: /* 0x80 */ - /* Invalid, drop */ - goto drop; - - case 0: - /* ASCII, copy */ - ubuf[out++] = c; - continue; + for (in = 0, out = 0; in < bytes; in += consumed) { + s32 value; - default: - /* 2..6-byte UTF-8 */ + value = synth_utf8_get(buf + in, bytes - in, &consumed, &want); + if (value == -1) { + /* Invalid or incomplete */ - if (bytes - in < nbytes) { + if (want > bytes - in) /* We don't have it all yet, stop here * and wait for the rest */ bytes = in; - want = nbytes; - continue; - } - - /* First byte */ - value = c & ((1u << (7 - nbytes)) - 1); - - /* Other bytes */ - for (in2 = 2; in2 <= nbytes; in2++) { - c = buf[in + 1]; - if ((c & 0xc0) != 0x80) { - /* Invalid, drop the head */ - want = 1; - goto drop; - } - value = (value << 6) | (c & 0x3f); - in++; - } - - if (value < 0x10000) - ubuf[out++] = value; - want = 1; - break; + + continue; } -drop: - /* empty statement */; + + if (value < 0x10000) + ubuf[out++] = value; } count -= bytes; diff --git a/drivers/accessibility/speakup/speakup.h b/drivers/accessibility/speakup/speakup.h index 364fde99749ed1..54f1226ea06191 100644 --- a/drivers/accessibility/speakup/speakup.h +++ b/drivers/accessibility/speakup/speakup.h @@ -76,7 +76,9 @@ int speakup_paste_selection(struct tty_struct *tty); void speakup_cancel_paste(void); void speakup_register_devsynth(void); void speakup_unregister_devsynth(void); +s32 synth_utf8_get(const char *buf, size_t count, size_t *consumed, size_t *want); void synth_write(const char *buf, size_t count); +void synth_writeu(const char *buf, size_t count); int synth_supports_indexing(void); extern struct vc_data *spk_sel_cons; diff --git a/drivers/accessibility/speakup/synth.c b/drivers/accessibility/speakup/synth.c index 45f90610313382..85062e605d796d 100644 --- a/drivers/accessibility/speakup/synth.c +++ b/drivers/accessibility/speakup/synth.c @@ -217,10 +217,95 @@ void synth_write(const char *_buf, size_t count) synth_start(); } +/* Consume one utf-8 character from buf (that contains up to count bytes), + * returns the unicode codepoint if valid, -1 otherwise. + * In all cases, returns the number of consumed bytes in *consumed, + * and the minimum number of bytes that would be needed for the next character + * in *want. + */ +s32 synth_utf8_get(const char *buf, size_t count, size_t *consumed, size_t *want) +{ + unsigned char c = buf[0]; + int nbytes = 8 - fls(c ^ 0xff); + u32 value; + size_t i; + + switch (nbytes) { + case 8: /* 0xff */ + case 7: /* 0xfe */ + case 1: /* 0x80 */ + /* Invalid, drop */ + *consumed = 1; + *want = 1; + return -1; + + case 0: + /* ASCII, take as such */ + *consumed = 1; + *want = 1; + return c; + + default: + /* 2..6-byte UTF-8 */ + + if (count < nbytes) { + /* We don't have it all */ + *consumed = 0; + *want = nbytes; + return -1; + } + + /* First byte */ + value = c & ((1u << (7 - nbytes)) - 1); + + /* Other bytes */ + for (i = 1; i < nbytes; i++) { + c = buf[i]; + if ((c & 0xc0) != 0x80) { + /* Invalid, drop the head */ + *consumed = i; + *want = 1; + return -1; + } + value = (value << 6) | (c & 0x3f); + } + + *consumed = nbytes; + *want = 1; + return value; + } +} + +void synth_writeu(const char *buf, size_t count) +{ + size_t i, consumed, want; + + /* Convert to u16 */ + for (i = 0; i < count; i++) { + s32 value; + + value = synth_utf8_get(buf + i, count - i, &consumed, &want); + if (value == -1) { + /* Invalid or incomplete */ + + if (want > count - i) + /* We don't have it all, stop */ + count = i; + + continue; + } + + if (value < 0x10000) + synth_buffer_add(value); + } + + synth_start(); +} + void synth_printf(const char *fmt, ...) { va_list args; - unsigned char buf[160], *p; + unsigned char buf[160]; int r; va_start(args, fmt); @@ -229,10 +314,7 @@ void synth_printf(const char *fmt, ...) if (r > sizeof(buf) - 1) r = sizeof(buf) - 1; - p = buf; - while (r--) - synth_buffer_add(*p++); - synth_start(); + synth_writeu(buf, r); } EXPORT_SYMBOL_GPL(synth_printf); diff --git a/drivers/base/property.c b/drivers/base/property.c index 7324a704a9a118..6a3a434d0d6f42 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -869,20 +869,6 @@ struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode) EXPORT_SYMBOL_GPL(fwnode_handle_get); /** - * fwnode_handle_put - Drop reference to a device node - * @fwnode: Pointer to the device node to drop the reference to. - * - * This has to be used when terminating device_for_each_child_node() iteration - * with break or return to prevent stale device node references from being left - * behind. - */ -void fwnode_handle_put(struct fwnode_handle *fwnode) -{ - fwnode_call_void_op(fwnode, put); -} -EXPORT_SYMBOL_GPL(fwnode_handle_put); - -/** * fwnode_device_is_available - check if a device is available for use * @fwnode: Pointer to the fwnode of the device. * diff --git a/drivers/cdx/controller/cdx_controller.c b/drivers/cdx/controller/cdx_controller.c index 112a1541de6d7e..201f9a6fbde702 100644 --- a/drivers/cdx/controller/cdx_controller.c +++ b/drivers/cdx/controller/cdx_controller.c @@ -222,7 +222,7 @@ mcdi_init_fail: return ret; } -static int xlnx_cdx_remove(struct platform_device *pdev) +static void xlnx_cdx_remove(struct platform_device *pdev) { struct cdx_controller *cdx = platform_get_drvdata(pdev); struct cdx_mcdi *cdx_mcdi = cdx->priv; @@ -234,8 +234,6 @@ static int xlnx_cdx_remove(struct platform_device *pdev) cdx_mcdi_finish(cdx_mcdi); kfree(cdx_mcdi); - - return 0; } static const struct of_device_id cdx_match_table[] = { @@ -252,7 +250,7 @@ static struct platform_driver cdx_pdriver = { .of_match_table = cdx_match_table, }, .probe = xlnx_cdx_probe, - .remove = xlnx_cdx_remove, + .remove_new = xlnx_cdx_remove, }; static int __init cdx_controller_init(void) diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 9b80e622ae80a8..7c359cc406d5bc 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -383,6 +383,7 @@ static int mmap_mem(struct file *file, struct vm_area_struct *vma) return 0; } +#ifdef CONFIG_DEVPORT static ssize_t read_port(struct file *file, char __user *buf, size_t count, loff_t *ppos) { @@ -424,6 +425,7 @@ static ssize_t write_port(struct file *file, const char __user *buf, *ppos = i; return tmp-buf; } +#endif static ssize_t read_null(struct file *file, char __user *buf, size_t count, loff_t *ppos) @@ -653,12 +655,14 @@ static const struct file_operations null_fops = { .uring_cmd = uring_cmd_null, }; -static const struct file_operations __maybe_unused port_fops = { +#ifdef CONFIG_DEVPORT +static const struct file_operations port_fops = { .llseek = memory_lseek, .read = read_port, .write = write_port, .open = open_port, }; +#endif static const struct file_operations zero_fops = { .llseek = zero_lseek, diff --git a/drivers/char/powernv-op-panel.c b/drivers/char/powernv-op-panel.c index 3c99696b145ee6..f2cff1a6fed520 100644 --- a/drivers/char/powernv-op-panel.c +++ b/drivers/char/powernv-op-panel.c @@ -195,12 +195,11 @@ free_oppanel_data: return rc; } -static int oppanel_remove(struct platform_device *pdev) +static void oppanel_remove(struct platform_device *pdev) { misc_deregister(&oppanel_dev); kfree(oppanel_lines); kfree(oppanel_data); - return 0; } static const struct of_device_id oppanel_match[] = { @@ -214,7 +213,7 @@ static struct platform_driver oppanel_driver = { .of_match_table = oppanel_match, }, .probe = oppanel_probe, - .remove = oppanel_remove, + .remove_new = oppanel_remove, }; module_platform_driver(oppanel_driver); diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c index 22d249333f530f..bb5115b1736a46 100644 --- a/drivers/char/sonypi.c +++ b/drivers/char/sonypi.c @@ -1408,7 +1408,7 @@ static int sonypi_probe(struct platform_device *dev) return error; } -static int sonypi_remove(struct platform_device *dev) +static void sonypi_remove(struct platform_device *dev) { sonypi_disable(); @@ -1432,8 +1432,6 @@ static int sonypi_remove(struct platform_device *dev) } kfifo_free(&sonypi_device.fifo); - - return 0; } #ifdef CONFIG_PM_SLEEP @@ -1470,7 +1468,7 @@ static struct platform_driver sonypi_driver = { .pm = SONYPI_PM, }, .probe = sonypi_probe, - .remove = sonypi_remove, + .remove_new = sonypi_remove, .shutdown = sonypi_shutdown, }; diff --git a/drivers/comedi/drivers/cb_pcidas64.c b/drivers/comedi/drivers/cb_pcidas64.c index ff19fc3859e47b..d398c6df948229 100644 --- a/drivers/comedi/drivers/cb_pcidas64.c +++ b/drivers/comedi/drivers/cb_pcidas64.c @@ -374,11 +374,6 @@ static inline u16 pipe_full_bits(u16 hw_status_bits) return (hw_status_bits >> 10) & 0x3; }; -static inline unsigned int dma_chain_flag_bits(u16 prepost_bits) -{ - return (prepost_bits >> 6) & 0x3; -} - static inline unsigned int adc_upper_read_ptr_code(u16 prepost_bits) { return (prepost_bits >> 12) & 0x3; diff --git a/drivers/counter/counter-core.c b/drivers/counter/counter-core.c index 3f24481fc04a12..893b4f0726d2e6 100644 --- a/drivers/counter/counter-core.c +++ b/drivers/counter/counter-core.c @@ -49,12 +49,12 @@ static void counter_device_release(struct device *dev) kfree(container_of(counter, struct counter_device_allochelper, counter)); } -static struct device_type counter_device_type = { +static const struct device_type counter_device_type = { .name = "counter_device", .release = counter_device_release, }; -static struct bus_type counter_bus_type = { +static const struct bus_type counter_bus_type = { .name = "counter", .dev_name = "counter", }; diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c index 6206d2dc3d4709..0664ef969f797c 100644 --- a/drivers/counter/stm32-timer-cnt.c +++ b/drivers/counter/stm32-timer-cnt.c @@ -8,9 +8,11 @@ * */ #include <linux/counter.h> +#include <linux/interrupt.h> #include <linux/mfd/stm32-timers.h> #include <linux/mod_devicetable.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> #include <linux/types.h> @@ -21,6 +23,12 @@ #define TIM_CCER_MASK (TIM_CCER_CC1P | TIM_CCER_CC1NP | \ TIM_CCER_CC2P | TIM_CCER_CC2NP) +#define STM32_CH1_SIG 0 +#define STM32_CH2_SIG 1 +#define STM32_CLOCK_SIG 2 +#define STM32_CH3_SIG 3 +#define STM32_CH4_SIG 4 + struct stm32_timer_regs { u32 cr1; u32 cnt; @@ -34,6 +42,11 @@ struct stm32_timer_cnt { u32 max_arr; bool enabled; struct stm32_timer_regs bak; + bool has_encoder; + unsigned int nchannels; + unsigned int nr_irqs; + spinlock_t lock; /* protects nb_ovf */ + u64 nb_ovf; }; static const enum counter_function stm32_count_functions[] = { @@ -107,12 +120,18 @@ static int stm32_count_function_write(struct counter_device *counter, sms = TIM_SMCR_SMS_SLAVE_MODE_DISABLED; break; case COUNTER_FUNCTION_QUADRATURE_X2_A: + if (!priv->has_encoder) + return -EOPNOTSUPP; sms = TIM_SMCR_SMS_ENCODER_MODE_1; break; case COUNTER_FUNCTION_QUADRATURE_X2_B: + if (!priv->has_encoder) + return -EOPNOTSUPP; sms = TIM_SMCR_SMS_ENCODER_MODE_2; break; case COUNTER_FUNCTION_QUADRATURE_X4: + if (!priv->has_encoder) + return -EOPNOTSUPP; sms = TIM_SMCR_SMS_ENCODER_MODE_3; break; default: @@ -216,11 +235,108 @@ static int stm32_count_enable_write(struct counter_device *counter, return 0; } +static int stm32_count_prescaler_read(struct counter_device *counter, + struct counter_count *count, u64 *prescaler) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + u32 psc; + + regmap_read(priv->regmap, TIM_PSC, &psc); + + *prescaler = psc + 1; + + return 0; +} + +static int stm32_count_prescaler_write(struct counter_device *counter, + struct counter_count *count, u64 prescaler) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + u32 psc; + + if (!prescaler || prescaler > MAX_TIM_PSC + 1) + return -ERANGE; + + psc = prescaler - 1; + + return regmap_write(priv->regmap, TIM_PSC, psc); +} + +static int stm32_count_cap_read(struct counter_device *counter, + struct counter_count *count, + size_t ch, u64 *cap) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + u32 ccrx; + + if (ch >= priv->nchannels) + return -EOPNOTSUPP; + + switch (ch) { + case 0: + regmap_read(priv->regmap, TIM_CCR1, &ccrx); + break; + case 1: + regmap_read(priv->regmap, TIM_CCR2, &ccrx); + break; + case 2: + regmap_read(priv->regmap, TIM_CCR3, &ccrx); + break; + case 3: + regmap_read(priv->regmap, TIM_CCR4, &ccrx); + break; + default: + return -EINVAL; + } + + dev_dbg(counter->parent, "CCR%zu: 0x%08x\n", ch + 1, ccrx); + + *cap = ccrx; + + return 0; +} + +static int stm32_count_nb_ovf_read(struct counter_device *counter, + struct counter_count *count, u64 *val) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + unsigned long irqflags; + + spin_lock_irqsave(&priv->lock, irqflags); + *val = priv->nb_ovf; + spin_unlock_irqrestore(&priv->lock, irqflags); + + return 0; +} + +static int stm32_count_nb_ovf_write(struct counter_device *counter, + struct counter_count *count, u64 val) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + unsigned long irqflags; + + spin_lock_irqsave(&priv->lock, irqflags); + priv->nb_ovf = val; + spin_unlock_irqrestore(&priv->lock, irqflags); + + return 0; +} + +static DEFINE_COUNTER_ARRAY_CAPTURE(stm32_count_cap_array, 4); + static struct counter_comp stm32_count_ext[] = { COUNTER_COMP_DIRECTION(stm32_count_direction_read), COUNTER_COMP_ENABLE(stm32_count_enable_read, stm32_count_enable_write), COUNTER_COMP_CEILING(stm32_count_ceiling_read, stm32_count_ceiling_write), + COUNTER_COMP_COUNT_U64("prescaler", stm32_count_prescaler_read, + stm32_count_prescaler_write), + COUNTER_COMP_ARRAY_CAPTURE(stm32_count_cap_read, NULL, stm32_count_cap_array), + COUNTER_COMP_COUNT_U64("num_overflows", stm32_count_nb_ovf_read, stm32_count_nb_ovf_write), +}; + +static const enum counter_synapse_action stm32_clock_synapse_actions[] = { + COUNTER_SYNAPSE_ACTION_RISING_EDGE, }; static const enum counter_synapse_action stm32_synapse_actions[] = { @@ -243,25 +359,152 @@ static int stm32_action_read(struct counter_device *counter, switch (function) { case COUNTER_FUNCTION_INCREASE: /* counts on internal clock when CEN=1 */ - *action = COUNTER_SYNAPSE_ACTION_NONE; + if (synapse->signal->id == STM32_CLOCK_SIG) + *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE; + else + *action = COUNTER_SYNAPSE_ACTION_NONE; return 0; case COUNTER_FUNCTION_QUADRATURE_X2_A: /* counts up/down on TI1FP1 edge depending on TI2FP2 level */ - if (synapse->signal->id == count->synapses[0].signal->id) + if (synapse->signal->id == STM32_CH1_SIG) *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; else *action = COUNTER_SYNAPSE_ACTION_NONE; return 0; case COUNTER_FUNCTION_QUADRATURE_X2_B: /* counts up/down on TI2FP2 edge depending on TI1FP1 level */ - if (synapse->signal->id == count->synapses[1].signal->id) + if (synapse->signal->id == STM32_CH2_SIG) *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; else *action = COUNTER_SYNAPSE_ACTION_NONE; return 0; case COUNTER_FUNCTION_QUADRATURE_X4: /* counts up/down on both TI1FP1 and TI2FP2 edges */ - *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; + if (synapse->signal->id == STM32_CH1_SIG || synapse->signal->id == STM32_CH2_SIG) + *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES; + else + *action = COUNTER_SYNAPSE_ACTION_NONE; + return 0; + default: + return -EINVAL; + } +} + +struct stm32_count_cc_regs { + u32 ccmr_reg; + u32 ccmr_mask; + u32 ccmr_bits; + u32 ccer_bits; +}; + +static const struct stm32_count_cc_regs stm32_cc[] = { + { TIM_CCMR1, TIM_CCMR_CC1S, TIM_CCMR_CC1S_TI1, + TIM_CCER_CC1E | TIM_CCER_CC1P | TIM_CCER_CC1NP }, + { TIM_CCMR1, TIM_CCMR_CC2S, TIM_CCMR_CC2S_TI2, + TIM_CCER_CC2E | TIM_CCER_CC2P | TIM_CCER_CC2NP }, + { TIM_CCMR2, TIM_CCMR_CC3S, TIM_CCMR_CC3S_TI3, + TIM_CCER_CC3E | TIM_CCER_CC3P | TIM_CCER_CC3NP }, + { TIM_CCMR2, TIM_CCMR_CC4S, TIM_CCMR_CC4S_TI4, + TIM_CCER_CC4E | TIM_CCER_CC4P | TIM_CCER_CC4NP }, +}; + +static int stm32_count_capture_configure(struct counter_device *counter, unsigned int ch, + bool enable) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + const struct stm32_count_cc_regs *cc; + u32 ccmr, ccer; + + if (ch >= ARRAY_SIZE(stm32_cc) || ch >= priv->nchannels) { + dev_err(counter->parent, "invalid ch: %d\n", ch); + return -EINVAL; + } + + cc = &stm32_cc[ch]; + + /* + * configure channel in input capture mode, map channel 1 on TI1, channel2 on TI2... + * Select both edges / non-inverted to trigger a capture. + */ + if (enable) { + /* first clear possibly latched capture flag upon enabling */ + if (!regmap_test_bits(priv->regmap, TIM_CCER, cc->ccer_bits)) + regmap_write(priv->regmap, TIM_SR, ~TIM_SR_CC_IF(ch)); + regmap_update_bits(priv->regmap, cc->ccmr_reg, cc->ccmr_mask, + cc->ccmr_bits); + regmap_set_bits(priv->regmap, TIM_CCER, cc->ccer_bits); + } else { + regmap_clear_bits(priv->regmap, TIM_CCER, cc->ccer_bits); + regmap_clear_bits(priv->regmap, cc->ccmr_reg, cc->ccmr_mask); + } + + regmap_read(priv->regmap, cc->ccmr_reg, &ccmr); + regmap_read(priv->regmap, TIM_CCER, &ccer); + dev_dbg(counter->parent, "%s(%s) ch%d 0x%08x 0x%08x\n", __func__, enable ? "ena" : "dis", + ch, ccmr, ccer); + + return 0; +} + +static int stm32_count_events_configure(struct counter_device *counter) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + struct counter_event_node *event_node; + u32 dier = 0; + int i, ret; + + list_for_each_entry(event_node, &counter->events_list, l) { + switch (event_node->event) { + case COUNTER_EVENT_OVERFLOW_UNDERFLOW: + /* first clear possibly latched UIF before enabling */ + if (!regmap_test_bits(priv->regmap, TIM_DIER, TIM_DIER_UIE)) + regmap_write(priv->regmap, TIM_SR, (u32)~TIM_SR_UIF); + dier |= TIM_DIER_UIE; + break; + case COUNTER_EVENT_CAPTURE: + ret = stm32_count_capture_configure(counter, event_node->channel, true); + if (ret) + return ret; + dier |= TIM_DIER_CC_IE(event_node->channel); + break; + default: + /* should never reach this path */ + return -EINVAL; + } + } + + /* Enable / disable all events at once, from events_list, so write all DIER bits */ + regmap_write(priv->regmap, TIM_DIER, dier); + + /* check for disabled capture events */ + for (i = 0 ; i < priv->nchannels; i++) { + if (!(dier & TIM_DIER_CC_IE(i))) { + ret = stm32_count_capture_configure(counter, i, false); + if (ret) + return ret; + } + } + + return 0; +} + +static int stm32_count_watch_validate(struct counter_device *counter, + const struct counter_watch *watch) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + + /* Interrupts are optional */ + if (!priv->nr_irqs) + return -EOPNOTSUPP; + + switch (watch->event) { + case COUNTER_EVENT_CAPTURE: + if (watch->channel >= priv->nchannels) { + dev_err(counter->parent, "Invalid channel %d\n", watch->channel); + return -EINVAL; + } + return 0; + case COUNTER_EVENT_OVERFLOW_UNDERFLOW: return 0; default: return -EINVAL; @@ -274,35 +517,89 @@ static const struct counter_ops stm32_timer_cnt_ops = { .function_read = stm32_count_function_read, .function_write = stm32_count_function_write, .action_read = stm32_action_read, + .events_configure = stm32_count_events_configure, + .watch_validate = stm32_count_watch_validate, +}; + +static int stm32_count_clk_get_freq(struct counter_device *counter, + struct counter_signal *signal, u64 *freq) +{ + struct stm32_timer_cnt *const priv = counter_priv(counter); + + *freq = clk_get_rate(priv->clk); + + return 0; +} + +static struct counter_comp stm32_count_clock_ext[] = { + COUNTER_COMP_FREQUENCY(stm32_count_clk_get_freq), }; static struct counter_signal stm32_signals[] = { + /* + * Need to declare all the signals as a static array, and keep the signals order here, + * even if they're unused or unexisting on some timer instances. It's an abstraction, + * e.g. high level view of the counter features. + * + * Userspace programs may rely on signal0 to be "Channel 1", signal1 to be "Channel 2", + * and so on. When a signal is unexisting, the COUNTER_SYNAPSE_ACTION_NONE can be used, + * to indicate that a signal doesn't affect the counter. + */ { - .id = 0, - .name = "Channel 1 Quadrature A" + .id = STM32_CH1_SIG, + .name = "Channel 1" }, { - .id = 1, - .name = "Channel 1 Quadrature B" - } + .id = STM32_CH2_SIG, + .name = "Channel 2" + }, + { + .id = STM32_CLOCK_SIG, + .name = "Clock", + .ext = stm32_count_clock_ext, + .num_ext = ARRAY_SIZE(stm32_count_clock_ext), + }, + { + .id = STM32_CH3_SIG, + .name = "Channel 3" + }, + { + .id = STM32_CH4_SIG, + .name = "Channel 4" + }, }; static struct counter_synapse stm32_count_synapses[] = { { .actions_list = stm32_synapse_actions, .num_actions = ARRAY_SIZE(stm32_synapse_actions), - .signal = &stm32_signals[0] + .signal = &stm32_signals[STM32_CH1_SIG] }, { .actions_list = stm32_synapse_actions, .num_actions = ARRAY_SIZE(stm32_synapse_actions), - .signal = &stm32_signals[1] - } + .signal = &stm32_signals[STM32_CH2_SIG] + }, + { + .actions_list = stm32_clock_synapse_actions, + .num_actions = ARRAY_SIZE(stm32_clock_synapse_actions), + .signal = &stm32_signals[STM32_CLOCK_SIG] + }, + { + .actions_list = stm32_synapse_actions, + .num_actions = ARRAY_SIZE(stm32_synapse_actions), + .signal = &stm32_signals[STM32_CH3_SIG] + }, + { + .actions_list = stm32_synapse_actions, + .num_actions = ARRAY_SIZE(stm32_synapse_actions), + .signal = &stm32_signals[STM32_CH4_SIG] + }, }; static struct counter_count stm32_counts = { .id = 0, - .name = "Channel 1 Count", + .name = "STM32 Timer Counter", .functions_list = stm32_count_functions, .num_functions = ARRAY_SIZE(stm32_count_functions), .synapses = stm32_count_synapses, @@ -311,13 +608,111 @@ static struct counter_count stm32_counts = { .num_ext = ARRAY_SIZE(stm32_count_ext) }; +static irqreturn_t stm32_timer_cnt_isr(int irq, void *ptr) +{ + struct counter_device *counter = ptr; + struct stm32_timer_cnt *const priv = counter_priv(counter); + u32 clr = GENMASK(31, 0); /* SR flags can be cleared by writing 0 (wr 1 has no effect) */ + u32 sr, dier; + int i; + + regmap_read(priv->regmap, TIM_SR, &sr); + regmap_read(priv->regmap, TIM_DIER, &dier); + /* + * Some status bits in SR don't match with the enable bits in DIER. Only take care of + * the possibly enabled bits in DIER (that matches in between SR and DIER). + */ + dier &= (TIM_DIER_UIE | TIM_DIER_CC1IE | TIM_DIER_CC2IE | TIM_DIER_CC3IE | TIM_DIER_CC4IE); + sr &= dier; + + if (sr & TIM_SR_UIF) { + spin_lock(&priv->lock); + priv->nb_ovf++; + spin_unlock(&priv->lock); + counter_push_event(counter, COUNTER_EVENT_OVERFLOW_UNDERFLOW, 0); + dev_dbg(counter->parent, "COUNTER_EVENT_OVERFLOW_UNDERFLOW\n"); + /* SR flags can be cleared by writing 0, only clear relevant flag */ + clr &= ~TIM_SR_UIF; + } + + /* Check capture events */ + for (i = 0 ; i < priv->nchannels; i++) { + if (sr & TIM_SR_CC_IF(i)) { + counter_push_event(counter, COUNTER_EVENT_CAPTURE, i); + clr &= ~TIM_SR_CC_IF(i); + dev_dbg(counter->parent, "COUNTER_EVENT_CAPTURE, %d\n", i); + } + } + + regmap_write(priv->regmap, TIM_SR, clr); + + return IRQ_HANDLED; +}; + +static void stm32_timer_cnt_detect_channels(struct device *dev, + struct stm32_timer_cnt *priv) +{ + u32 ccer, ccer_backup; + + regmap_read(priv->regmap, TIM_CCER, &ccer_backup); + regmap_set_bits(priv->regmap, TIM_CCER, TIM_CCER_CCXE); + regmap_read(priv->regmap, TIM_CCER, &ccer); + regmap_write(priv->regmap, TIM_CCER, ccer_backup); + priv->nchannels = hweight32(ccer & TIM_CCER_CCXE); + + dev_dbg(dev, "has %d cc channels\n", priv->nchannels); +} + +/* encoder supported on TIM1 TIM2 TIM3 TIM4 TIM5 TIM8 */ +#define STM32_TIM_ENCODER_SUPPORTED (BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(7)) + +static const char * const stm32_timer_trigger_compat[] = { + "st,stm32-timer-trigger", + "st,stm32h7-timer-trigger", +}; + +static int stm32_timer_cnt_probe_encoder(struct device *dev, + struct stm32_timer_cnt *priv) +{ + struct device *parent = dev->parent; + struct device_node *tnode = NULL, *pnode = parent->of_node; + int i, ret; + u32 idx; + + /* + * Need to retrieve the trigger node index from DT, to be able + * to determine if the counter supports encoder mode. It also + * enforce backward compatibility, and allow to support other + * counter modes in this driver (when the timer doesn't support + * encoder). + */ + for (i = 0; i < ARRAY_SIZE(stm32_timer_trigger_compat) && !tnode; i++) + tnode = of_get_compatible_child(pnode, stm32_timer_trigger_compat[i]); + if (!tnode) { + dev_err(dev, "Can't find trigger node\n"); + return -ENODATA; + } + + ret = of_property_read_u32(tnode, "reg", &idx); + if (ret) { + dev_err(dev, "Can't get index (%d)\n", ret); + return ret; + } + + priv->has_encoder = !!(STM32_TIM_ENCODER_SUPPORTED & BIT(idx)); + + dev_dbg(dev, "encoder support: %s\n", priv->has_encoder ? "yes" : "no"); + + return 0; +} + static int stm32_timer_cnt_probe(struct platform_device *pdev) { struct stm32_timers *ddata = dev_get_drvdata(pdev->dev.parent); struct device *dev = &pdev->dev; struct stm32_timer_cnt *priv; struct counter_device *counter; - int ret; + int i, ret; if (IS_ERR_OR_NULL(ddata)) return -EINVAL; @@ -331,6 +726,13 @@ static int stm32_timer_cnt_probe(struct platform_device *pdev) priv->regmap = ddata->regmap; priv->clk = ddata->clk; priv->max_arr = ddata->max_arr; + priv->nr_irqs = ddata->nr_irqs; + + ret = stm32_timer_cnt_probe_encoder(dev, priv); + if (ret) + return ret; + + stm32_timer_cnt_detect_channels(dev, priv); counter->name = dev_name(dev); counter->parent = dev; @@ -340,8 +742,39 @@ static int stm32_timer_cnt_probe(struct platform_device *pdev) counter->signals = stm32_signals; counter->num_signals = ARRAY_SIZE(stm32_signals); + spin_lock_init(&priv->lock); + platform_set_drvdata(pdev, priv); + /* STM32 Timers can have either 1 global, or 4 dedicated interrupts (optional) */ + if (priv->nr_irqs == 1) { + /* All events reported through the global interrupt */ + ret = devm_request_irq(&pdev->dev, ddata->irq[0], stm32_timer_cnt_isr, + 0, dev_name(dev), counter); + if (ret) { + dev_err(dev, "Failed to request irq %d (err %d)\n", + ddata->irq[0], ret); + return ret; + } + } else { + for (i = 0; i < priv->nr_irqs; i++) { + /* + * Only take care of update IRQ for overflow events, and cc for + * capture events. + */ + if (i != STM32_TIMERS_IRQ_UP && i != STM32_TIMERS_IRQ_CC) + continue; + + ret = devm_request_irq(&pdev->dev, ddata->irq[i], stm32_timer_cnt_isr, + 0, dev_name(dev), counter); + if (ret) { + dev_err(dev, "Failed to request irq %d (err %d)\n", + ddata->irq[i], ret); + return ret; + } + } + } + /* Reset input selector to its default input */ regmap_write(priv->regmap, TIM_TISEL, 0x0); diff --git a/drivers/counter/ti-ecap-capture.c b/drivers/counter/ti-ecap-capture.c index fb1cb1774674a5..675447315cafb8 100644 --- a/drivers/counter/ti-ecap-capture.c +++ b/drivers/counter/ti-ecap-capture.c @@ -369,7 +369,7 @@ static const enum counter_synapse_action ecap_cnt_input_actions[] = { }; static struct counter_comp ecap_cnt_clock_ext[] = { - COUNTER_COMP_SIGNAL_U64("frequency", ecap_cnt_clk_get_freq, NULL), + COUNTER_COMP_FREQUENCY(ecap_cnt_clk_get_freq), }; static const enum counter_signal_polarity ecap_cnt_pol_avail[] = { @@ -537,15 +537,13 @@ static int ecap_cnt_probe(struct platform_device *pdev) return 0; } -static int ecap_cnt_remove(struct platform_device *pdev) +static void ecap_cnt_remove(struct platform_device *pdev) { struct counter_device *counter_dev = platform_get_drvdata(pdev); struct ecap_cnt_dev *ecap_dev = counter_priv(counter_dev); if (ecap_dev->enabled) ecap_cnt_capture_disable(counter_dev); - - return 0; } static int ecap_cnt_suspend(struct device *dev) @@ -600,7 +598,7 @@ MODULE_DEVICE_TABLE(of, ecap_cnt_of_match); static struct platform_driver ecap_cnt_driver = { .probe = ecap_cnt_probe, - .remove = ecap_cnt_remove, + .remove_new = ecap_cnt_remove, .driver = { .name = "ecap-capture", .of_match_table = ecap_cnt_of_match, diff --git a/drivers/counter/ti-eqep.c b/drivers/counter/ti-eqep.c index b0f24cf3e891de..072b11fd6b32e8 100644 --- a/drivers/counter/ti-eqep.c +++ b/drivers/counter/ti-eqep.c @@ -425,7 +425,7 @@ static int ti_eqep_probe(struct platform_device *pdev) return 0; } -static int ti_eqep_remove(struct platform_device *pdev) +static void ti_eqep_remove(struct platform_device *pdev) { struct counter_device *counter = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; @@ -433,8 +433,6 @@ static int ti_eqep_remove(struct platform_device *pdev) counter_unregister(counter); pm_runtime_put_sync(dev); pm_runtime_disable(dev); - - return 0; } static const struct of_device_id ti_eqep_of_match[] = { @@ -445,7 +443,7 @@ MODULE_DEVICE_TABLE(of, ti_eqep_of_match); static struct platform_driver ti_eqep_driver = { .probe = ti_eqep_probe, - .remove = ti_eqep_remove, + .remove_new = ti_eqep_remove, .driver = { .name = "ti-eqep-cnt", .of_match_table = ti_eqep_of_match, diff --git a/drivers/hv/Makefile b/drivers/hv/Makefile index d76df5c8c2a916..b992c0ed182bdd 100644 --- a/drivers/hv/Makefile +++ b/drivers/hv/Makefile @@ -10,7 +10,7 @@ hv_vmbus-y := vmbus_drv.o \ hv.o connection.o channel.o \ channel_mgmt.o ring_buffer.o hv_trace.o hv_vmbus-$(CONFIG_HYPERV_TESTING) += hv_debugfs.o -hv_utils-y := hv_util.o hv_kvp.o hv_snapshot.o hv_fcopy.o hv_utils_transport.o +hv_utils-y := hv_util.o hv_kvp.o hv_snapshot.o hv_utils_transport.o # Code that must be built-in obj-$(subst m,y,$(CONFIG_HYPERV)) += hv_common.o diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 2f4d09ce027a3f..3c6011a48dabe7 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -120,7 +120,9 @@ const struct vmbus_device vmbus_devs[] = { }, /* File copy */ - { .dev_type = HV_FCOPY, + /* fcopy always uses 16KB ring buffer size and is working well for last many years */ + { .pref_ring_size = 0x4000, + .dev_type = HV_FCOPY, HV_FCOPY_GUID, .perf_device = false, .allowed_in_isolated = false, @@ -140,12 +142,19 @@ const struct vmbus_device vmbus_devs[] = { .allowed_in_isolated = false, }, - /* Unknown GUID */ - { .dev_type = HV_UNKNOWN, + /* + * Unknown GUID + * 64 KB ring buffer + 4 KB header should be sufficient size for any Hyper-V device apart + * from HV_NIC and HV_SCSI. This case avoid the fallback for unknown devices to allocate + * much bigger (2 MB) of ring size. + */ + { .pref_ring_size = 0x11000, + .dev_type = HV_UNKNOWN, .perf_device = false, .allowed_in_isolated = false, }, }; +EXPORT_SYMBOL_GPL(vmbus_devs); static const struct { guid_t guid; diff --git a/drivers/hv/hv_fcopy.c b/drivers/hv/hv_fcopy.c deleted file mode 100644 index 922d83eb7ddfac..00000000000000 --- a/drivers/hv/hv_fcopy.c +++ /dev/null @@ -1,427 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * An implementation of file copy service. - * - * Copyright (C) 2014, Microsoft, Inc. - * - * Author : K. Y. Srinivasan <ksrinivasan@novell.com> - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/nls.h> -#include <linux/workqueue.h> -#include <linux/hyperv.h> -#include <linux/sched.h> -#include <asm/hyperv-tlfs.h> - -#include "hyperv_vmbus.h" -#include "hv_utils_transport.h" - -#define WIN8_SRV_MAJOR 1 -#define WIN8_SRV_MINOR 1 -#define WIN8_SRV_VERSION (WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR) - -#define FCOPY_VER_COUNT 1 -static const int fcopy_versions[] = { - WIN8_SRV_VERSION -}; - -#define FW_VER_COUNT 1 -static const int fw_versions[] = { - UTIL_FW_VERSION -}; - -/* - * Global state maintained for transaction that is being processed. - * For a class of integration services, including the "file copy service", - * the specified protocol is a "request/response" protocol which means that - * there can only be single outstanding transaction from the host at any - * given point in time. We use this to simplify memory management in this - * driver - we cache and process only one message at a time. - * - * While the request/response protocol is guaranteed by the host, we further - * ensure this by serializing packet processing in this driver - we do not - * read additional packets from the VMBUs until the current packet is fully - * handled. - */ - -static struct { - int state; /* hvutil_device_state */ - int recv_len; /* number of bytes received. */ - struct hv_fcopy_hdr *fcopy_msg; /* current message */ - struct vmbus_channel *recv_channel; /* chn we got the request */ - u64 recv_req_id; /* request ID. */ -} fcopy_transaction; - -static void fcopy_respond_to_host(int error); -static void fcopy_send_data(struct work_struct *dummy); -static void fcopy_timeout_func(struct work_struct *dummy); -static DECLARE_DELAYED_WORK(fcopy_timeout_work, fcopy_timeout_func); -static DECLARE_WORK(fcopy_send_work, fcopy_send_data); -static const char fcopy_devname[] = "vmbus/hv_fcopy"; -static u8 *recv_buffer; -static struct hvutil_transport *hvt; -/* - * This state maintains the version number registered by the daemon. - */ -static int dm_reg_value; - -static void fcopy_poll_wrapper(void *channel) -{ - /* Transaction is finished, reset the state here to avoid races. */ - fcopy_transaction.state = HVUTIL_READY; - tasklet_schedule(&((struct vmbus_channel *)channel)->callback_event); -} - -static void fcopy_timeout_func(struct work_struct *dummy) -{ - /* - * If the timer fires, the user-mode component has not responded; - * process the pending transaction. - */ - fcopy_respond_to_host(HV_E_FAIL); - hv_poll_channel(fcopy_transaction.recv_channel, fcopy_poll_wrapper); -} - -static void fcopy_register_done(void) -{ - pr_debug("FCP: userspace daemon registered\n"); - hv_poll_channel(fcopy_transaction.recv_channel, fcopy_poll_wrapper); -} - -static int fcopy_handle_handshake(u32 version) -{ - u32 our_ver = FCOPY_CURRENT_VERSION; - - switch (version) { - case FCOPY_VERSION_0: - /* Daemon doesn't expect us to reply */ - dm_reg_value = version; - break; - case FCOPY_VERSION_1: - /* Daemon expects us to reply with our own version */ - if (hvutil_transport_send(hvt, &our_ver, sizeof(our_ver), - fcopy_register_done)) - return -EFAULT; - dm_reg_value = version; - break; - default: - /* - * For now we will fail the registration. - * If and when we have multiple versions to - * deal with, we will be backward compatible. - * We will add this code when needed. - */ - return -EINVAL; - } - pr_debug("FCP: userspace daemon ver. %d connected\n", version); - return 0; -} - -static void fcopy_send_data(struct work_struct *dummy) -{ - struct hv_start_fcopy *smsg_out = NULL; - int operation = fcopy_transaction.fcopy_msg->operation; - struct hv_start_fcopy *smsg_in; - void *out_src; - int rc, out_len; - - /* - * The strings sent from the host are encoded in - * utf16; convert it to utf8 strings. - * The host assures us that the utf16 strings will not exceed - * the max lengths specified. We will however, reserve room - * for the string terminating character - in the utf16s_utf8s() - * function we limit the size of the buffer where the converted - * string is placed to W_MAX_PATH -1 to guarantee - * that the strings can be properly terminated! - */ - - switch (operation) { - case START_FILE_COPY: - out_len = sizeof(struct hv_start_fcopy); - smsg_out = kzalloc(sizeof(*smsg_out), GFP_KERNEL); - if (!smsg_out) - return; - - smsg_out->hdr.operation = operation; - smsg_in = (struct hv_start_fcopy *)fcopy_transaction.fcopy_msg; - - utf16s_to_utf8s((wchar_t *)smsg_in->file_name, W_MAX_PATH, - UTF16_LITTLE_ENDIAN, - (__u8 *)&smsg_out->file_name, W_MAX_PATH - 1); - - utf16s_to_utf8s((wchar_t *)smsg_in->path_name, W_MAX_PATH, - UTF16_LITTLE_ENDIAN, - (__u8 *)&smsg_out->path_name, W_MAX_PATH - 1); - - smsg_out->copy_flags = smsg_in->copy_flags; - smsg_out->file_size = smsg_in->file_size; - out_src = smsg_out; - break; - - case WRITE_TO_FILE: - out_src = fcopy_transaction.fcopy_msg; - out_len = sizeof(struct hv_do_fcopy); - break; - default: - out_src = fcopy_transaction.fcopy_msg; - out_len = fcopy_transaction.recv_len; - break; - } - - fcopy_transaction.state = HVUTIL_USERSPACE_REQ; - rc = hvutil_transport_send(hvt, out_src, out_len, NULL); - if (rc) { - pr_debug("FCP: failed to communicate to the daemon: %d\n", rc); - if (cancel_delayed_work_sync(&fcopy_timeout_work)) { - fcopy_respond_to_host(HV_E_FAIL); - fcopy_transaction.state = HVUTIL_READY; - } - } - kfree(smsg_out); -} - -/* - * Send a response back to the host. - */ - -static void -fcopy_respond_to_host(int error) -{ - struct icmsg_hdr *icmsghdr; - u32 buf_len; - struct vmbus_channel *channel; - u64 req_id; - - /* - * Copy the global state for completing the transaction. Note that - * only one transaction can be active at a time. This is guaranteed - * by the file copy protocol implemented by the host. Furthermore, - * the "transaction active" state we maintain ensures that there can - * only be one active transaction at a time. - */ - - buf_len = fcopy_transaction.recv_len; - channel = fcopy_transaction.recv_channel; - req_id = fcopy_transaction.recv_req_id; - - icmsghdr = (struct icmsg_hdr *) - &recv_buffer[sizeof(struct vmbuspipe_hdr)]; - - if (channel->onchannel_callback == NULL) - /* - * We have raced with util driver being unloaded; - * silently return. - */ - return; - - icmsghdr->status = error; - icmsghdr->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; - vmbus_sendpacket(channel, recv_buffer, buf_len, req_id, - VM_PKT_DATA_INBAND, 0); -} - -void hv_fcopy_onchannelcallback(void *context) -{ - struct vmbus_channel *channel = context; - u32 recvlen; - u64 requestid; - struct hv_fcopy_hdr *fcopy_msg; - struct icmsg_hdr *icmsghdr; - int fcopy_srv_version; - - if (fcopy_transaction.state > HVUTIL_READY) - return; - - if (vmbus_recvpacket(channel, recv_buffer, HV_HYP_PAGE_SIZE * 2, &recvlen, &requestid)) { - pr_err_ratelimited("Fcopy request received. Could not read into recv buf\n"); - return; - } - - if (!recvlen) - return; - - /* Ensure recvlen is big enough to read header data */ - if (recvlen < ICMSG_HDR) { - pr_err_ratelimited("Fcopy request received. Packet length too small: %d\n", - recvlen); - return; - } - - icmsghdr = (struct icmsg_hdr *)&recv_buffer[ - sizeof(struct vmbuspipe_hdr)]; - - if (icmsghdr->icmsgtype == ICMSGTYPE_NEGOTIATE) { - if (vmbus_prep_negotiate_resp(icmsghdr, - recv_buffer, recvlen, - fw_versions, FW_VER_COUNT, - fcopy_versions, FCOPY_VER_COUNT, - NULL, &fcopy_srv_version)) { - - pr_info("FCopy IC version %d.%d\n", - fcopy_srv_version >> 16, - fcopy_srv_version & 0xFFFF); - } - } else if (icmsghdr->icmsgtype == ICMSGTYPE_FCOPY) { - /* Ensure recvlen is big enough to contain hv_fcopy_hdr */ - if (recvlen < ICMSG_HDR + sizeof(struct hv_fcopy_hdr)) { - pr_err_ratelimited("Invalid Fcopy hdr. Packet length too small: %u\n", - recvlen); - return; - } - fcopy_msg = (struct hv_fcopy_hdr *)&recv_buffer[ICMSG_HDR]; - - /* - * Stash away this global state for completing the - * transaction; note transactions are serialized. - */ - - fcopy_transaction.recv_len = recvlen; - fcopy_transaction.recv_req_id = requestid; - fcopy_transaction.fcopy_msg = fcopy_msg; - - if (fcopy_transaction.state < HVUTIL_READY) { - /* Userspace is not registered yet */ - fcopy_respond_to_host(HV_E_FAIL); - return; - } - fcopy_transaction.state = HVUTIL_HOSTMSG_RECEIVED; - - /* - * Send the information to the user-level daemon. - */ - schedule_work(&fcopy_send_work); - schedule_delayed_work(&fcopy_timeout_work, - HV_UTIL_TIMEOUT * HZ); - return; - } else { - pr_err_ratelimited("Fcopy request received. Invalid msg type: %d\n", - icmsghdr->icmsgtype); - return; - } - icmsghdr->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; - vmbus_sendpacket(channel, recv_buffer, recvlen, requestid, - VM_PKT_DATA_INBAND, 0); -} - -/* Callback when data is received from userspace */ -static int fcopy_on_msg(void *msg, int len) -{ - int *val = (int *)msg; - - if (len != sizeof(int)) - return -EINVAL; - - if (fcopy_transaction.state == HVUTIL_DEVICE_INIT) - return fcopy_handle_handshake(*val); - - if (fcopy_transaction.state != HVUTIL_USERSPACE_REQ) - return -EINVAL; - - /* - * Complete the transaction by forwarding the result - * to the host. But first, cancel the timeout. - */ - if (cancel_delayed_work_sync(&fcopy_timeout_work)) { - fcopy_transaction.state = HVUTIL_USERSPACE_RECV; - fcopy_respond_to_host(*val); - hv_poll_channel(fcopy_transaction.recv_channel, - fcopy_poll_wrapper); - } - - return 0; -} - -static void fcopy_on_reset(void) -{ - /* - * The daemon has exited; reset the state. - */ - fcopy_transaction.state = HVUTIL_DEVICE_INIT; - - if (cancel_delayed_work_sync(&fcopy_timeout_work)) - fcopy_respond_to_host(HV_E_FAIL); -} - -int hv_fcopy_init(struct hv_util_service *srv) -{ - recv_buffer = srv->recv_buffer; - fcopy_transaction.recv_channel = srv->channel; - fcopy_transaction.recv_channel->max_pkt_size = HV_HYP_PAGE_SIZE * 2; - - /* - * When this driver loads, the user level daemon that - * processes the host requests may not yet be running. - * Defer processing channel callbacks until the daemon - * has registered. - */ - fcopy_transaction.state = HVUTIL_DEVICE_INIT; - - hvt = hvutil_transport_init(fcopy_devname, 0, 0, - fcopy_on_msg, fcopy_on_reset); - if (!hvt) - return -EFAULT; - - return 0; -} - -static void hv_fcopy_cancel_work(void) -{ - cancel_delayed_work_sync(&fcopy_timeout_work); - cancel_work_sync(&fcopy_send_work); -} - -int hv_fcopy_pre_suspend(void) -{ - struct vmbus_channel *channel = fcopy_transaction.recv_channel; - struct hv_fcopy_hdr *fcopy_msg; - - /* - * Fake a CANCEL_FCOPY message for the user space daemon in case the - * daemon is in the middle of copying some file. It doesn't matter if - * there is already a message pending to be delivered to the user - * space since we force fcopy_transaction.state to be HVUTIL_READY, so - * the user space daemon's write() will fail with EINVAL (see - * fcopy_on_msg()), and the daemon will reset the device by closing - * and re-opening it. - */ - fcopy_msg = kzalloc(sizeof(*fcopy_msg), GFP_KERNEL); - if (!fcopy_msg) - return -ENOMEM; - - tasklet_disable(&channel->callback_event); - - fcopy_msg->operation = CANCEL_FCOPY; - - hv_fcopy_cancel_work(); - - /* We don't care about the return value. */ - hvutil_transport_send(hvt, fcopy_msg, sizeof(*fcopy_msg), NULL); - - kfree(fcopy_msg); - - fcopy_transaction.state = HVUTIL_READY; - - /* tasklet_enable() will be called in hv_fcopy_pre_resume(). */ - return 0; -} - -int hv_fcopy_pre_resume(void) -{ - struct vmbus_channel *channel = fcopy_transaction.recv_channel; - - tasklet_enable(&channel->callback_event); - - return 0; -} - -void hv_fcopy_deinit(void) -{ - fcopy_transaction.state = HVUTIL_DEVICE_DYING; - - hv_fcopy_cancel_work(); - - hvutil_transport_destroy(hvt); -} diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c index 9c97c4065fe736..c4f525325790fa 100644 --- a/drivers/hv/hv_util.c +++ b/drivers/hv/hv_util.c @@ -154,14 +154,6 @@ static struct hv_util_service util_vss = { .util_deinit = hv_vss_deinit, }; -static struct hv_util_service util_fcopy = { - .util_cb = hv_fcopy_onchannelcallback, - .util_init = hv_fcopy_init, - .util_pre_suspend = hv_fcopy_pre_suspend, - .util_pre_resume = hv_fcopy_pre_resume, - .util_deinit = hv_fcopy_deinit, -}; - static void perform_shutdown(struct work_struct *dummy) { orderly_poweroff(true); @@ -700,10 +692,6 @@ static const struct hv_vmbus_device_id id_table[] = { { HV_VSS_GUID, .driver_data = (unsigned long)&util_vss }, - /* File copy GUID */ - { HV_FCOPY_GUID, - .driver_data = (unsigned long)&util_fcopy - }, { }, }; diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index f6b1e710f80551..76ac5185a01a88 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -417,6 +417,11 @@ static inline bool hv_is_perf_channel(struct vmbus_channel *channel) return vmbus_devs[channel->device_id].perf_device; } +static inline size_t hv_dev_ring_size(struct vmbus_channel *channel) +{ + return vmbus_devs[channel->device_id].pref_ring_size; +} + static inline bool hv_is_allocated_cpu(unsigned int cpu) { struct vmbus_channel *channel, *sc; diff --git a/drivers/iio/accel/adxl345.h b/drivers/iio/accel/adxl345.h index 284bd387ce69b0..3d5c8719db3d78 100644 --- a/drivers/iio/accel/adxl345.h +++ b/drivers/iio/accel/adxl345.h @@ -8,6 +8,39 @@ #ifndef _ADXL345_H_ #define _ADXL345_H_ +#define ADXL345_REG_DEVID 0x00 +#define ADXL345_REG_OFSX 0x1E +#define ADXL345_REG_OFSY 0x1F +#define ADXL345_REG_OFSZ 0x20 +#define ADXL345_REG_OFS_AXIS(index) (ADXL345_REG_OFSX + (index)) +#define ADXL345_REG_BW_RATE 0x2C +#define ADXL345_REG_POWER_CTL 0x2D +#define ADXL345_REG_DATA_FORMAT 0x31 +#define ADXL345_REG_DATAX0 0x32 +#define ADXL345_REG_DATAY0 0x34 +#define ADXL345_REG_DATAZ0 0x36 +#define ADXL345_REG_DATA_AXIS(index) \ + (ADXL345_REG_DATAX0 + (index) * sizeof(__le16)) + +#define ADXL345_BW_RATE GENMASK(3, 0) +#define ADXL345_BASE_RATE_NANO_HZ 97656250LL + +#define ADXL345_POWER_CTL_MEASURE BIT(3) +#define ADXL345_POWER_CTL_STANDBY 0x00 + +#define ADXL345_DATA_FORMAT_RANGE GENMASK(1, 0) /* Set the g range */ +#define ADXL345_DATA_FORMAT_JUSTIFY BIT(2) /* Left-justified (MSB) mode */ +#define ADXL345_DATA_FORMAT_FULL_RES BIT(3) /* Up to 13-bits resolution */ +#define ADXL345_DATA_FORMAT_SPI_3WIRE BIT(6) /* 3-wire SPI mode */ +#define ADXL345_DATA_FORMAT_SELF_TEST BIT(7) /* Enable a self test */ + +#define ADXL345_DATA_FORMAT_2G 0 +#define ADXL345_DATA_FORMAT_4G 1 +#define ADXL345_DATA_FORMAT_8G 2 +#define ADXL345_DATA_FORMAT_16G 3 + +#define ADXL345_DEVID 0xE5 + /* * In full-resolution mode, scale factor is maintained at ~4 mg/LSB * in all g ranges. @@ -28,6 +61,7 @@ struct adxl345_chip_info { int uscale; }; -int adxl345_core_probe(struct device *dev, struct regmap *regmap); +int adxl345_core_probe(struct device *dev, struct regmap *regmap, + int (*setup)(struct device*, struct regmap*)); #endif /* _ADXL345_H_ */ diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c index 8bd30a23ed3b64..006ce66c0aa388 100644 --- a/drivers/iio/accel/adxl345_core.c +++ b/drivers/iio/accel/adxl345_core.c @@ -17,38 +17,9 @@ #include "adxl345.h" -#define ADXL345_REG_DEVID 0x00 -#define ADXL345_REG_OFSX 0x1e -#define ADXL345_REG_OFSY 0x1f -#define ADXL345_REG_OFSZ 0x20 -#define ADXL345_REG_OFS_AXIS(index) (ADXL345_REG_OFSX + (index)) -#define ADXL345_REG_BW_RATE 0x2C -#define ADXL345_REG_POWER_CTL 0x2D -#define ADXL345_REG_DATA_FORMAT 0x31 -#define ADXL345_REG_DATAX0 0x32 -#define ADXL345_REG_DATAY0 0x34 -#define ADXL345_REG_DATAZ0 0x36 -#define ADXL345_REG_DATA_AXIS(index) \ - (ADXL345_REG_DATAX0 + (index) * sizeof(__le16)) - -#define ADXL345_BW_RATE GENMASK(3, 0) -#define ADXL345_BASE_RATE_NANO_HZ 97656250LL - -#define ADXL345_POWER_CTL_MEASURE BIT(3) -#define ADXL345_POWER_CTL_STANDBY 0x00 - -#define ADXL345_DATA_FORMAT_FULL_RES BIT(3) /* Up to 13-bits resolution */ -#define ADXL345_DATA_FORMAT_2G 0 -#define ADXL345_DATA_FORMAT_4G 1 -#define ADXL345_DATA_FORMAT_8G 2 -#define ADXL345_DATA_FORMAT_16G 3 - -#define ADXL345_DEVID 0xE5 - struct adxl345_data { const struct adxl345_chip_info *info; struct regmap *regmap; - u8 data_range; }; #define ADXL345_CHANNEL(index, axis) { \ @@ -197,44 +168,75 @@ static void adxl345_powerdown(void *regmap) regmap_write(regmap, ADXL345_REG_POWER_CTL, ADXL345_POWER_CTL_STANDBY); } -int adxl345_core_probe(struct device *dev, struct regmap *regmap) +/** + * adxl345_core_probe() - probe and setup for the adxl345 accelerometer, + * also covers the adlx375 accelerometer + * @dev: Driver model representation of the device + * @regmap: Regmap instance for the device + * @setup: Setup routine to be executed right before the standard device + * setup + * + * Return: 0 on success, negative errno on error + */ +int adxl345_core_probe(struct device *dev, struct regmap *regmap, + int (*setup)(struct device*, struct regmap*)) { struct adxl345_data *data; struct iio_dev *indio_dev; u32 regval; + unsigned int data_format_mask = (ADXL345_DATA_FORMAT_RANGE | + ADXL345_DATA_FORMAT_JUSTIFY | + ADXL345_DATA_FORMAT_FULL_RES | + ADXL345_DATA_FORMAT_SELF_TEST); int ret; - ret = regmap_read(regmap, ADXL345_REG_DEVID, ®val); - if (ret < 0) - return dev_err_probe(dev, ret, "Error reading device ID\n"); - - if (regval != ADXL345_DEVID) - return dev_err_probe(dev, -ENODEV, "Invalid device ID: %x, expected %x\n", - regval, ADXL345_DEVID); - indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; data = iio_priv(indio_dev); data->regmap = regmap; - /* Enable full-resolution mode */ - data->data_range = ADXL345_DATA_FORMAT_FULL_RES; data->info = device_get_match_data(dev); if (!data->info) return -ENODEV; - ret = regmap_write(data->regmap, ADXL345_REG_DATA_FORMAT, - data->data_range); - if (ret < 0) - return dev_err_probe(dev, ret, "Failed to set data range\n"); - indio_dev->name = data->info->name; indio_dev->info = &adxl345_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = adxl345_channels; indio_dev->num_channels = ARRAY_SIZE(adxl345_channels); + if (setup) { + /* Perform optional initial bus specific configuration */ + ret = setup(dev, data->regmap); + if (ret) + return ret; + + /* Enable full-resolution mode */ + ret = regmap_update_bits(data->regmap, ADXL345_REG_DATA_FORMAT, + data_format_mask, + ADXL345_DATA_FORMAT_FULL_RES); + if (ret) + return dev_err_probe(dev, ret, + "Failed to set data range\n"); + + } else { + /* Enable full-resolution mode (init all data_format bits) */ + ret = regmap_write(data->regmap, ADXL345_REG_DATA_FORMAT, + ADXL345_DATA_FORMAT_FULL_RES); + if (ret) + return dev_err_probe(dev, ret, + "Failed to set data range\n"); + } + + ret = regmap_read(data->regmap, ADXL345_REG_DEVID, ®val); + if (ret < 0) + return dev_err_probe(dev, ret, "Error reading device ID\n"); + + if (regval != ADXL345_DEVID) + return dev_err_probe(dev, -ENODEV, "Invalid device ID: %x, expected %x\n", + regval, ADXL345_DEVID); + /* Enable measurement mode */ ret = adxl345_powerup(data->regmap); if (ret < 0) diff --git a/drivers/iio/accel/adxl345_i2c.c b/drivers/iio/accel/adxl345_i2c.c index a3084b0a8f7853..4065b8f7c8a8ae 100644 --- a/drivers/iio/accel/adxl345_i2c.c +++ b/drivers/iio/accel/adxl345_i2c.c @@ -27,7 +27,7 @@ static int adxl345_i2c_probe(struct i2c_client *client) if (IS_ERR(regmap)) return dev_err_probe(&client->dev, PTR_ERR(regmap), "Error initializing regmap\n"); - return adxl345_core_probe(&client->dev, regmap); + return adxl345_core_probe(&client->dev, regmap, NULL); } static const struct adxl345_chip_info adxl345_i2c_info = { diff --git a/drivers/iio/accel/adxl345_spi.c b/drivers/iio/accel/adxl345_spi.c index 93ca349f178090..57e16b44170214 100644 --- a/drivers/iio/accel/adxl345_spi.c +++ b/drivers/iio/accel/adxl345_spi.c @@ -20,6 +20,11 @@ static const struct regmap_config adxl345_spi_regmap_config = { .read_flag_mask = BIT(7) | BIT(6), }; +static int adxl345_spi_setup(struct device *dev, struct regmap *regmap) +{ + return regmap_write(regmap, ADXL345_REG_DATA_FORMAT, ADXL345_DATA_FORMAT_SPI_3WIRE); +} + static int adxl345_spi_probe(struct spi_device *spi) { struct regmap *regmap; @@ -33,7 +38,10 @@ static int adxl345_spi_probe(struct spi_device *spi) if (IS_ERR(regmap)) return dev_err_probe(&spi->dev, PTR_ERR(regmap), "Error initializing regmap\n"); - return adxl345_core_probe(&spi->dev, regmap); + if (spi->mode & SPI_3WIRE) + return adxl345_core_probe(&spi->dev, regmap, adxl345_spi_setup); + else + return adxl345_core_probe(&spi->dev, regmap, NULL); } static const struct adxl345_chip_info adxl345_spi_info = { diff --git a/drivers/iio/accel/adxl367.c b/drivers/iio/accel/adxl367.c index 210228affb80d3..5cf4828a5eb5eb 100644 --- a/drivers/iio/accel/adxl367.c +++ b/drivers/iio/accel/adxl367.c @@ -621,7 +621,7 @@ static int _adxl367_set_odr(struct adxl367_state *st, enum adxl367_odr odr) static int adxl367_set_odr(struct iio_dev *indio_dev, enum adxl367_odr odr) { iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { - struct adxl367_state *st = iio_priv(indio_dev);; + struct adxl367_state *st = iio_priv(indio_dev); int ret; guard(mutex)(&st->lock); diff --git a/drivers/iio/accel/fxls8962af-core.c b/drivers/iio/accel/fxls8962af-core.c index be8a15cb945fdf..4fbc01bda62e4c 100644 --- a/drivers/iio/accel/fxls8962af-core.c +++ b/drivers/iio/accel/fxls8962af-core.c @@ -15,9 +15,11 @@ #include <linux/bits.h> #include <linux/bitfield.h> #include <linux/i2c.h> +#include <linux/irq.h> #include <linux/module.h> -#include <linux/of_irq.h> +#include <linux/mod_devicetable.h> #include <linux/pm_runtime.h> +#include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/regmap.h> @@ -1062,12 +1064,12 @@ static void fxls8962af_pm_disable(void *dev_ptr) fxls8962af_standby(iio_priv(indio_dev)); } -static void fxls8962af_get_irq(struct device_node *of_node, +static void fxls8962af_get_irq(struct device *dev, enum fxls8962af_int_pin *pin) { int irq; - irq = of_irq_get_byname(of_node, "INT2"); + irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT2"); if (irq > 0) { *pin = FXLS8962AF_PIN_INT2; return; @@ -1086,7 +1088,7 @@ static int fxls8962af_irq_setup(struct iio_dev *indio_dev, int irq) u8 int_pin_sel; int ret; - fxls8962af_get_irq(dev->of_node, &int_pin); + fxls8962af_get_irq(dev, &int_pin); switch (int_pin) { case FXLS8962AF_PIN_INT1: int_pin_sel = FXLS8962AF_INT_PIN_SEL_INT1; diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c index d3fd0318e47bf5..62e6369e22696c 100644 --- a/drivers/iio/accel/mma8452.c +++ b/drivers/iio/accel/mma8452.c @@ -19,6 +19,8 @@ */ #include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/property.h> #include <linux/i2c.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> @@ -28,8 +30,6 @@ #include <linux/iio/triggered_buffer.h> #include <linux/iio/events.h> #include <linux/delay.h> -#include <linux/of.h> -#include <linux/of_irq.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> @@ -1642,7 +1642,7 @@ static int mma8452_probe(struct i2c_client *client) if (client->irq) { int irq2; - irq2 = of_irq_get_byname(client->dev.of_node, "INT2"); + irq2 = fwnode_irq_get_byname(dev_fwnode(&client->dev), "INT2"); if (irq2 == client->irq) { dev_dbg(&client->dev, "using interrupt line INT2\n"); diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 0d9282fa67f59c..8db68b80b39156 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -70,6 +70,23 @@ config AD7124 To compile this driver as a module, choose M here: the module will be called ad7124. +config AD7173 + tristate "Analog Devices AD7173 driver" + depends on SPI_MASTER + select AD_SIGMA_DELTA + select GPIO_REGMAP if GPIOLIB + select REGMAP_SPI if GPIOLIB + help + Say yes here to build support for Analog Devices AD7173 and similar ADC + Currently supported models: + - AD7172-2 + - AD7173-8 + - AD7175-2 + - AD7176-2 + + To compile this driver as a module, choose M here: the module will be + called ad7173. + config AD7192 tristate "Analog Devices AD7190 AD7192 AD7193 AD7195 ADC driver" depends on SPI @@ -264,6 +281,16 @@ config AD7923 To compile this driver as a module, choose M here: the module will be called ad7923. +config AD7944 + tristate "Analog Devices AD7944 and similar ADCs driver" + depends on SPI + help + Say yes here to build support for Analog Devices + AD7944, AD7985, AD7986 ADCs. + + To compile this driver as a module, choose M here: the + module will be called ad7944 + config AD7949 tristate "Analog Devices AD7949 and similar ADCs driver" depends on SPI diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index b3c434722364a2..edb32ce2af026b 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_AD7091R) += ad7091r-base.o obj-$(CONFIG_AD7091R5) += ad7091r5.o obj-$(CONFIG_AD7091R8) += ad7091r8.o obj-$(CONFIG_AD7124) += ad7124.o +obj-$(CONFIG_AD7173) += ad7173.o obj-$(CONFIG_AD7192) += ad7192.o obj-$(CONFIG_AD7266) += ad7266.o obj-$(CONFIG_AD7280) += ad7280a.o @@ -28,6 +29,7 @@ obj-$(CONFIG_AD7780) += ad7780.o obj-$(CONFIG_AD7791) += ad7791.o obj-$(CONFIG_AD7793) += ad7793.o obj-$(CONFIG_AD7887) += ad7887.o +obj-$(CONFIG_AD7944) += ad7944.o obj-$(CONFIG_AD7949) += ad7949.o obj-$(CONFIG_AD799X) += ad799x.o obj-$(CONFIG_AD9467) += ad9467.o diff --git a/drivers/iio/adc/ab8500-gpadc.c b/drivers/iio/adc/ab8500-gpadc.c index 80645fee79a4cc..59f66e9cb0e867 100644 --- a/drivers/iio/adc/ab8500-gpadc.c +++ b/drivers/iio/adc/ab8500-gpadc.c @@ -1021,14 +1021,13 @@ static int ab8500_gpadc_parse_channel(struct device *dev, /** * ab8500_gpadc_parse_channels() - Parse the GPADC channels from DT * @gpadc: the GPADC to configure the channels for - * @chans: the IIO channels we parsed - * @nchans: the number of IIO channels we parsed + * @chans_parsed: the IIO channels we parsed + * @nchans_parsed: the number of IIO channels we parsed */ static int ab8500_gpadc_parse_channels(struct ab8500_gpadc *gpadc, struct iio_chan_spec **chans_parsed, unsigned int *nchans_parsed) { - struct fwnode_handle *child; struct ab8500_gpadc_chan_info *ch; struct iio_chan_spec *iio_chans; unsigned int nchans; @@ -1052,7 +1051,7 @@ static int ab8500_gpadc_parse_channels(struct ab8500_gpadc *gpadc, return -ENOMEM; i = 0; - device_for_each_child_node(gpadc->dev, child) { + device_for_each_child_node_scoped(gpadc->dev, child) { struct iio_chan_spec *iio_chan; int ret; @@ -1062,7 +1061,6 @@ static int ab8500_gpadc_parse_channels(struct ab8500_gpadc *gpadc, ret = ab8500_gpadc_parse_channel(gpadc->dev, child, ch, iio_chan); if (ret) { - fwnode_handle_put(child); return ret; } i++; diff --git a/drivers/iio/adc/ad4130.c b/drivers/iio/adc/ad4130.c index febb64e67955ee..aaf1fb0ac44772 100644 --- a/drivers/iio/adc/ad4130.c +++ b/drivers/iio/adc/ad4130.c @@ -1600,17 +1600,14 @@ static int ad4130_parse_fw_children(struct iio_dev *indio_dev) { struct ad4130_state *st = iio_priv(indio_dev); struct device *dev = &st->spi->dev; - struct fwnode_handle *child; int ret; indio_dev->channels = st->chans; - device_for_each_child_node(dev, child) { + device_for_each_child_node_scoped(dev, child) { ret = ad4130_parse_fw_channel(indio_dev, child); - if (ret) { - fwnode_handle_put(child); + if (ret) return ret; - } } return 0; diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c index b9b206fcd748f5..e7b1d517d3def7 100644 --- a/drivers/iio/adc/ad7124.c +++ b/drivers/iio/adc/ad7124.c @@ -14,7 +14,8 @@ #include <linux/kernel.h> #include <linux/kfifo.h> #include <linux/module.h> -#include <linux/of.h> +#include <linux/mod_devicetable.h> +#include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/spi/spi.h> @@ -807,22 +808,19 @@ static int ad7124_check_chip_id(struct ad7124_state *st) return 0; } -static int ad7124_of_parse_channel_config(struct iio_dev *indio_dev, - struct device_node *np) +static int ad7124_parse_channel_config(struct iio_dev *indio_dev, + struct device *dev) { struct ad7124_state *st = iio_priv(indio_dev); struct ad7124_channel_config *cfg; struct ad7124_channel *channels; - struct device_node *child; struct iio_chan_spec *chan; unsigned int ain[2], channel = 0, tmp; int ret; - st->num_channels = of_get_available_child_count(np); - if (!st->num_channels) { - dev_err(indio_dev->dev.parent, "no channel children\n"); - return -ENODEV; - } + st->num_channels = device_get_child_node_count(dev); + if (!st->num_channels) + return dev_err_probe(dev, -ENODEV, "no channel children\n"); chan = devm_kcalloc(indio_dev->dev.parent, st->num_channels, sizeof(*chan), GFP_KERNEL); @@ -838,39 +836,38 @@ static int ad7124_of_parse_channel_config(struct iio_dev *indio_dev, indio_dev->num_channels = st->num_channels; st->channels = channels; - for_each_available_child_of_node(np, child) { + device_for_each_child_node_scoped(dev, child) { cfg = &st->channels[channel].cfg; - ret = of_property_read_u32(child, "reg", &channel); + ret = fwnode_property_read_u32(child, "reg", &channel); if (ret) - goto err; + return ret; - if (channel >= indio_dev->num_channels) { - dev_err(indio_dev->dev.parent, + if (channel >= indio_dev->num_channels) + return dev_err_probe(dev, -EINVAL, "Channel index >= number of channels\n"); - ret = -EINVAL; - goto err; - } - ret = of_property_read_u32_array(child, "diff-channels", - ain, 2); + ret = fwnode_property_read_u32_array(child, "diff-channels", + ain, 2); if (ret) - goto err; + return ret; st->channels[channel].nr = channel; st->channels[channel].ain = AD7124_CHANNEL_AINP(ain[0]) | AD7124_CHANNEL_AINM(ain[1]); - cfg->bipolar = of_property_read_bool(child, "bipolar"); + cfg->bipolar = fwnode_property_read_bool(child, "bipolar"); - ret = of_property_read_u32(child, "adi,reference-select", &tmp); + ret = fwnode_property_read_u32(child, "adi,reference-select", &tmp); if (ret) cfg->refsel = AD7124_INT_REF; else cfg->refsel = tmp; - cfg->buf_positive = of_property_read_bool(child, "adi,buffered-positive"); - cfg->buf_negative = of_property_read_bool(child, "adi,buffered-negative"); + cfg->buf_positive = + fwnode_property_read_bool(child, "adi,buffered-positive"); + cfg->buf_negative = + fwnode_property_read_bool(child, "adi,buffered-negative"); chan[channel] = ad7124_channel_template; chan[channel].address = channel; @@ -880,10 +877,6 @@ static int ad7124_of_parse_channel_config(struct iio_dev *indio_dev, } return 0; -err: - of_node_put(child); - - return ret; } static int ad7124_setup(struct ad7124_state *st) @@ -943,9 +936,7 @@ static int ad7124_probe(struct spi_device *spi) struct iio_dev *indio_dev; int i, ret; - info = of_device_get_match_data(&spi->dev); - if (!info) - info = (void *)spi_get_device_id(spi)->driver_data; + info = spi_get_device_match_data(spi); if (!info) return -ENODEV; @@ -965,7 +956,7 @@ static int ad7124_probe(struct spi_device *spi) if (ret < 0) return ret; - ret = ad7124_of_parse_channel_config(indio_dev, spi->dev.of_node); + ret = ad7124_parse_channel_config(indio_dev, &spi->dev); if (ret < 0) return ret; diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c new file mode 100644 index 00000000000000..a7826bba0852af --- /dev/null +++ b/drivers/iio/adc/ad7173.c @@ -0,0 +1,1180 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AD717x family SPI ADC driver + * + * Supported devices: + * AD7172-2/AD7172-4/AD7173-8/AD7175-2 + * AD7175-8/AD7176-2/AD7177-2 + * + * Copyright (C) 2015, 2024 Analog Devices, Inc. + */ + +#include <linux/array_size.h> +#include <linux/bitfield.h> +#include <linux/bitmap.h> +#include <linux/container_of.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/gpio/driver.h> +#include <linux/gpio/regmap.h> +#include <linux/idr.h> +#include <linux/interrupt.h> +#include <linux/math64.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/property.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/types.h> +#include <linux/units.h> + +#include <linux/iio/buffer.h> +#include <linux/iio/iio.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#include <linux/iio/adc/ad_sigma_delta.h> + +#define AD7173_REG_COMMS 0x00 +#define AD7173_REG_ADC_MODE 0x01 +#define AD7173_REG_INTERFACE_MODE 0x02 +#define AD7173_REG_CRC 0x03 +#define AD7173_REG_DATA 0x04 +#define AD7173_REG_GPIO 0x06 +#define AD7173_REG_ID 0x07 +#define AD7173_REG_CH(x) (0x10 + (x)) +#define AD7173_REG_SETUP(x) (0x20 + (x)) +#define AD7173_REG_FILTER(x) (0x28 + (x)) +#define AD7173_REG_OFFSET(x) (0x30 + (x)) +#define AD7173_REG_GAIN(x) (0x38 + (x)) + +#define AD7173_RESET_LENGTH BITS_TO_BYTES(64) + +#define AD7173_CH_ENABLE BIT(15) +#define AD7173_CH_SETUP_SEL_MASK GENMASK(14, 12) +#define AD7173_CH_SETUP_AINPOS_MASK GENMASK(9, 5) +#define AD7173_CH_SETUP_AINNEG_MASK GENMASK(4, 0) + +#define AD7173_CH_ADDRESS(pos, neg) \ + (FIELD_PREP(AD7173_CH_SETUP_AINPOS_MASK, pos) | \ + FIELD_PREP(AD7173_CH_SETUP_AINNEG_MASK, neg)) +#define AD7173_AIN_TEMP_POS 17 +#define AD7173_AIN_TEMP_NEG 18 + +#define AD7172_2_ID 0x00d0 +#define AD7175_ID 0x0cd0 +#define AD7176_ID 0x0c90 +#define AD7175_2_ID 0x0cd0 +#define AD7172_4_ID 0x2050 +#define AD7173_ID 0x30d0 +#define AD7175_8_ID 0x3cd0 +#define AD7177_ID 0x4fd0 +#define AD7173_ID_MASK GENMASK(15, 4) + +#define AD7173_ADC_MODE_REF_EN BIT(15) +#define AD7173_ADC_MODE_SING_CYC BIT(13) +#define AD7173_ADC_MODE_MODE_MASK GENMASK(6, 4) +#define AD7173_ADC_MODE_CLOCKSEL_MASK GENMASK(3, 2) +#define AD7173_ADC_MODE_CLOCKSEL_INT 0x0 +#define AD7173_ADC_MODE_CLOCKSEL_INT_OUTPUT 0x1 +#define AD7173_ADC_MODE_CLOCKSEL_EXT 0x2 +#define AD7173_ADC_MODE_CLOCKSEL_XTAL 0x3 + +#define AD7173_GPIO_PDSW BIT(14) +#define AD7173_GPIO_OP_EN2_3 BIT(13) +#define AD7173_GPIO_MUX_IO BIT(12) +#define AD7173_GPIO_SYNC_EN BIT(11) +#define AD7173_GPIO_ERR_EN BIT(10) +#define AD7173_GPIO_ERR_DAT BIT(9) +#define AD7173_GPIO_GP_DATA3 BIT(7) +#define AD7173_GPIO_GP_DATA2 BIT(6) +#define AD7173_GPIO_IP_EN1 BIT(5) +#define AD7173_GPIO_IP_EN0 BIT(4) +#define AD7173_GPIO_OP_EN1 BIT(3) +#define AD7173_GPIO_OP_EN0 BIT(2) +#define AD7173_GPIO_GP_DATA1 BIT(1) +#define AD7173_GPIO_GP_DATA0 BIT(0) + +#define AD7173_GPO12_DATA(x) BIT((x) + 0) +#define AD7173_GPO23_DATA(x) BIT((x) + 4) +#define AD7173_GPO_DATA(x) ((x) < 2 ? AD7173_GPO12_DATA(x) : AD7173_GPO23_DATA(x)) + +#define AD7173_INTERFACE_DATA_STAT BIT(6) +#define AD7173_INTERFACE_DATA_STAT_EN(x) \ + FIELD_PREP(AD7173_INTERFACE_DATA_STAT, x) + +#define AD7173_SETUP_BIPOLAR BIT(12) +#define AD7173_SETUP_AREF_BUF_MASK GENMASK(11, 10) +#define AD7173_SETUP_AIN_BUF_MASK GENMASK(9, 8) + +#define AD7173_SETUP_REF_SEL_MASK GENMASK(5, 4) +#define AD7173_SETUP_REF_SEL_AVDD1_AVSS 0x3 +#define AD7173_SETUP_REF_SEL_INT_REF 0x2 +#define AD7173_SETUP_REF_SEL_EXT_REF2 0x1 +#define AD7173_SETUP_REF_SEL_EXT_REF 0x0 +#define AD7173_VOLTAGE_INT_REF_uV 2500000 +#define AD7173_TEMP_SENSIIVITY_uV_per_C 477 +#define AD7177_ODR_START_VALUE 0x07 + +#define AD7173_FILTER_ODR0_MASK GENMASK(5, 0) +#define AD7173_MAX_CONFIGS 8 + +enum ad7173_ids { + ID_AD7172_2, + ID_AD7172_4, + ID_AD7173_8, + ID_AD7175_2, + ID_AD7175_8, + ID_AD7176_2, + ID_AD7177_2, +}; + +struct ad7173_device_info { + const unsigned int *sinc5_data_rates; + unsigned int num_sinc5_data_rates; + unsigned int odr_start_value; + unsigned int num_channels; + unsigned int num_configs; + unsigned int num_inputs; + unsigned int clock; + unsigned int id; + char *name; + bool has_temp; + bool has_int_ref; + bool has_ref2; + u8 num_gpios; +}; + +struct ad7173_channel_config { + u8 cfg_slot; + bool live; + + /* Following fields are used to compare equality. */ + struct_group(config_props, + bool bipolar; + bool input_buf; + u8 odr; + u8 ref_sel; + ); +}; + +struct ad7173_channel { + unsigned int chan_reg; + unsigned int ain; + struct ad7173_channel_config cfg; +}; + +struct ad7173_state { + struct ad_sigma_delta sd; + const struct ad7173_device_info *info; + struct ad7173_channel *channels; + struct regulator_bulk_data regulators[3]; + unsigned int adc_mode; + unsigned int interface_mode; + unsigned int num_channels; + struct ida cfg_slots_status; + unsigned long long config_usage_counter; + unsigned long long *config_cnts; + struct clk *ext_clk; + struct clk_hw int_clk_hw; +#if IS_ENABLED(CONFIG_GPIOLIB) + struct regmap *reg_gpiocon_regmap; + struct gpio_regmap *gpio_regmap; +#endif +}; + +static const unsigned int ad7173_sinc5_data_rates[] = { + 6211000, 6211000, 6211000, 6211000, 6211000, 6211000, 5181000, 4444000, /* 0-7 */ + 3115000, 2597000, 1007000, 503800, 381000, 200300, 100500, 59520, /* 8-15 */ + 49680, 20010, 16333, 10000, 5000, 2500, 1250, /* 16-22 */ +}; + +static const unsigned int ad7175_sinc5_data_rates[] = { + 50000000, 41667000, 31250000, 27778000, /* 0-3 */ + 20833000, 17857000, 12500000, 10000000, /* 4-7 */ + 5000000, 2500000, 1000000, 500000, /* 8-11 */ + 397500, 200000, 100000, 59920, /* 12-15 */ + 49960, 20000, 16666, 10000, /* 16-19 */ + 5000, /* 20 */ +}; + +static const struct ad7173_device_info ad7173_device_info[] = { + [ID_AD7172_2] = { + .name = "ad7172-2", + .id = AD7172_2_ID, + .num_inputs = 5, + .num_channels = 4, + .num_configs = 4, + .num_gpios = 2, + .has_temp = true, + .has_int_ref = true, + .clock = 2 * HZ_PER_MHZ, + .sinc5_data_rates = ad7173_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), + }, + [ID_AD7172_4] = { + .id = AD7172_4_ID, + .num_inputs = 9, + .num_channels = 8, + .num_configs = 8, + .num_gpios = 4, + .has_temp = false, + .has_ref2 = true, + .clock = 2 * HZ_PER_MHZ, + .sinc5_data_rates = ad7173_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), + }, + [ID_AD7173_8] = { + .name = "ad7173-8", + .id = AD7173_ID, + .num_inputs = 17, + .num_channels = 16, + .num_configs = 8, + .num_gpios = 4, + .has_temp = true, + .has_int_ref = true, + .has_ref2 = true, + .clock = 2 * HZ_PER_MHZ, + .sinc5_data_rates = ad7173_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), + }, + [ID_AD7175_2] = { + .name = "ad7175-2", + .id = AD7175_2_ID, + .num_inputs = 5, + .num_channels = 4, + .num_configs = 4, + .num_gpios = 2, + .has_temp = true, + .has_int_ref = true, + .clock = 16 * HZ_PER_MHZ, + .sinc5_data_rates = ad7175_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), + }, + [ID_AD7175_8] = { + .id = AD7175_8_ID, + .num_inputs = 17, + .num_channels = 16, + .num_configs = 8, + .num_gpios = 4, + .has_temp = true, + .has_int_ref = true, + .has_ref2 = true, + .clock = 16 * HZ_PER_MHZ, + .sinc5_data_rates = ad7175_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), + }, + [ID_AD7176_2] = { + .name = "ad7176-2", + .id = AD7176_ID, + .num_inputs = 5, + .num_channels = 4, + .num_configs = 4, + .num_gpios = 2, + .has_temp = false, + .has_int_ref = true, + .clock = 16 * HZ_PER_MHZ, + .sinc5_data_rates = ad7175_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), + }, + [ID_AD7177_2] = { + .id = AD7177_ID, + .num_inputs = 5, + .num_channels = 4, + .num_configs = 4, + .num_gpios = 2, + .has_temp = true, + .has_int_ref = true, + .clock = 16 * HZ_PER_MHZ, + .odr_start_value = AD7177_ODR_START_VALUE, + .sinc5_data_rates = ad7175_sinc5_data_rates, + .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), + }, +}; + +static const char *const ad7173_ref_sel_str[] = { + [AD7173_SETUP_REF_SEL_EXT_REF] = "vref", + [AD7173_SETUP_REF_SEL_EXT_REF2] = "vref2", + [AD7173_SETUP_REF_SEL_INT_REF] = "refout-avss", + [AD7173_SETUP_REF_SEL_AVDD1_AVSS] = "avdd", +}; + +static const char *const ad7173_clk_sel[] = { + "ext-clk", "xtal" +}; + +#if IS_ENABLED(CONFIG_GPIOLIB) + +static const struct regmap_range ad7173_range_gpio[] = { + regmap_reg_range(AD7173_REG_GPIO, AD7173_REG_GPIO), +}; + +static const struct regmap_access_table ad7173_access_table = { + .yes_ranges = ad7173_range_gpio, + .n_yes_ranges = ARRAY_SIZE(ad7173_range_gpio), +}; + +static const struct regmap_config ad7173_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + .rd_table = &ad7173_access_table, + .wr_table = &ad7173_access_table, + .read_flag_mask = BIT(6), +}; + +static int ad7173_mask_xlate(struct gpio_regmap *gpio, unsigned int base, + unsigned int offset, unsigned int *reg, + unsigned int *mask) +{ + *mask = AD7173_GPO_DATA(offset); + *reg = base; + return 0; +} + +static void ad7173_gpio_disable(void *data) +{ + struct ad7173_state *st = data; + unsigned int mask; + + mask = AD7173_GPIO_OP_EN0 | AD7173_GPIO_OP_EN1 | AD7173_GPIO_OP_EN2_3; + regmap_update_bits(st->reg_gpiocon_regmap, AD7173_REG_GPIO, mask, ~mask); +} + +static int ad7173_gpio_init(struct ad7173_state *st) +{ + struct gpio_regmap_config gpio_regmap = {}; + struct device *dev = &st->sd.spi->dev; + unsigned int mask; + int ret; + + st->reg_gpiocon_regmap = devm_regmap_init_spi(st->sd.spi, &ad7173_regmap_config); + ret = PTR_ERR_OR_ZERO(st->reg_gpiocon_regmap); + if (ret) + return dev_err_probe(dev, ret, "Unable to init regmap\n"); + + mask = AD7173_GPIO_OP_EN0 | AD7173_GPIO_OP_EN1 | AD7173_GPIO_OP_EN2_3; + regmap_update_bits(st->reg_gpiocon_regmap, AD7173_REG_GPIO, mask, mask); + + ret = devm_add_action_or_reset(dev, ad7173_gpio_disable, st); + if (ret) + return ret; + + gpio_regmap.parent = dev; + gpio_regmap.regmap = st->reg_gpiocon_regmap; + gpio_regmap.ngpio = st->info->num_gpios; + gpio_regmap.reg_set_base = AD7173_REG_GPIO; + gpio_regmap.reg_mask_xlate = ad7173_mask_xlate; + + st->gpio_regmap = devm_gpio_regmap_register(dev, &gpio_regmap); + ret = PTR_ERR_OR_ZERO(st->gpio_regmap); + if (ret) + return dev_err_probe(dev, ret, "Unable to init gpio-regmap\n"); + + return 0; +} +#else +static int ad7173_gpio_init(struct ad7173_state *st) +{ + return 0; +} +#endif /* CONFIG_GPIOLIB */ + +static struct ad7173_state *ad_sigma_delta_to_ad7173(struct ad_sigma_delta *sd) +{ + return container_of(sd, struct ad7173_state, sd); +} + +static struct ad7173_state *clk_hw_to_ad7173(struct clk_hw *hw) +{ + return container_of(hw, struct ad7173_state, int_clk_hw); +} + +static void ad7173_ida_destroy(void *data) +{ + struct ad7173_state *st = data; + + ida_destroy(&st->cfg_slots_status); +} + +static void ad7173_reset_usage_cnts(struct ad7173_state *st) +{ + memset64(st->config_cnts, 0, st->info->num_configs); + st->config_usage_counter = 0; +} + +static struct ad7173_channel_config * +ad7173_find_live_config(struct ad7173_state *st, struct ad7173_channel_config *cfg) +{ + struct ad7173_channel_config *cfg_aux; + ptrdiff_t cmp_size; + int i; + + cmp_size = sizeof_field(struct ad7173_channel_config, config_props); + for (i = 0; i < st->num_channels; i++) { + cfg_aux = &st->channels[i].cfg; + + if (cfg_aux->live && + !memcmp(&cfg->config_props, &cfg_aux->config_props, cmp_size)) + return cfg_aux; + } + return NULL; +} + +/* Could be replaced with a generic LRU implementation */ +static int ad7173_free_config_slot_lru(struct ad7173_state *st) +{ + int i, lru_position = 0; + + for (i = 1; i < st->info->num_configs; i++) + if (st->config_cnts[i] < st->config_cnts[lru_position]) + lru_position = i; + + for (i = 0; i < st->num_channels; i++) + if (st->channels[i].cfg.cfg_slot == lru_position) + st->channels[i].cfg.live = false; + + ida_free(&st->cfg_slots_status, lru_position); + return ida_alloc(&st->cfg_slots_status, GFP_KERNEL); +} + +/* Could be replaced with a generic LRU implementation */ +static int ad7173_load_config(struct ad7173_state *st, + struct ad7173_channel_config *cfg) +{ + unsigned int config; + int free_cfg_slot, ret; + + free_cfg_slot = ida_alloc_range(&st->cfg_slots_status, 0, + st->info->num_configs - 1, GFP_KERNEL); + if (free_cfg_slot < 0) + free_cfg_slot = ad7173_free_config_slot_lru(st); + + cfg->cfg_slot = free_cfg_slot; + config = FIELD_PREP(AD7173_SETUP_REF_SEL_MASK, cfg->ref_sel); + + if (cfg->bipolar) + config |= AD7173_SETUP_BIPOLAR; + + if (cfg->input_buf) + config |= AD7173_SETUP_AIN_BUF_MASK; + + ret = ad_sd_write_reg(&st->sd, AD7173_REG_SETUP(free_cfg_slot), 2, config); + if (ret) + return ret; + + return ad_sd_write_reg(&st->sd, AD7173_REG_FILTER(free_cfg_slot), 2, + AD7173_FILTER_ODR0_MASK & cfg->odr); +} + +static int ad7173_config_channel(struct ad7173_state *st, int addr) +{ + struct ad7173_channel_config *cfg = &st->channels[addr].cfg; + struct ad7173_channel_config *live_cfg; + int ret; + + if (!cfg->live) { + live_cfg = ad7173_find_live_config(st, cfg); + if (live_cfg) { + cfg->cfg_slot = live_cfg->cfg_slot; + } else { + ret = ad7173_load_config(st, cfg); + if (ret) + return ret; + cfg->live = true; + } + } + + if (st->config_usage_counter == U64_MAX) + ad7173_reset_usage_cnts(st); + + st->config_usage_counter++; + st->config_cnts[cfg->cfg_slot] = st->config_usage_counter; + + return 0; +} + +static int ad7173_set_channel(struct ad_sigma_delta *sd, unsigned int channel) +{ + struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd); + unsigned int val; + int ret; + + ret = ad7173_config_channel(st, channel); + if (ret) + return ret; + + val = AD7173_CH_ENABLE | + FIELD_PREP(AD7173_CH_SETUP_SEL_MASK, st->channels[channel].cfg.cfg_slot) | + st->channels[channel].ain; + + return ad_sd_write_reg(&st->sd, AD7173_REG_CH(channel), 2, val); +} + +static int ad7173_set_mode(struct ad_sigma_delta *sd, + enum ad_sigma_delta_mode mode) +{ + struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd); + + st->adc_mode &= ~AD7173_ADC_MODE_MODE_MASK; + st->adc_mode |= FIELD_PREP(AD7173_ADC_MODE_MODE_MASK, mode); + + return ad_sd_write_reg(&st->sd, AD7173_REG_ADC_MODE, 2, st->adc_mode); +} + +static int ad7173_append_status(struct ad_sigma_delta *sd, bool append) +{ + struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd); + unsigned int interface_mode = st->interface_mode; + int ret; + + interface_mode |= AD7173_INTERFACE_DATA_STAT_EN(append); + ret = ad_sd_write_reg(&st->sd, AD7173_REG_INTERFACE_MODE, 2, interface_mode); + if (ret) + return ret; + + st->interface_mode = interface_mode; + + return 0; +} + +static int ad7173_disable_all(struct ad_sigma_delta *sd) +{ + struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd); + int ret; + int i; + + for (i = 0; i < st->num_channels; i++) { + ret = ad_sd_write_reg(sd, AD7173_REG_CH(i), 2, 0); + if (ret < 0) + return ret; + } + + return 0; +} + +static struct ad_sigma_delta_info ad7173_sigma_delta_info = { + .set_channel = ad7173_set_channel, + .append_status = ad7173_append_status, + .disable_all = ad7173_disable_all, + .set_mode = ad7173_set_mode, + .has_registers = true, + .addr_shift = 0, + .read_mask = BIT(6), + .status_ch_mask = GENMASK(3, 0), + .data_reg = AD7173_REG_DATA, +}; + +static int ad7173_setup(struct iio_dev *indio_dev) +{ + struct ad7173_state *st = iio_priv(indio_dev); + struct device *dev = &st->sd.spi->dev; + u8 buf[AD7173_RESET_LENGTH]; + unsigned int id; + int ret; + + /* reset the serial interface */ + memset(buf, 0xff, AD7173_RESET_LENGTH); + ret = spi_write_then_read(st->sd.spi, buf, sizeof(buf), NULL, 0); + if (ret < 0) + return ret; + + /* datasheet recommends a delay of at least 500us after reset */ + fsleep(500); + + ret = ad_sd_read_reg(&st->sd, AD7173_REG_ID, 2, &id); + if (ret) + return ret; + + id &= AD7173_ID_MASK; + if (id != st->info->id) + dev_warn(dev, "Unexpected device id: 0x%04X, expected: 0x%04X\n", + id, st->info->id); + + st->adc_mode |= AD7173_ADC_MODE_SING_CYC; + st->interface_mode = 0x0; + + st->config_usage_counter = 0; + st->config_cnts = devm_kcalloc(dev, st->info->num_configs, + sizeof(*st->config_cnts), GFP_KERNEL); + if (!st->config_cnts) + return -ENOMEM; + + /* All channels are enabled by default after a reset */ + return ad7173_disable_all(&st->sd); +} + +static unsigned int ad7173_get_ref_voltage_milli(struct ad7173_state *st, + u8 reference_select) +{ + int vref; + + switch (reference_select) { + case AD7173_SETUP_REF_SEL_EXT_REF: + vref = regulator_get_voltage(st->regulators[0].consumer); + break; + + case AD7173_SETUP_REF_SEL_EXT_REF2: + vref = regulator_get_voltage(st->regulators[1].consumer); + break; + + case AD7173_SETUP_REF_SEL_INT_REF: + vref = AD7173_VOLTAGE_INT_REF_uV; + break; + + case AD7173_SETUP_REF_SEL_AVDD1_AVSS: + vref = regulator_get_voltage(st->regulators[2].consumer); + break; + + default: + return -EINVAL; + } + + if (vref < 0) + return vref; + + return vref / (MICRO / MILLI); +} + +static int ad7173_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long info) +{ + struct ad7173_state *st = iio_priv(indio_dev); + struct ad7173_channel *ch = &st->channels[chan->address]; + unsigned int reg; + u64 temp; + int ret; + + switch (info) { + case IIO_CHAN_INFO_RAW: + ret = ad_sigma_delta_single_conversion(indio_dev, chan, val); + if (ret < 0) + return ret; + + /* disable channel after single conversion */ + ret = ad_sd_write_reg(&st->sd, AD7173_REG_CH(chan->address), 2, 0); + if (ret < 0) + return ret; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + if (chan->type == IIO_TEMP) { + temp = AD7173_VOLTAGE_INT_REF_uV * MILLI; + temp /= AD7173_TEMP_SENSIIVITY_uV_per_C; + *val = temp; + *val2 = chan->scan_type.realbits; + } else { + *val = ad7173_get_ref_voltage_milli(st, ch->cfg.ref_sel); + *val2 = chan->scan_type.realbits - !!(ch->cfg.bipolar); + } + return IIO_VAL_FRACTIONAL_LOG2; + case IIO_CHAN_INFO_OFFSET: + if (chan->type == IIO_TEMP) { + /* 0 Kelvin -> raw sample */ + temp = -ABSOLUTE_ZERO_MILLICELSIUS; + temp *= AD7173_TEMP_SENSIIVITY_uV_per_C; + temp <<= chan->scan_type.realbits; + temp = DIV_U64_ROUND_CLOSEST(temp, + AD7173_VOLTAGE_INT_REF_uV * + MILLI); + *val = -temp; + } else { + *val = -BIT(chan->scan_type.realbits - 1); + } + return IIO_VAL_INT; + case IIO_CHAN_INFO_SAMP_FREQ: + reg = st->channels[chan->address].cfg.odr; + + *val = st->info->sinc5_data_rates[reg] / MILLI; + *val2 = (st->info->sinc5_data_rates[reg] % MILLI) * (MICRO / MILLI); + + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } +} + +static int ad7173_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long info) +{ + struct ad7173_state *st = iio_priv(indio_dev); + struct ad7173_channel_config *cfg; + unsigned int freq, i, reg; + int ret; + + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + + switch (info) { + case IIO_CHAN_INFO_SAMP_FREQ: + freq = val * MILLI + val2 / MILLI; + for (i = st->info->odr_start_value; i < st->info->num_sinc5_data_rates - 1; i++) + if (freq >= st->info->sinc5_data_rates[i]) + break; + + cfg = &st->channels[chan->address].cfg; + cfg->odr = i; + + if (!cfg->live) + break; + + ret = ad_sd_read_reg(&st->sd, AD7173_REG_FILTER(cfg->cfg_slot), 2, ®); + if (ret) + break; + reg &= ~AD7173_FILTER_ODR0_MASK; + reg |= FIELD_PREP(AD7173_FILTER_ODR0_MASK, i); + ret = ad_sd_write_reg(&st->sd, AD7173_REG_FILTER(cfg->cfg_slot), 2, reg); + break; + + default: + ret = -EINVAL; + break; + } + + iio_device_release_direct_mode(indio_dev); + return ret; +} + +static int ad7173_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct ad7173_state *st = iio_priv(indio_dev); + int i, ret; + + for (i = 0; i < indio_dev->num_channels; i++) { + if (test_bit(i, scan_mask)) + ret = ad7173_set_channel(&st->sd, i); + else + ret = ad_sd_write_reg(&st->sd, AD7173_REG_CH(i), 2, 0); + if (ret < 0) + return ret; + } + + return 0; +} + +static int ad7173_debug_reg_access(struct iio_dev *indio_dev, unsigned int reg, + unsigned int writeval, unsigned int *readval) +{ + struct ad7173_state *st = iio_priv(indio_dev); + u8 reg_size; + + if (reg == AD7173_REG_COMMS) + reg_size = 1; + else if (reg == AD7173_REG_CRC || reg == AD7173_REG_DATA || + reg >= AD7173_REG_OFFSET(0)) + reg_size = 3; + else + reg_size = 2; + + if (readval) + return ad_sd_read_reg(&st->sd, reg, reg_size, readval); + + return ad_sd_write_reg(&st->sd, reg, reg_size, writeval); +} + +static const struct iio_info ad7173_info = { + .read_raw = &ad7173_read_raw, + .write_raw = &ad7173_write_raw, + .debugfs_reg_access = &ad7173_debug_reg_access, + .validate_trigger = ad_sd_validate_trigger, + .update_scan_mode = ad7173_update_scan_mode, +}; + +static const struct iio_chan_spec ad7173_channel_template = { + .type = IIO_VOLTAGE, + .indexed = 1, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .scan_type = { + .sign = 'u', + .realbits = 24, + .storagebits = 32, + .endianness = IIO_BE, + }, +}; + +static const struct iio_chan_spec ad7173_temp_iio_channel_template = { + .type = IIO_TEMP, + .indexed = 1, + .channel = AD7173_AIN_TEMP_POS, + .channel2 = AD7173_AIN_TEMP_NEG, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .scan_type = { + .sign = 'u', + .realbits = 24, + .storagebits = 32, + .endianness = IIO_BE, + }, +}; + +static void ad7173_disable_regulators(void *data) +{ + struct ad7173_state *st = data; + + regulator_bulk_disable(ARRAY_SIZE(st->regulators), st->regulators); +} + +static void ad7173_clk_disable_unprepare(void *clk) +{ + clk_disable_unprepare(clk); +} + +static unsigned long ad7173_sel_clk(struct ad7173_state *st, + unsigned int clk_sel) +{ + int ret; + + st->adc_mode &= ~AD7173_ADC_MODE_CLOCKSEL_MASK; + st->adc_mode |= FIELD_PREP(AD7173_ADC_MODE_CLOCKSEL_MASK, clk_sel); + ret = ad_sd_write_reg(&st->sd, AD7173_REG_ADC_MODE, 0x2, st->adc_mode); + + return ret; +} + +static unsigned long ad7173_clk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct ad7173_state *st = clk_hw_to_ad7173(hw); + + return st->info->clock / HZ_PER_KHZ; +} + +static int ad7173_clk_output_is_enabled(struct clk_hw *hw) +{ + struct ad7173_state *st = clk_hw_to_ad7173(hw); + u32 clk_sel; + + clk_sel = FIELD_GET(AD7173_ADC_MODE_CLOCKSEL_MASK, st->adc_mode); + return clk_sel == AD7173_ADC_MODE_CLOCKSEL_INT_OUTPUT; +} + +static int ad7173_clk_output_prepare(struct clk_hw *hw) +{ + struct ad7173_state *st = clk_hw_to_ad7173(hw); + + return ad7173_sel_clk(st, AD7173_ADC_MODE_CLOCKSEL_INT_OUTPUT); +} + +static void ad7173_clk_output_unprepare(struct clk_hw *hw) +{ + struct ad7173_state *st = clk_hw_to_ad7173(hw); + + ad7173_sel_clk(st, AD7173_ADC_MODE_CLOCKSEL_INT); +} + +static const struct clk_ops ad7173_int_clk_ops = { + .recalc_rate = ad7173_clk_recalc_rate, + .is_enabled = ad7173_clk_output_is_enabled, + .prepare = ad7173_clk_output_prepare, + .unprepare = ad7173_clk_output_unprepare, +}; + +static int ad7173_register_clk_provider(struct iio_dev *indio_dev) +{ + struct ad7173_state *st = iio_priv(indio_dev); + struct device *dev = indio_dev->dev.parent; + struct fwnode_handle *fwnode = dev_fwnode(dev); + struct clk_init_data init = {}; + int ret; + + if (!IS_ENABLED(CONFIG_COMMON_CLK)) + return 0; + + init.name = fwnode_get_name(fwnode); + init.ops = &ad7173_int_clk_ops; + + st->int_clk_hw.init = &init; + ret = devm_clk_hw_register(dev, &st->int_clk_hw); + if (ret) + return ret; + + return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, + &st->int_clk_hw); +} + +static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev) +{ + struct ad7173_channel *chans_st_arr, *chan_st_priv; + struct ad7173_state *st = iio_priv(indio_dev); + struct device *dev = indio_dev->dev.parent; + struct iio_chan_spec *chan_arr, *chan; + unsigned int ain[2], chan_index = 0; + int ref_sel, ret; + + chan_arr = devm_kcalloc(dev, sizeof(*indio_dev->channels), + st->num_channels, GFP_KERNEL); + if (!chan_arr) + return -ENOMEM; + + chans_st_arr = devm_kcalloc(dev, st->num_channels, sizeof(*st->channels), + GFP_KERNEL); + if (!chans_st_arr) + return -ENOMEM; + + indio_dev->channels = chan_arr; + st->channels = chans_st_arr; + + if (st->info->has_temp) { + chan_arr[chan_index] = ad7173_temp_iio_channel_template; + chan_st_priv = &chans_st_arr[chan_index]; + chan_st_priv->ain = + AD7173_CH_ADDRESS(chan_arr[chan_index].channel, + chan_arr[chan_index].channel2); + chan_st_priv->cfg.bipolar = false; + chan_st_priv->cfg.input_buf = true; + chan_st_priv->cfg.ref_sel = AD7173_SETUP_REF_SEL_INT_REF; + st->adc_mode |= AD7173_ADC_MODE_REF_EN; + + chan_index++; + } + + device_for_each_child_node_scoped(dev, child) { + chan = &chan_arr[chan_index]; + chan_st_priv = &chans_st_arr[chan_index]; + ret = fwnode_property_read_u32_array(child, "diff-channels", + ain, ARRAY_SIZE(ain)); + if (ret) + return ret; + + if (ain[0] >= st->info->num_inputs || + ain[1] >= st->info->num_inputs) + return dev_err_probe(dev, -EINVAL, + "Input pin number out of range for pair (%d %d).\n", + ain[0], ain[1]); + + ret = fwnode_property_match_property_string(child, + "adi,reference-select", + ad7173_ref_sel_str, + ARRAY_SIZE(ad7173_ref_sel_str)); + if (ret < 0) + ref_sel = AD7173_SETUP_REF_SEL_INT_REF; + else + ref_sel = ret; + + if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF && + !st->info->has_int_ref) + return dev_err_probe(dev, -EINVAL, + "Internal reference is not available on current model.\n"); + + if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 && !st->info->has_ref2) + return dev_err_probe(dev, -EINVAL, + "External reference 2 is not available on current model.\n"); + + ret = ad7173_get_ref_voltage_milli(st, ref_sel); + if (ret < 0) + return dev_err_probe(dev, ret, + "Cannot use reference %u\n", ref_sel); + + if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF) + st->adc_mode |= AD7173_ADC_MODE_REF_EN; + chan_st_priv->cfg.ref_sel = ref_sel; + + *chan = ad7173_channel_template; + chan->address = chan_index; + chan->scan_index = chan_index; + chan->channel = ain[0]; + chan->channel2 = ain[1]; + chan->differential = true; + + chan_st_priv->ain = AD7173_CH_ADDRESS(ain[0], ain[1]); + chan_st_priv->chan_reg = chan_index; + chan_st_priv->cfg.input_buf = true; + chan_st_priv->cfg.odr = 0; + + chan_st_priv->cfg.bipolar = fwnode_property_read_bool(child, "bipolar"); + if (chan_st_priv->cfg.bipolar) + chan->info_mask_separate |= BIT(IIO_CHAN_INFO_OFFSET); + + chan_index++; + } + return 0; +} + +static int ad7173_fw_parse_device_config(struct iio_dev *indio_dev) +{ + struct ad7173_state *st = iio_priv(indio_dev); + struct device *dev = indio_dev->dev.parent; + unsigned int num_channels; + int ret; + + st->regulators[0].supply = ad7173_ref_sel_str[AD7173_SETUP_REF_SEL_EXT_REF]; + st->regulators[1].supply = ad7173_ref_sel_str[AD7173_SETUP_REF_SEL_EXT_REF2]; + st->regulators[2].supply = ad7173_ref_sel_str[AD7173_SETUP_REF_SEL_AVDD1_AVSS]; + + /* + * If a regulator is not available, it will be set to a dummy regulator. + * Each channel reference is checked with regulator_get_voltage() before + * setting attributes so if any channel uses a dummy supply the driver + * probe will fail. + */ + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(st->regulators), + st->regulators); + if (ret) + return dev_err_probe(dev, ret, "Failed to get regulators\n"); + + ret = regulator_bulk_enable(ARRAY_SIZE(st->regulators), st->regulators); + if (ret) + return dev_err_probe(dev, ret, "Failed to enable regulators\n"); + + ret = devm_add_action_or_reset(dev, ad7173_disable_regulators, st); + if (ret) + return dev_err_probe(dev, ret, + "Failed to add regulators disable action\n"); + + ret = device_property_match_property_string(dev, "clock-names", + ad7173_clk_sel, + ARRAY_SIZE(ad7173_clk_sel)); + if (ret < 0) { + st->adc_mode |= FIELD_PREP(AD7173_ADC_MODE_CLOCKSEL_MASK, + AD7173_ADC_MODE_CLOCKSEL_INT); + ad7173_register_clk_provider(indio_dev); + } else { + st->adc_mode |= FIELD_PREP(AD7173_ADC_MODE_CLOCKSEL_MASK, + AD7173_ADC_MODE_CLOCKSEL_EXT + ret); + st->ext_clk = devm_clk_get(dev, ad7173_clk_sel[ret]); + if (IS_ERR(st->ext_clk)) + return dev_err_probe(dev, PTR_ERR(st->ext_clk), + "Failed to get external clock\n"); + + ret = clk_prepare_enable(st->ext_clk); + if (ret) + return dev_err_probe(dev, ret, + "Failed to enable external clock\n"); + + ret = devm_add_action_or_reset(dev, ad7173_clk_disable_unprepare, + st->ext_clk); + if (ret) + return ret; + } + + ret = fwnode_irq_get_byname(dev_fwnode(dev), "rdy"); + if (ret < 0) + return dev_err_probe(dev, ret, "Interrupt 'rdy' is required\n"); + + ad7173_sigma_delta_info.irq_line = ret; + + num_channels = device_get_child_node_count(dev); + + if (st->info->has_temp) + num_channels++; + + if (num_channels == 0) + return dev_err_probe(dev, -ENODATA, "No channels specified\n"); + indio_dev->num_channels = num_channels; + st->num_channels = num_channels; + + return ad7173_fw_parse_channel_config(indio_dev); +} + +static int ad7173_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct ad7173_state *st; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + st->info = spi_get_device_match_data(spi); + if (!st->info) + return -ENODEV; + + ida_init(&st->cfg_slots_status); + ret = devm_add_action_or_reset(dev, ad7173_ida_destroy, st); + if (ret) + return ret; + + indio_dev->name = st->info->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &ad7173_info; + + spi->mode = SPI_MODE_3; + spi_setup(spi); + + ad7173_sigma_delta_info.num_slots = st->info->num_configs; + ret = ad_sd_init(&st->sd, indio_dev, spi, &ad7173_sigma_delta_info); + if (ret) + return ret; + + ret = ad7173_fw_parse_device_config(indio_dev); + if (ret) + return ret; + + ret = devm_ad_sd_setup_buffer_and_trigger(dev, indio_dev); + if (ret) + return ret; + + ret = ad7173_setup(indio_dev); + if (ret) + return ret; + + ret = devm_iio_device_register(dev, indio_dev); + if (ret) + return ret; + + if (IS_ENABLED(CONFIG_GPIOLIB)) + return ad7173_gpio_init(st); + + return 0; +} + +static const struct of_device_id ad7173_of_match[] = { + { .compatible = "adi,ad7172-2", + .data = &ad7173_device_info[ID_AD7172_2]}, + { .compatible = "adi,ad7172-4", + .data = &ad7173_device_info[ID_AD7172_4]}, + { .compatible = "adi,ad7173-8", + .data = &ad7173_device_info[ID_AD7173_8]}, + { .compatible = "adi,ad7175-2", + .data = &ad7173_device_info[ID_AD7175_2]}, + { .compatible = "adi,ad7175-8", + .data = &ad7173_device_info[ID_AD7175_8]}, + { .compatible = "adi,ad7176-2", + .data = &ad7173_device_info[ID_AD7176_2]}, + { .compatible = "adi,ad7177-2", + .data = &ad7173_device_info[ID_AD7177_2]}, + { } +}; +MODULE_DEVICE_TABLE(of, ad7173_of_match); + +static const struct spi_device_id ad7173_id_table[] = { + { "ad7172-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_2]}, + { "ad7172-4", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_4]}, + { "ad7173-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7173_8]}, + { "ad7175-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_2]}, + { "ad7175-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_8]}, + { "ad7176-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7176_2]}, + { "ad7177-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7177_2]}, + { } +}; +MODULE_DEVICE_TABLE(spi, ad7173_id_table); + +static struct spi_driver ad7173_driver = { + .driver = { + .name = "ad7173", + .of_match_table = ad7173_of_match, + }, + .probe = ad7173_probe, + .id_table = ad7173_id_table, +}; +module_spi_driver(ad7173_driver); + +MODULE_IMPORT_NS(IIO_AD_SIGMA_DELTA); +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafo.de>"); +MODULE_AUTHOR("Dumitru Ceclan <dumitru.ceclan@analog.com>"); +MODULE_DESCRIPTION("Analog Devices AD7172/AD7173/AD7175/AD7176 ADC driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c index adc3cbe92d6e6e..7bcc7e2aa2a20c 100644 --- a/drivers/iio/adc/ad7192.c +++ b/drivers/iio/adc/ad7192.c @@ -17,7 +17,9 @@ #include <linux/err.h> #include <linux/sched.h> #include <linux/delay.h> -#include <linux/of.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/property.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> @@ -364,19 +366,19 @@ static inline bool ad7192_valid_external_frequency(u32 freq) freq <= AD7192_EXT_FREQ_MHZ_MAX); } -static int ad7192_of_clock_select(struct ad7192_state *st) +static int ad7192_clock_select(struct ad7192_state *st) { - struct device_node *np = st->sd.spi->dev.of_node; + struct device *dev = &st->sd.spi->dev; unsigned int clock_sel; clock_sel = AD7192_CLK_INT; /* use internal clock */ if (!st->mclk) { - if (of_property_read_bool(np, "adi,int-clock-output-enable")) + if (device_property_read_bool(dev, "adi,int-clock-output-enable")) clock_sel = AD7192_CLK_INT_CO; } else { - if (of_property_read_bool(np, "adi,clock-xtal")) + if (device_property_read_bool(dev, "adi,clock-xtal")) clock_sel = AD7192_CLK_EXT_MCLK1_2; else clock_sel = AD7192_CLK_EXT_MCLK2; @@ -385,7 +387,7 @@ static int ad7192_of_clock_select(struct ad7192_state *st) return clock_sel; } -static int ad7192_setup(struct iio_dev *indio_dev, struct device_node *np) +static int ad7192_setup(struct iio_dev *indio_dev, struct device *dev) { struct ad7192_state *st = iio_priv(indio_dev); bool rej60_en, refin2_en; @@ -407,7 +409,7 @@ static int ad7192_setup(struct iio_dev *indio_dev, struct device_node *np) id = FIELD_GET(AD7192_ID_MASK, id); if (id != st->chip_info->chip_id) - dev_warn(&st->sd.spi->dev, "device ID query failed (0x%X != 0x%X)\n", + dev_warn(dev, "device ID query failed (0x%X != 0x%X)\n", id, st->chip_info->chip_id); st->mode = FIELD_PREP(AD7192_MODE_SEL_MASK, AD7192_MODE_IDLE) | @@ -416,30 +418,30 @@ static int ad7192_setup(struct iio_dev *indio_dev, struct device_node *np) st->conf = FIELD_PREP(AD7192_CONF_GAIN_MASK, 0); - rej60_en = of_property_read_bool(np, "adi,rejection-60-Hz-enable"); + rej60_en = device_property_read_bool(dev, "adi,rejection-60-Hz-enable"); if (rej60_en) st->mode |= AD7192_MODE_REJ60; - refin2_en = of_property_read_bool(np, "adi,refin2-pins-enable"); + refin2_en = device_property_read_bool(dev, "adi,refin2-pins-enable"); if (refin2_en && st->chip_info->chip_id != CHIPID_AD7195) st->conf |= AD7192_CONF_REFSEL; st->conf &= ~AD7192_CONF_CHOP; - buf_en = of_property_read_bool(np, "adi,buffer-enable"); + buf_en = device_property_read_bool(dev, "adi,buffer-enable"); if (buf_en) st->conf |= AD7192_CONF_BUF; - bipolar = of_property_read_bool(np, "bipolar"); + bipolar = device_property_read_bool(dev, "bipolar"); if (!bipolar) st->conf |= AD7192_CONF_UNIPOLAR; - burnout_curr_en = of_property_read_bool(np, - "adi,burnout-currents-enable"); + burnout_curr_en = device_property_read_bool(dev, + "adi,burnout-currents-enable"); if (burnout_curr_en && buf_en) { st->conf |= AD7192_CONF_BURN; } else if (burnout_curr_en) { - dev_warn(&st->sd.spi->dev, + dev_warn(dev, "Can't enable burnout currents: see CHOP or buffer\n"); } @@ -1117,9 +1119,7 @@ static int ad7192_probe(struct spi_device *spi) } st->int_vref_mv = ret / 1000; - st->chip_info = of_device_get_match_data(&spi->dev); - if (!st->chip_info) - st->chip_info = (void *)spi_get_device_id(spi)->driver_data; + st->chip_info = spi_get_device_match_data(spi); indio_dev->name = st->chip_info->name; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = st->chip_info->channels; @@ -1140,7 +1140,7 @@ static int ad7192_probe(struct spi_device *spi) if (IS_ERR(st->mclk)) return PTR_ERR(st->mclk); - st->clock_sel = ad7192_of_clock_select(st); + st->clock_sel = ad7192_clock_select(st); if (st->clock_sel == AD7192_CLK_EXT_MCLK1_2 || st->clock_sel == AD7192_CLK_EXT_MCLK2) { @@ -1152,7 +1152,7 @@ static int ad7192_probe(struct spi_device *spi) } } - ret = ad7192_setup(indio_dev, spi->dev.of_node); + ret = ad7192_setup(indio_dev, &spi->dev); if (ret) return ret; diff --git a/drivers/iio/adc/ad7292.c b/drivers/iio/adc/ad7292.c index cccacec5db6d22..6aadd14f459dfe 100644 --- a/drivers/iio/adc/ad7292.c +++ b/drivers/iio/adc/ad7292.c @@ -8,7 +8,8 @@ #include <linux/bitfield.h> #include <linux/device.h> #include <linux/module.h> -#include <linux/of.h> +#include <linux/mod_devicetable.h> +#include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/spi/spi.h> @@ -260,7 +261,6 @@ static int ad7292_probe(struct spi_device *spi) { struct ad7292_state *st; struct iio_dev *indio_dev; - struct device_node *child; bool diff_channels = false; int ret; @@ -305,12 +305,11 @@ static int ad7292_probe(struct spi_device *spi) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &ad7292_info; - for_each_available_child_of_node(spi->dev.of_node, child) { - diff_channels = of_property_read_bool(child, "diff-channels"); - if (diff_channels) { - of_node_put(child); + device_for_each_child_node_scoped(&spi->dev, child) { + diff_channels = fwnode_property_read_bool(child, + "diff-channels"); + if (diff_channels) break; - } } if (diff_channels) { diff --git a/drivers/iio/adc/ad7944.c b/drivers/iio/adc/ad7944.c new file mode 100644 index 00000000000000..4af574ffa8641b --- /dev/null +++ b/drivers/iio/adc/ad7944.c @@ -0,0 +1,524 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Analog Devices AD7944/85/86 PulSAR ADC family driver. + * + * Copyright 2024 Analog Devices, Inc. + * Copyright 2024 BayLibre, SAS + */ + +#include <linux/bitfield.h> +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> +#include <linux/string_helpers.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> + +#define AD7944_INTERNAL_REF_MV 4096 + +struct ad7944_timing_spec { + /* Normal mode max conversion time (t_{CONV}). */ + unsigned int conv_ns; + /* TURBO mode max conversion time (t_{CONV}). */ + unsigned int turbo_conv_ns; +}; + +enum ad7944_spi_mode { + /* datasheet calls this "4-wire mode" */ + AD7944_SPI_MODE_DEFAULT, + /* datasheet calls this "3-wire mode" (not related to SPI_3WIRE!) */ + AD7944_SPI_MODE_SINGLE, + /* datasheet calls this "chain mode" */ + AD7944_SPI_MODE_CHAIN, +}; + +/* maps adi,spi-mode property value to enum */ +static const char * const ad7944_spi_modes[] = { + [AD7944_SPI_MODE_DEFAULT] = "", + [AD7944_SPI_MODE_SINGLE] = "single", + [AD7944_SPI_MODE_CHAIN] = "chain", +}; + +struct ad7944_adc { + struct spi_device *spi; + enum ad7944_spi_mode spi_mode; + struct spi_transfer xfers[3]; + struct spi_message msg; + /* Chip-specific timing specifications. */ + const struct ad7944_timing_spec *timing_spec; + /* GPIO connected to CNV pin. */ + struct gpio_desc *cnv; + /* Optional GPIO to enable turbo mode. */ + struct gpio_desc *turbo; + /* Indicates TURBO is hard-wired to be always enabled. */ + bool always_turbo; + /* Reference voltage (millivolts). */ + unsigned int ref_mv; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + struct { + union { + u16 u16; + u32 u32; + } raw; + u64 timestamp __aligned(8); + } sample __aligned(IIO_DMA_MINALIGN); +}; + +/* quite time before CNV rising edge */ +#define T_QUIET_NS 20 + +static const struct ad7944_timing_spec ad7944_timing_spec = { + .conv_ns = 420, + .turbo_conv_ns = 320, +}; + +static const struct ad7944_timing_spec ad7986_timing_spec = { + .conv_ns = 500, + .turbo_conv_ns = 400, +}; + +struct ad7944_chip_info { + const char *name; + const struct ad7944_timing_spec *timing_spec; + const struct iio_chan_spec channels[2]; +}; + +/* + * AD7944_DEFINE_CHIP_INFO - Define a chip info structure for a specific chip + * @_name: The name of the chip + * @_ts: The timing specification for the chip + * @_bits: The number of bits in the conversion result + * @_diff: Whether the chip is true differential or not + */ +#define AD7944_DEFINE_CHIP_INFO(_name, _ts, _bits, _diff) \ +static const struct ad7944_chip_info _name##_chip_info = { \ + .name = #_name, \ + .timing_spec = &_ts##_timing_spec, \ + .channels = { \ + { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .differential = _diff, \ + .channel = 0, \ + .channel2 = _diff ? 1 : 0, \ + .scan_index = 0, \ + .scan_type.sign = _diff ? 's' : 'u', \ + .scan_type.realbits = _bits, \ + .scan_type.storagebits = _bits > 16 ? 32 : 16, \ + .scan_type.endianness = IIO_CPU, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \ + | BIT(IIO_CHAN_INFO_SCALE), \ + }, \ + IIO_CHAN_SOFT_TIMESTAMP(1), \ + }, \ +} + +/* pseudo-differential with ground sense */ +AD7944_DEFINE_CHIP_INFO(ad7944, ad7944, 14, 0); +AD7944_DEFINE_CHIP_INFO(ad7985, ad7944, 16, 0); +/* fully differential */ +AD7944_DEFINE_CHIP_INFO(ad7986, ad7986, 18, 1); + +static void ad7944_unoptimize_msg(void *msg) +{ + spi_unoptimize_message(msg); +} + +static int ad7944_3wire_cs_mode_init_msg(struct device *dev, struct ad7944_adc *adc, + const struct iio_chan_spec *chan) +{ + unsigned int t_conv_ns = adc->always_turbo ? adc->timing_spec->turbo_conv_ns + : adc->timing_spec->conv_ns; + struct spi_transfer *xfers = adc->xfers; + int ret; + + /* + * NB: can get better performance from some SPI controllers if we use + * the same bits_per_word in every transfer. + */ + xfers[0].bits_per_word = chan->scan_type.realbits; + /* + * CS is tied to CNV and we need a low to high transition to start the + * conversion, so place CNV low for t_QUIET to prepare for this. + */ + xfers[0].delay.value = T_QUIET_NS; + xfers[0].delay.unit = SPI_DELAY_UNIT_NSECS; + + /* + * CS has to be high for full conversion time to avoid triggering the + * busy indication. + */ + xfers[1].cs_off = 1; + xfers[1].delay.value = t_conv_ns; + xfers[1].delay.unit = SPI_DELAY_UNIT_NSECS; + xfers[1].bits_per_word = chan->scan_type.realbits; + + /* Then we can read the data during the acquisition phase */ + xfers[2].rx_buf = &adc->sample.raw; + xfers[2].len = BITS_TO_BYTES(chan->scan_type.storagebits); + xfers[2].bits_per_word = chan->scan_type.realbits; + + spi_message_init_with_transfers(&adc->msg, xfers, 3); + + ret = spi_optimize_message(adc->spi, &adc->msg); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, ad7944_unoptimize_msg, &adc->msg); +} + +static int ad7944_4wire_mode_init_msg(struct device *dev, struct ad7944_adc *adc, + const struct iio_chan_spec *chan) +{ + unsigned int t_conv_ns = adc->always_turbo ? adc->timing_spec->turbo_conv_ns + : adc->timing_spec->conv_ns; + struct spi_transfer *xfers = adc->xfers; + int ret; + + /* + * NB: can get better performance from some SPI controllers if we use + * the same bits_per_word in every transfer. + */ + xfers[0].bits_per_word = chan->scan_type.realbits; + /* + * CS has to be high for full conversion time to avoid triggering the + * busy indication. + */ + xfers[0].cs_off = 1; + xfers[0].delay.value = t_conv_ns; + xfers[0].delay.unit = SPI_DELAY_UNIT_NSECS; + + xfers[1].rx_buf = &adc->sample.raw; + xfers[1].len = BITS_TO_BYTES(chan->scan_type.storagebits); + xfers[1].bits_per_word = chan->scan_type.realbits; + + spi_message_init_with_transfers(&adc->msg, xfers, 2); + + ret = spi_optimize_message(adc->spi, &adc->msg); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, ad7944_unoptimize_msg, &adc->msg); +} + +/** + * ad7944_convert_and_acquire - Perform a single conversion and acquisition + * @adc: The ADC device structure + * @chan: The channel specification + * Return: 0 on success, a negative error code on failure + * + * Perform a conversion and acquisition of a single sample using the + * pre-optimized adc->msg. + * + * Upon successful return adc->sample.raw will contain the conversion result. + */ +static int ad7944_convert_and_acquire(struct ad7944_adc *adc, + const struct iio_chan_spec *chan) +{ + int ret; + + /* + * In 4-wire mode, the CNV line is held high for the entire conversion + * and acquisition process. In other modes adc->cnv is NULL and is + * ignored (CS is wired to CNV in those cases). + */ + gpiod_set_value_cansleep(adc->cnv, 1); + ret = spi_sync(adc->spi, &adc->msg); + gpiod_set_value_cansleep(adc->cnv, 0); + + return ret; +} + +static int ad7944_single_conversion(struct ad7944_adc *adc, + const struct iio_chan_spec *chan, + int *val) +{ + int ret; + + ret = ad7944_convert_and_acquire(adc, chan); + if (ret) + return ret; + + if (chan->scan_type.storagebits > 16) + *val = adc->sample.raw.u32; + else + *val = adc->sample.raw.u16; + + if (chan->scan_type.sign == 's') + *val = sign_extend32(*val, chan->scan_type.realbits - 1); + + return IIO_VAL_INT; +} + +static int ad7944_read_raw(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + int *val, int *val2, long info) +{ + struct ad7944_adc *adc = iio_priv(indio_dev); + int ret; + + switch (info) { + case IIO_CHAN_INFO_RAW: + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + + ret = ad7944_single_conversion(adc, chan, val); + iio_device_release_direct_mode(indio_dev); + return ret; + + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_VOLTAGE: + *val = adc->ref_mv; + + if (chan->scan_type.sign == 's') + *val2 = chan->scan_type.realbits - 1; + else + *val2 = chan->scan_type.realbits; + + return IIO_VAL_FRACTIONAL_LOG2; + default: + return -EINVAL; + } + + default: + return -EINVAL; + } +} + +static const struct iio_info ad7944_iio_info = { + .read_raw = &ad7944_read_raw, +}; + +static irqreturn_t ad7944_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ad7944_adc *adc = iio_priv(indio_dev); + int ret; + + ret = ad7944_convert_and_acquire(adc, &indio_dev->channels[0]); + if (ret) + goto out; + + iio_push_to_buffers_with_timestamp(indio_dev, &adc->sample.raw, + pf->timestamp); + +out: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static const char * const ad7944_power_supplies[] = { + "avdd", "dvdd", "bvdd", "vio" +}; + +static void ad7944_ref_disable(void *ref) +{ + regulator_disable(ref); +} + +static int ad7944_probe(struct spi_device *spi) +{ + const struct ad7944_chip_info *chip_info; + struct device *dev = &spi->dev; + struct iio_dev *indio_dev; + struct ad7944_adc *adc; + bool have_refin = false; + struct regulator *ref; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*adc)); + if (!indio_dev) + return -ENOMEM; + + adc = iio_priv(indio_dev); + adc->spi = spi; + + chip_info = spi_get_device_match_data(spi); + if (!chip_info) + return dev_err_probe(dev, -EINVAL, "no chip info\n"); + + adc->timing_spec = chip_info->timing_spec; + + ret = device_property_match_property_string(dev, "adi,spi-mode", + ad7944_spi_modes, + ARRAY_SIZE(ad7944_spi_modes)); + /* absence of adi,spi-mode property means default mode */ + if (ret == -EINVAL) + adc->spi_mode = AD7944_SPI_MODE_DEFAULT; + else if (ret < 0) + return dev_err_probe(dev, ret, + "getting adi,spi-mode property failed\n"); + else + adc->spi_mode = ret; + + /* + * Some chips use unusual word sizes, so check now instead of waiting + * for the first xfer. + */ + if (!spi_is_bpw_supported(spi, chip_info->channels[0].scan_type.realbits)) + return dev_err_probe(dev, -EINVAL, + "SPI host does not support %d bits per word\n", + chip_info->channels[0].scan_type.realbits); + + ret = devm_regulator_bulk_get_enable(dev, + ARRAY_SIZE(ad7944_power_supplies), + ad7944_power_supplies); + if (ret) + return dev_err_probe(dev, ret, + "failed to get and enable supplies\n"); + + /* + * Sort out what is being used for the reference voltage. Options are: + * - internal reference: neither REF or REFIN is connected + * - internal reference with external buffer: REF not connected, REFIN + * is connected + * - external reference: REF is connected, REFIN is not connected + */ + + ref = devm_regulator_get_optional(dev, "ref"); + if (IS_ERR(ref)) { + if (PTR_ERR(ref) != -ENODEV) + return dev_err_probe(dev, PTR_ERR(ref), + "failed to get REF supply\n"); + + ref = NULL; + } + + ret = devm_regulator_get_enable_optional(dev, "refin"); + if (ret == 0) + have_refin = true; + else if (ret != -ENODEV) + return dev_err_probe(dev, ret, + "failed to get and enable REFIN supply\n"); + + if (have_refin && ref) + return dev_err_probe(dev, -EINVAL, + "cannot have both refin and ref supplies\n"); + + if (ref) { + ret = regulator_enable(ref); + if (ret) + return dev_err_probe(dev, ret, + "failed to enable REF supply\n"); + + ret = devm_add_action_or_reset(dev, ad7944_ref_disable, ref); + if (ret) + return ret; + + ret = regulator_get_voltage(ref); + if (ret < 0) + return dev_err_probe(dev, ret, + "failed to get REF voltage\n"); + + /* external reference */ + adc->ref_mv = ret / 1000; + } else { + /* internal reference */ + adc->ref_mv = AD7944_INTERNAL_REF_MV; + } + + adc->cnv = devm_gpiod_get_optional(dev, "cnv", GPIOD_OUT_LOW); + if (IS_ERR(adc->cnv)) + return dev_err_probe(dev, PTR_ERR(adc->cnv), + "failed to get CNV GPIO\n"); + + if (!adc->cnv && adc->spi_mode == AD7944_SPI_MODE_DEFAULT) + return dev_err_probe(&spi->dev, -EINVAL, "CNV GPIO is required\n"); + if (adc->cnv && adc->spi_mode != AD7944_SPI_MODE_DEFAULT) + return dev_err_probe(&spi->dev, -EINVAL, + "CNV GPIO in single and chain mode is not currently supported\n"); + + adc->turbo = devm_gpiod_get_optional(dev, "turbo", GPIOD_OUT_LOW); + if (IS_ERR(adc->turbo)) + return dev_err_probe(dev, PTR_ERR(adc->turbo), + "failed to get TURBO GPIO\n"); + + adc->always_turbo = device_property_present(dev, "adi,always-turbo"); + + if (adc->turbo && adc->always_turbo) + return dev_err_probe(dev, -EINVAL, + "cannot have both turbo-gpios and adi,always-turbo\n"); + + if (adc->spi_mode == AD7944_SPI_MODE_CHAIN && adc->always_turbo) + return dev_err_probe(dev, -EINVAL, + "cannot have both chain mode and always turbo\n"); + + switch (adc->spi_mode) { + case AD7944_SPI_MODE_DEFAULT: + ret = ad7944_4wire_mode_init_msg(dev, adc, &chip_info->channels[0]); + if (ret) + return ret; + + break; + case AD7944_SPI_MODE_SINGLE: + ret = ad7944_3wire_cs_mode_init_msg(dev, adc, &chip_info->channels[0]); + if (ret) + return ret; + + break; + case AD7944_SPI_MODE_CHAIN: + return dev_err_probe(dev, -EINVAL, "chain mode is not implemented\n"); + } + + indio_dev->name = chip_info->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &ad7944_iio_info; + indio_dev->channels = chip_info->channels; + indio_dev->num_channels = ARRAY_SIZE(chip_info->channels); + + ret = devm_iio_triggered_buffer_setup(dev, indio_dev, + iio_pollfunc_store_time, + ad7944_trigger_handler, NULL); + if (ret) + return ret; + + return devm_iio_device_register(dev, indio_dev); +} + +static const struct of_device_id ad7944_of_match[] = { + { .compatible = "adi,ad7944", .data = &ad7944_chip_info }, + { .compatible = "adi,ad7985", .data = &ad7985_chip_info }, + { .compatible = "adi,ad7986", .data = &ad7986_chip_info }, + { } +}; +MODULE_DEVICE_TABLE(of, ad7944_of_match); + +static const struct spi_device_id ad7944_spi_id[] = { + { "ad7944", (kernel_ulong_t)&ad7944_chip_info }, + { "ad7985", (kernel_ulong_t)&ad7985_chip_info }, + { "ad7986", (kernel_ulong_t)&ad7986_chip_info }, + { } + +}; +MODULE_DEVICE_TABLE(spi, ad7944_spi_id); + +static struct spi_driver ad7944_driver = { + .driver = { + .name = "ad7944", + .of_match_table = ad7944_of_match, + }, + .probe = ad7944_probe, + .id_table = ad7944_spi_id, +}; +module_spi_driver(ad7944_driver); + +MODULE_AUTHOR("David Lechner <dlechner@baylibre.com>"); +MODULE_DESCRIPTION("Analog Devices AD7944 PulSAR ADC family driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c index a602429cdde4ef..97a05f325df7cf 100644 --- a/drivers/iio/adc/ad_sigma_delta.c +++ b/drivers/iio/adc/ad_sigma_delta.c @@ -222,11 +222,11 @@ int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta, goto out; sigma_delta->irq_dis = false; - enable_irq(sigma_delta->spi->irq); + enable_irq(sigma_delta->irq_line); timeout = wait_for_completion_timeout(&sigma_delta->completion, 2 * HZ); if (timeout == 0) { sigma_delta->irq_dis = true; - disable_irq_nosync(sigma_delta->spi->irq); + disable_irq_nosync(sigma_delta->irq_line); ret = -EIO; } else { ret = 0; @@ -295,7 +295,7 @@ int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev, ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_SINGLE); sigma_delta->irq_dis = false; - enable_irq(sigma_delta->spi->irq); + enable_irq(sigma_delta->irq_line); ret = wait_for_completion_interruptible_timeout( &sigma_delta->completion, HZ); @@ -315,7 +315,7 @@ int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev, out: if (!sigma_delta->irq_dis) { - disable_irq_nosync(sigma_delta->spi->irq); + disable_irq_nosync(sigma_delta->irq_line); sigma_delta->irq_dis = true; } @@ -396,7 +396,7 @@ static int ad_sd_buffer_postenable(struct iio_dev *indio_dev) goto err_unlock; sigma_delta->irq_dis = false; - enable_irq(sigma_delta->spi->irq); + enable_irq(sigma_delta->irq_line); return 0; @@ -414,7 +414,7 @@ static int ad_sd_buffer_postdisable(struct iio_dev *indio_dev) wait_for_completion_timeout(&sigma_delta->completion, HZ); if (!sigma_delta->irq_dis) { - disable_irq_nosync(sigma_delta->spi->irq); + disable_irq_nosync(sigma_delta->irq_line); sigma_delta->irq_dis = true; } @@ -516,7 +516,7 @@ static irqreturn_t ad_sd_trigger_handler(int irq, void *p) irq_handled: iio_trigger_notify_done(indio_dev->trig); sigma_delta->irq_dis = false; - enable_irq(sigma_delta->spi->irq); + enable_irq(sigma_delta->irq_line); return IRQ_HANDLED; } @@ -587,13 +587,13 @@ static int devm_ad_sd_probe_trigger(struct device *dev, struct iio_dev *indio_de sigma_delta->irq_dis = true; /* the IRQ core clears IRQ_DISABLE_UNLAZY flag when freeing an IRQ */ - irq_set_status_flags(sigma_delta->spi->irq, IRQ_DISABLE_UNLAZY); + irq_set_status_flags(sigma_delta->irq_line, IRQ_DISABLE_UNLAZY); /* Allow overwriting the flags from firmware */ if (!irq_flags) irq_flags = sigma_delta->info->irq_flags; - ret = devm_request_irq(dev, sigma_delta->spi->irq, + ret = devm_request_irq(dev, sigma_delta->irq_line, ad_sd_data_rdy_trig_poll, irq_flags | IRQF_NO_AUTOEN, indio_dev->name, @@ -673,6 +673,11 @@ int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev, } } + if (info->irq_line) + sigma_delta->irq_line = info->irq_line; + else + sigma_delta->irq_line = spi->irq; + iio_device_set_drvdata(indio_dev, sigma_delta); return 0; diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c index 4156639b3c8bdb..9444b0c5a93c6a 100644 --- a/drivers/iio/adc/adi-axi-adc.c +++ b/drivers/iio/adc/adi-axi-adc.c @@ -124,26 +124,12 @@ static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back, struct iio_dev *indio_dev) { struct adi_axi_adc_state *st = iio_backend_get_priv(back); - struct iio_buffer *buffer; const char *dma_name; - int ret; if (device_property_read_string(st->dev, "dma-names", &dma_name)) dma_name = "rx"; - buffer = iio_dmaengine_buffer_alloc(st->dev, dma_name); - if (IS_ERR(buffer)) { - dev_err(st->dev, "Could not get DMA buffer, %ld\n", - PTR_ERR(buffer)); - return ERR_CAST(buffer); - } - - indio_dev->modes |= INDIO_BUFFER_HARDWARE; - ret = iio_device_attach_buffer(indio_dev, buffer); - if (ret) - return ERR_PTR(ret); - - return buffer; + return iio_dmaengine_buffer_setup(st->dev, indio_dev, dma_name); } static void axi_adc_free_buffer(struct iio_backend *back, @@ -207,9 +193,9 @@ static int adi_axi_adc_probe(struct platform_device *pdev) if (ret) return ret; - if (*expected_ver > ver) { + if (ADI_AXI_PCORE_VER_MAJOR(ver) != ADI_AXI_PCORE_VER_MAJOR(*expected_ver)) { dev_err(&pdev->dev, - "IP core version is too old. Expected %d.%.2d.%c, Reported %d.%.2d.%c\n", + "Major version mismatch. Expected %d.%.2d.%c, Reported %d.%.2d.%c\n", ADI_AXI_PCORE_VER_MAJOR(*expected_ver), ADI_AXI_PCORE_VER_MINOR(*expected_ver), ADI_AXI_PCORE_VER_PATCH(*expected_ver), diff --git a/drivers/iio/adc/fsl-imx25-gcq.c b/drivers/iio/adc/fsl-imx25-gcq.c index 68c813de0605bc..394396b916309e 100644 --- a/drivers/iio/adc/fsl-imx25-gcq.c +++ b/drivers/iio/adc/fsl-imx25-gcq.c @@ -12,8 +12,9 @@ #include <linux/interrupt.h> #include <linux/mfd/imx25-tsadc.h> #include <linux/module.h> -#include <linux/of.h> +#include <linux/mod_devicetable.h> #include <linux/platform_device.h> +#include <linux/property.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> @@ -198,8 +199,6 @@ static int mx25_gcq_ext_regulator_setup(struct device *dev, static int mx25_gcq_setup_cfgs(struct platform_device *pdev, struct mx25_gcq_priv *priv) { - struct device_node *np = pdev->dev.of_node; - struct device_node *child; struct device *dev = &pdev->dev; int ret, i; @@ -216,37 +215,30 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev, MX25_ADCQ_CFG_IN(i) | MX25_ADCQ_CFG_REFN_NGND2); - for_each_child_of_node(np, child) { + device_for_each_child_node_scoped(dev, child) { u32 reg; u32 refp = MX25_ADCQ_CFG_REFP_INT; u32 refn = MX25_ADCQ_CFG_REFN_NGND2; - ret = of_property_read_u32(child, "reg", ®); - if (ret) { - dev_err(dev, "Failed to get reg property\n"); - of_node_put(child); - return ret; - } + ret = fwnode_property_read_u32(child, "reg", ®); + if (ret) + return dev_err_probe(dev, ret, + "Failed to get reg property\n"); - if (reg >= MX25_NUM_CFGS) { - dev_err(dev, + if (reg >= MX25_NUM_CFGS) + return dev_err_probe(dev, -EINVAL, "reg value is greater than the number of available configuration registers\n"); - of_node_put(child); - return -EINVAL; - } - of_property_read_u32(child, "fsl,adc-refp", &refp); - of_property_read_u32(child, "fsl,adc-refn", &refn); + fwnode_property_read_u32(child, "fsl,adc-refp", &refp); + fwnode_property_read_u32(child, "fsl,adc-refn", &refn); switch (refp) { case MX25_ADC_REFP_EXT: case MX25_ADC_REFP_XP: case MX25_ADC_REFP_YP: ret = mx25_gcq_ext_regulator_setup(&pdev->dev, priv, refp); - if (ret) { - of_node_put(child); + if (ret) return ret; - } priv->channel_vref_mv[reg] = regulator_get_voltage(priv->vref[refp]); /* Conversion from uV to mV */ @@ -256,9 +248,8 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev, priv->channel_vref_mv[reg] = 2500; break; default: - dev_err(dev, "Invalid positive reference %d\n", refp); - of_node_put(child); - return -EINVAL; + return dev_err_probe(dev, -EINVAL, + "Invalid positive reference %d\n", refp); } /* @@ -268,16 +259,13 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev, refp = MX25_ADCQ_CFG_REFP(refp); refn = MX25_ADCQ_CFG_REFN(refn); - if ((refp & MX25_ADCQ_CFG_REFP_MASK) != refp) { - dev_err(dev, "Invalid fsl,adc-refp property value\n"); - of_node_put(child); - return -EINVAL; - } - if ((refn & MX25_ADCQ_CFG_REFN_MASK) != refn) { - dev_err(dev, "Invalid fsl,adc-refn property value\n"); - of_node_put(child); - return -EINVAL; - } + if ((refp & MX25_ADCQ_CFG_REFP_MASK) != refp) + return dev_err_probe(dev, -EINVAL, + "Invalid fsl,adc-refp property value\n"); + + if ((refn & MX25_ADCQ_CFG_REFN_MASK) != refn) + return dev_err_probe(dev, -EINVAL, + "Invalid fsl,adc-refn property value\n"); regmap_update_bits(priv->regs, MX25_ADCQ_CFG(reg), MX25_ADCQ_CFG_REFP_MASK | @@ -294,6 +282,17 @@ static int mx25_gcq_setup_cfgs(struct platform_device *pdev, return 0; } +static void mx25_gcq_reg_disable(void *reg) +{ + regulator_disable(reg); +} + +/* Custom handling needed as this driver doesn't own the clock */ +static void mx25_gcq_clk_disable(void *clk) +{ + clk_disable_unprepare(clk); +} + static int mx25_gcq_probe(struct platform_device *pdev) { struct iio_dev *indio_dev; @@ -315,10 +314,9 @@ static int mx25_gcq_probe(struct platform_device *pdev) return PTR_ERR(mem); priv->regs = devm_regmap_init_mmio(dev, mem, &mx25_gcq_regconfig); - if (IS_ERR(priv->regs)) { - dev_err(dev, "Failed to initialize regmap\n"); - return PTR_ERR(priv->regs); - } + if (IS_ERR(priv->regs)) + return dev_err_probe(dev, PTR_ERR(priv->regs), + "Failed to initialize regmap\n"); mutex_init(&priv->lock); @@ -334,69 +332,44 @@ static int mx25_gcq_probe(struct platform_device *pdev) ret = regulator_enable(priv->vref[i]); if (ret) - goto err_regulator_disable; + return ret; + + ret = devm_add_action_or_reset(dev, mx25_gcq_reg_disable, + priv->vref[i]); + if (ret) + return ret; } priv->clk = tsadc->clk; ret = clk_prepare_enable(priv->clk); - if (ret) { - dev_err(dev, "Failed to enable clock\n"); - goto err_vref_disable; - } + if (ret) + return dev_err_probe(dev, ret, "Failed to enable clock\n"); + + ret = devm_add_action_or_reset(dev, mx25_gcq_clk_disable, + priv->clk); + if (ret) + return ret; ret = platform_get_irq(pdev, 0); if (ret < 0) - goto err_clk_unprepare; + return ret; priv->irq = ret; - ret = request_irq(priv->irq, mx25_gcq_irq, 0, pdev->name, priv); - if (ret) { - dev_err(dev, "Failed requesting IRQ\n"); - goto err_clk_unprepare; - } + ret = devm_request_irq(dev, priv->irq, mx25_gcq_irq, 0, pdev->name, + priv); + if (ret) + return dev_err_probe(dev, ret, "Failed requesting IRQ\n"); indio_dev->channels = mx25_gcq_channels; indio_dev->num_channels = ARRAY_SIZE(mx25_gcq_channels); indio_dev->info = &mx25_gcq_iio_info; indio_dev->name = driver_name; - ret = iio_device_register(indio_dev); - if (ret) { - dev_err(dev, "Failed to register iio device\n"); - goto err_irq_free; - } - - platform_set_drvdata(pdev, indio_dev); + ret = devm_iio_device_register(dev, indio_dev); + if (ret) + return dev_err_probe(dev, ret, "Failed to register iio device\n"); return 0; - -err_irq_free: - free_irq(priv->irq, priv); -err_clk_unprepare: - clk_disable_unprepare(priv->clk); -err_vref_disable: - i = 4; -err_regulator_disable: - for (; i-- > 0;) { - if (priv->vref[i]) - regulator_disable(priv->vref[i]); - } - return ret; -} - -static void mx25_gcq_remove(struct platform_device *pdev) -{ - struct iio_dev *indio_dev = platform_get_drvdata(pdev); - struct mx25_gcq_priv *priv = iio_priv(indio_dev); - int i; - - iio_device_unregister(indio_dev); - free_irq(priv->irq, priv); - clk_disable_unprepare(priv->clk); - for (i = 4; i-- > 0;) { - if (priv->vref[i]) - regulator_disable(priv->vref[i]); - } } static const struct of_device_id mx25_gcq_ids[] = { @@ -411,7 +384,6 @@ static struct platform_driver mx25_gcq_driver = { .of_match_table = mx25_gcq_ids, }, .probe = mx25_gcq_probe, - .remove_new = mx25_gcq_remove, }; module_platform_driver(mx25_gcq_driver); diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c index c80c55fb8c6cea..fef97c1d226a55 100644 --- a/drivers/iio/adc/hx711.c +++ b/drivers/iio/adc/hx711.c @@ -7,7 +7,7 @@ #include <linux/err.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/of.h> +#include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/slab.h> @@ -459,7 +459,6 @@ static const struct iio_chan_spec hx711_chan_spec[] = { static int hx711_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; struct hx711_data *hx711_data; struct iio_dev *indio_dev; int ret; @@ -533,7 +532,7 @@ static int hx711_probe(struct platform_device *pdev) hx711_data->gain_chan_a = 128; hx711_data->clock_frequency = 400000; - ret = of_property_read_u32(np, "clock-frequency", + ret = device_property_read_u32(&pdev->dev, "clock-frequency", &hx711_data->clock_frequency); /* diff --git a/drivers/iio/adc/max11410.c b/drivers/iio/adc/max11410.c index 6af829349b4e1f..45368850b2201f 100644 --- a/drivers/iio/adc/max11410.c +++ b/drivers/iio/adc/max11410.c @@ -696,7 +696,6 @@ static int max11410_parse_channels(struct max11410_state *st, struct device *dev = &st->spi_dev->dev; struct max11410_channel_config *cfg; struct iio_chan_spec *channels; - struct fwnode_handle *child; u32 reference, sig_path; const char *node_name; u32 inputs[2], scale; @@ -720,7 +719,7 @@ static int max11410_parse_channels(struct max11410_state *st, if (!st->channels) return -ENOMEM; - device_for_each_child_node(dev, child) { + device_for_each_child_node_scoped(dev, child) { node_name = fwnode_get_name(child); if (fwnode_property_present(child, "diff-channels")) { ret = fwnode_property_read_u32_array(child, @@ -735,47 +734,37 @@ static int max11410_parse_channels(struct max11410_state *st, inputs[1] = 0; chanspec.differential = 0; } - if (ret) { - fwnode_handle_put(child); + if (ret) return ret; - } if (inputs[0] > MAX11410_CHANNEL_INDEX_MAX || - inputs[1] > MAX11410_CHANNEL_INDEX_MAX) { - fwnode_handle_put(child); + inputs[1] > MAX11410_CHANNEL_INDEX_MAX) return dev_err_probe(&indio_dev->dev, -EINVAL, "Invalid channel index for %s, should be less than %d\n", node_name, MAX11410_CHANNEL_INDEX_MAX + 1); - } cfg = &st->channels[chan_idx]; reference = MAX11410_REFSEL_AVDD_AGND; fwnode_property_read_u32(child, "adi,reference", &reference); - if (reference > MAX11410_REFSEL_MAX) { - fwnode_handle_put(child); + if (reference > MAX11410_REFSEL_MAX) return dev_err_probe(&indio_dev->dev, -EINVAL, "Invalid adi,reference value for %s, should be less than %d.\n", node_name, MAX11410_REFSEL_MAX + 1); - } if (!max11410_get_vrefp(st, reference) || - (!max11410_get_vrefn(st, reference) && reference <= 2)) { - fwnode_handle_put(child); + (!max11410_get_vrefn(st, reference) && reference <= 2)) return dev_err_probe(&indio_dev->dev, -EINVAL, "Invalid VREF configuration for %s, either specify corresponding VREF regulators or change adi,reference property.\n", node_name); - } sig_path = MAX11410_PGA_SIG_PATH_BUFFERED; fwnode_property_read_u32(child, "adi,input-mode", &sig_path); - if (sig_path > MAX11410_SIG_PATH_MAX) { - fwnode_handle_put(child); + if (sig_path > MAX11410_SIG_PATH_MAX) return dev_err_probe(&indio_dev->dev, -EINVAL, "Invalid adi,input-mode value for %s, should be less than %d.\n", node_name, MAX11410_SIG_PATH_MAX + 1); - } fwnode_property_read_u32(child, "settling-time-us", &cfg->settling_time_us); @@ -793,10 +782,8 @@ static int max11410_parse_channels(struct max11410_state *st, cfg->scale_avail = devm_kcalloc(dev, MAX11410_SCALE_AVAIL_SIZE * 2, sizeof(*cfg->scale_avail), GFP_KERNEL); - if (!cfg->scale_avail) { - fwnode_handle_put(child); + if (!cfg->scale_avail) return -ENOMEM; - } scale = max11410_get_scale(st, *cfg); for (i = 0; i < MAX11410_SCALE_AVAIL_SIZE; i++) { diff --git a/drivers/iio/adc/pac1934.c b/drivers/iio/adc/pac1934.c index e0c2742da5236f..f751260605e4e1 100644 --- a/drivers/iio/adc/pac1934.c +++ b/drivers/iio/adc/pac1934.c @@ -1079,8 +1079,8 @@ static int pac1934_chip_identify(struct pac1934_chip_info *info) * documentation related to the ACPI device definition * https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ApplicationNotes/ApplicationNotes/PAC1934-Integration-Notes-for-Microsoft-Windows-10-and-Windows-11-Driver-Support-DS00002534.pdf */ -static bool pac1934_acpi_parse_channel_config(struct i2c_client *client, - struct pac1934_chip_info *info) +static int pac1934_acpi_parse_channel_config(struct i2c_client *client, + struct pac1934_chip_info *info) { acpi_handle handle; union acpi_object *rez; @@ -1095,7 +1095,7 @@ static bool pac1934_acpi_parse_channel_config(struct i2c_client *client, rez = acpi_evaluate_dsm(handle, &guid, 0, PAC1934_ACPI_GET_NAMES_AND_MOHMS_VALS, NULL); if (!rez) - return false; + return -EINVAL; for (i = 0; i < rez->package.count; i += 2) { idx = i / 2; @@ -1118,7 +1118,7 @@ static bool pac1934_acpi_parse_channel_config(struct i2c_client *client, * and assign the default sampling rate */ info->sample_rate_value = PAC1934_DEFAULT_CHIP_SAMP_SPEED_HZ; - return true; + return 0; } for (i = 0; i < rez->package.count; i++) { @@ -1131,7 +1131,7 @@ static bool pac1934_acpi_parse_channel_config(struct i2c_client *client, rez = acpi_evaluate_dsm(handle, &guid, 1, PAC1934_ACPI_GET_BIPOLAR_SETTINGS, NULL); if (!rez) - return false; + return -EINVAL; bi_dir_mask = rez->package.elements[0].integer.value; info->bi_dir[0] = ((bi_dir_mask & (1 << 3)) | (bi_dir_mask & (1 << 7))) != 0; @@ -1143,19 +1143,18 @@ static bool pac1934_acpi_parse_channel_config(struct i2c_client *client, rez = acpi_evaluate_dsm(handle, &guid, 1, PAC1934_ACPI_GET_SAMP, NULL); if (!rez) - return false; + return -EINVAL; info->sample_rate_value = rez->package.elements[0].integer.value; ACPI_FREE(rez); - return true; + return 0; } -static bool pac1934_of_parse_channel_config(struct i2c_client *client, - struct pac1934_chip_info *info) +static int pac1934_fw_parse_channel_config(struct i2c_client *client, + struct pac1934_chip_info *info) { - struct fwnode_handle *node, *fwnode; struct device *dev = &client->dev; unsigned int current_channel; int idx, ret; @@ -1163,46 +1162,38 @@ static bool pac1934_of_parse_channel_config(struct i2c_client *client, info->sample_rate_value = 1024; current_channel = 1; - fwnode = dev_fwnode(dev); - fwnode_for_each_available_child_node(fwnode, node) { + device_for_each_child_node_scoped(dev, node) { ret = fwnode_property_read_u32(node, "reg", &idx); - if (ret) { - dev_err_probe(dev, ret, - "reading invalid channel index\n"); - goto err_fwnode; - } + if (ret) + return dev_err_probe(dev, ret, + "reading invalid channel index\n"); + /* adjust idx to match channel index (1 to 4) from the datasheet */ idx--; if (current_channel >= (info->phys_channels + 1) || - idx >= info->phys_channels || idx < 0) { - dev_err_probe(dev, -EINVAL, - "%s: invalid channel_index %d value\n", - fwnode_get_name(node), idx); - goto err_fwnode; - } + idx >= info->phys_channels || idx < 0) + return dev_err_probe(dev, -EINVAL, + "%s: invalid channel_index %d value\n", + fwnode_get_name(node), idx); /* enable channel */ info->active_channels[idx] = true; ret = fwnode_property_read_u32(node, "shunt-resistor-micro-ohms", &info->shunts[idx]); - if (ret) { - dev_err_probe(dev, ret, - "%s: invalid shunt-resistor value: %d\n", - fwnode_get_name(node), info->shunts[idx]); - goto err_fwnode; - } + if (ret) + return dev_err_probe(dev, ret, + "%s: invalid shunt-resistor value: %d\n", + fwnode_get_name(node), info->shunts[idx]); if (fwnode_property_present(node, "label")) { ret = fwnode_property_read_string(node, "label", (const char **)&info->labels[idx]); - if (ret) { - dev_err_probe(dev, ret, - "%s: invalid rail-name value\n", - fwnode_get_name(node)); - goto err_fwnode; - } + if (ret) + return dev_err_probe(dev, ret, + "%s: invalid rail-name value\n", + fwnode_get_name(node)); } info->bi_dir[idx] = fwnode_property_read_bool(node, "bipolar"); @@ -1210,12 +1201,7 @@ static bool pac1934_of_parse_channel_config(struct i2c_client *client, current_channel++; } - return true; - -err_fwnode: - fwnode_handle_put(node); - - return false; + return 0; } static void pac1934_cancel_delayed_work(void *dwork) @@ -1485,7 +1471,6 @@ static int pac1934_probe(struct i2c_client *client) const struct pac1934_features *chip; struct iio_dev *indio_dev; int cnt, ret; - bool match = false; struct device *dev = &client->dev; indio_dev = devm_iio_device_alloc(dev, sizeof(*info)); @@ -1519,16 +1504,16 @@ static int pac1934_probe(struct i2c_client *client) } if (acpi_match_device(dev->driver->acpi_match_table, dev)) - match = pac1934_acpi_parse_channel_config(client, info); + ret = pac1934_acpi_parse_channel_config(client, info); else /* * This makes it possible to use also ACPI PRP0001 for * registering the device using device tree properties. */ - match = pac1934_of_parse_channel_config(client, info); + ret = pac1934_fw_parse_channel_config(client, info); - if (!match) - return dev_err_probe(dev, -EINVAL, + if (ret) + return dev_err_probe(dev, ret, "parameter parsing returned an error\n"); mutex_init(&info->lock); diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c index b6b612d733ff23..9b69f40beed8ea 100644 --- a/drivers/iio/adc/qcom-spmi-adc5.c +++ b/drivers/iio/adc/qcom-spmi-adc5.c @@ -825,7 +825,6 @@ static int adc5_get_fw_data(struct adc5_chip *adc) const struct adc5_channels *adc_chan; struct iio_chan_spec *iio_chan; struct adc5_channel_prop prop, *chan_props; - struct fwnode_handle *child; unsigned int index = 0; int ret; @@ -849,12 +848,10 @@ static int adc5_get_fw_data(struct adc5_chip *adc) if (!adc->data) adc->data = &adc5_data_pmic; - device_for_each_child_node(adc->dev, child) { + device_for_each_child_node_scoped(adc->dev, child) { ret = adc5_get_fw_channel_data(adc, &prop, child, adc->data); - if (ret) { - fwnode_handle_put(child); + if (ret) return ret; - } prop.scale_fn_type = adc->data->adc_chans[prop.channel].scale_fn_type; diff --git a/drivers/iio/adc/rcar-gyroadc.c b/drivers/iio/adc/rcar-gyroadc.c index d524f2e8e92775..15a21d2860e758 100644 --- a/drivers/iio/adc/rcar-gyroadc.c +++ b/drivers/iio/adc/rcar-gyroadc.c @@ -318,7 +318,6 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) struct rcar_gyroadc *priv = iio_priv(indio_dev); struct device *dev = priv->dev; struct device_node *np = dev->of_node; - struct device_node *child; struct regulator *vref; unsigned int reg; unsigned int adcmode = -1, childmode; @@ -326,7 +325,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) unsigned int num_channels; int ret, first = 1; - for_each_child_of_node(np, child) { + for_each_available_child_of_node_scoped(np, child) { of_id = of_match_node(rcar_gyroadc_child_match, child); if (!of_id) { dev_err(dev, "Ignoring unsupported ADC \"%pOFn\".", @@ -352,7 +351,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) num_channels = ARRAY_SIZE(rcar_gyroadc_iio_channels_3); break; default: - goto err_e_inval; + return -EINVAL; } /* @@ -369,7 +368,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) dev_err(dev, "Failed to get child reg property of ADC \"%pOFn\".\n", child); - goto err_of_node_put; + return ret; } /* Channel number is too high. */ @@ -377,7 +376,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) dev_err(dev, "Only %i channels supported with %pOFn, but reg = <%i>.\n", num_channels, child, reg); - goto err_e_inval; + return -EINVAL; } } @@ -386,7 +385,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) dev_err(dev, "Channel %i uses different ADC mode than the rest.\n", reg); - goto err_e_inval; + return -EINVAL; } /* Channel is valid, grab the regulator. */ @@ -396,8 +395,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) if (IS_ERR(vref)) { dev_dbg(dev, "Channel %i 'vref' supply not connected.\n", reg); - ret = PTR_ERR(vref); - goto err_of_node_put; + return PTR_ERR(vref); } priv->vref[reg] = vref; @@ -422,7 +420,6 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) * we can stop parsing here. */ if (childmode == RCAR_GYROADC_MODE_SELECT_1_MB88101A) { - of_node_put(child); break; } } @@ -433,12 +430,6 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) } return 0; - -err_e_inval: - ret = -EINVAL; -err_of_node_put: - of_node_put(child); - return ret; } static void rcar_gyroadc_deinit_supplies(struct iio_dev *indio_dev) diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c index 0921ff2d9b3a10..cd3a7e46ea53c0 100644 --- a/drivers/iio/adc/rzg2l_adc.c +++ b/drivers/iio/adc/rzg2l_adc.c @@ -302,7 +302,6 @@ static irqreturn_t rzg2l_adc_isr(int irq, void *dev_id) static int rzg2l_adc_parse_properties(struct platform_device *pdev, struct rzg2l_adc *adc) { struct iio_chan_spec *chan_array; - struct fwnode_handle *fwnode; struct rzg2l_adc_data *data; unsigned int channel; int num_channels; @@ -330,17 +329,13 @@ static int rzg2l_adc_parse_properties(struct platform_device *pdev, struct rzg2l return -ENOMEM; i = 0; - device_for_each_child_node(&pdev->dev, fwnode) { + device_for_each_child_node_scoped(&pdev->dev, fwnode) { ret = fwnode_property_read_u32(fwnode, "reg", &channel); - if (ret) { - fwnode_handle_put(fwnode); + if (ret) return ret; - } - if (channel >= RZG2L_ADC_MAX_CHANNELS) { - fwnode_handle_put(fwnode); + if (channel >= RZG2L_ADC_MAX_CHANNELS) return -EINVAL; - } chan_array[i].type = IIO_VOLTAGE; chan_array[i].indexed = 1; diff --git a/drivers/iio/adc/spear_adc.c b/drivers/iio/adc/spear_adc.c index 71362c2ddf897d..b6dd096391c11a 100644 --- a/drivers/iio/adc/spear_adc.c +++ b/drivers/iio/adc/spear_adc.c @@ -5,8 +5,10 @@ * Copyright 2012 Stefan Roese <sr@denx.de> */ +#include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/property.h> #include <linux/interrupt.h> #include <linux/device.h> #include <linux/kernel.h> @@ -15,8 +17,6 @@ #include <linux/clk.h> #include <linux/err.h> #include <linux/completion.h> -#include <linux/of.h> -#include <linux/of_address.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> @@ -70,7 +70,7 @@ struct adc_regs_spear6xx { }; struct spear_adc_state { - struct device_node *np; + struct device *dev; struct adc_regs_spear3xx __iomem *adc_base_spear3xx; struct adc_regs_spear6xx __iomem *adc_base_spear6xx; struct clk *clk; @@ -123,7 +123,7 @@ static void spear_adc_set_ctrl(struct spear_adc_state *st, int n, static u32 spear_adc_get_average(struct spear_adc_state *st) { - if (of_device_is_compatible(st->np, "st,spear600-adc")) { + if (device_is_compatible(st->dev, "st,spear600-adc")) { return __raw_readl(&st->adc_base_spear6xx->average.msb) & SPEAR_ADC_DATA_MASK; } else { @@ -134,7 +134,7 @@ static u32 spear_adc_get_average(struct spear_adc_state *st) static void spear_adc_set_scanrate(struct spear_adc_state *st, u32 rate) { - if (of_device_is_compatible(st->np, "st,spear600-adc")) { + if (device_is_compatible(st->dev, "st,spear600-adc")) { __raw_writel(SPEAR600_ADC_SCAN_RATE_LO(rate), &st->adc_base_spear6xx->scan_rate_lo); __raw_writel(SPEAR600_ADC_SCAN_RATE_HI(rate), @@ -266,7 +266,6 @@ static const struct iio_info spear_adc_info = { static int spear_adc_probe(struct platform_device *pdev) { - struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; struct spear_adc_state *st; struct iio_dev *indio_dev = NULL; @@ -279,11 +278,10 @@ static int spear_adc_probe(struct platform_device *pdev) "failed allocating iio device\n"); st = iio_priv(indio_dev); + st->dev = dev; mutex_init(&st->lock); - st->np = np; - /* * SPEAr600 has a different register layout than other SPEAr SoC's * (e.g. SPEAr3xx). Let's provide two register base addresses @@ -310,8 +308,7 @@ static int spear_adc_probe(struct platform_device *pdev) if (ret < 0) return dev_err_probe(dev, ret, "failed requesting interrupt\n"); - if (of_property_read_u32(np, "sampling-frequency", - &st->sampling_freq)) + if (device_property_read_u32(dev, "sampling-frequency", &st->sampling_freq)) return dev_err_probe(dev, -EINVAL, "sampling-frequency missing in DT\n"); @@ -319,13 +316,13 @@ static int spear_adc_probe(struct platform_device *pdev) * Optional avg_samples defaults to 0, resulting in single data * conversion */ - of_property_read_u32(np, "average-samples", &st->avg_samples); + device_property_read_u32(dev, "average-samples", &st->avg_samples); /* * Optional vref_external defaults to 0, resulting in internal vref * selection */ - of_property_read_u32(np, "vref-external", &st->vref_external); + device_property_read_u32(dev, "vref-external", &st->vref_external); spear_adc_configure(st); @@ -346,19 +343,17 @@ static int spear_adc_probe(struct platform_device *pdev) return 0; } -#ifdef CONFIG_OF static const struct of_device_id spear_adc_dt_ids[] = { { .compatible = "st,spear600-adc", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, spear_adc_dt_ids); -#endif static struct platform_driver spear_adc_driver = { .probe = spear_adc_probe, .driver = { .name = SPEAR_ADC_MOD_NAME, - .of_match_table = of_match_ptr(spear_adc_dt_ids), + .of_match_table = spear_adc_dt_ids, }, }; diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c index b5d3c9cea5c4e3..36add95212c370 100644 --- a/drivers/iio/adc/stm32-adc.c +++ b/drivers/iio/adc/stm32-adc.c @@ -2187,58 +2187,52 @@ static int stm32_adc_generic_chan_init(struct iio_dev *indio_dev, struct iio_chan_spec *channels) { const struct stm32_adc_info *adc_info = adc->cfg->adc_info; - struct fwnode_handle *child; + struct device *dev = &indio_dev->dev; const char *name; int val, scan_index = 0, ret; bool differential; u32 vin[2]; - device_for_each_child_node(&indio_dev->dev, child) { + device_for_each_child_node_scoped(dev, child) { ret = fwnode_property_read_u32(child, "reg", &val); - if (ret) { - dev_err(&indio_dev->dev, "Missing channel index %d\n", ret); - goto err; - } + if (ret) + return dev_err_probe(dev, ret, + "Missing channel index\n"); ret = fwnode_property_read_string(child, "label", &name); /* label is optional */ if (!ret) { - if (strlen(name) >= STM32_ADC_CH_SZ) { - dev_err(&indio_dev->dev, "Label %s exceeds %d characters\n", - name, STM32_ADC_CH_SZ); - ret = -EINVAL; - goto err; - } + if (strlen(name) >= STM32_ADC_CH_SZ) + return dev_err_probe(dev, -EINVAL, + "Label %s exceeds %d characters\n", + name, STM32_ADC_CH_SZ); + strscpy(adc->chan_name[val], name, STM32_ADC_CH_SZ); ret = stm32_adc_populate_int_ch(indio_dev, name, val); if (ret == -ENOENT) continue; else if (ret) - goto err; + return ret; } else if (ret != -EINVAL) { - dev_err(&indio_dev->dev, "Invalid label %d\n", ret); - goto err; + return dev_err_probe(dev, ret, "Invalid label\n"); } - if (val >= adc_info->max_channels) { - dev_err(&indio_dev->dev, "Invalid channel %d\n", val); - ret = -EINVAL; - goto err; - } + if (val >= adc_info->max_channels) + return dev_err_probe(dev, -EINVAL, + "Invalid channel %d\n", val); differential = false; ret = fwnode_property_read_u32_array(child, "diff-channels", vin, 2); /* diff-channels is optional */ if (!ret) { differential = true; - if (vin[0] != val || vin[1] >= adc_info->max_channels) { - dev_err(&indio_dev->dev, "Invalid channel in%d-in%d\n", - vin[0], vin[1]); - goto err; - } + if (vin[0] != val || vin[1] >= adc_info->max_channels) + return dev_err_probe(dev, -EINVAL, + "Invalid channel in%d-in%d\n", + vin[0], vin[1]); } else if (ret != -EINVAL) { - dev_err(&indio_dev->dev, "Invalid diff-channels property %d\n", ret); - goto err; + return dev_err_probe(dev, ret, + "Invalid diff-channels property\n"); } stm32_adc_chan_init_one(indio_dev, &channels[scan_index], val, @@ -2247,11 +2241,9 @@ static int stm32_adc_generic_chan_init(struct iio_dev *indio_dev, val = 0; ret = fwnode_property_read_u32(child, "st,min-sample-time-ns", &val); /* st,min-sample-time-ns is optional */ - if (ret && ret != -EINVAL) { - dev_err(&indio_dev->dev, "Invalid st,min-sample-time-ns property %d\n", - ret); - goto err; - } + if (ret && ret != -EINVAL) + return dev_err_probe(dev, ret, + "Invalid st,min-sample-time-ns property\n"); stm32_adc_smpr_init(adc, channels[scan_index].channel, val); if (differential) @@ -2261,11 +2253,6 @@ static int stm32_adc_generic_chan_init(struct iio_dev *indio_dev, } return scan_index; - -err: - fwnode_handle_put(child); - - return ret; } static int stm32_adc_chan_fw_init(struct iio_dev *indio_dev, bool timestamping) diff --git a/drivers/iio/adc/ti-ads131e08.c b/drivers/iio/adc/ti-ads131e08.c index fcfc4625431332..cb04a29b3dbab9 100644 --- a/drivers/iio/adc/ti-ads131e08.c +++ b/drivers/iio/adc/ti-ads131e08.c @@ -694,7 +694,6 @@ static int ads131e08_alloc_channels(struct iio_dev *indio_dev) struct ads131e08_channel_config *channel_config; struct device *dev = &st->spi->dev; struct iio_chan_spec *channels; - struct fwnode_handle *node; unsigned int channel, tmp; int num_channels, i, ret; @@ -736,10 +735,10 @@ static int ads131e08_alloc_channels(struct iio_dev *indio_dev) return -ENOMEM; i = 0; - device_for_each_child_node(dev, node) { + device_for_each_child_node_scoped(dev, node) { ret = fwnode_property_read_u32(node, "reg", &channel); if (ret) - goto err_child_out; + return ret; ret = fwnode_property_read_u32(node, "ti,gain", &tmp); if (ret) { @@ -747,7 +746,7 @@ static int ads131e08_alloc_channels(struct iio_dev *indio_dev) } else { ret = ads131e08_pga_gain_to_field_value(st, tmp); if (ret < 0) - goto err_child_out; + return ret; channel_config[i].pga_gain = tmp; } @@ -758,7 +757,7 @@ static int ads131e08_alloc_channels(struct iio_dev *indio_dev) } else { ret = ads131e08_validate_channel_mux(st, tmp); if (ret) - goto err_child_out; + return ret; channel_config[i].mux = tmp; } @@ -785,9 +784,6 @@ static int ads131e08_alloc_channels(struct iio_dev *indio_dev) return 0; -err_child_out: - fwnode_handle_put(node); - return ret; } static void ads131e08_regulator_disable(void *data) diff --git a/drivers/iio/adc/twl4030-madc.c b/drivers/iio/adc/twl4030-madc.c index 4a247ca25a4497..0253064fadec84 100644 --- a/drivers/iio/adc/twl4030-madc.c +++ b/drivers/iio/adc/twl4030-madc.c @@ -19,10 +19,12 @@ #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/delay.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> #include <linux/platform_device.h> +#include <linux/property.h> #include <linux/slab.h> #include <linux/mfd/twl.h> -#include <linux/module.h> #include <linux/stddef.h> #include <linux/mutex.h> #include <linux/bitops.h> @@ -30,7 +32,6 @@ #include <linux/types.h> #include <linux/gfp.h> #include <linux/err.h> -#include <linux/of.h> #include <linux/regulator/consumer.h> #include <linux/iio/iio.h> @@ -744,14 +745,14 @@ static int twl4030_madc_set_power(struct twl4030_madc_data *madc, int on) */ static int twl4030_madc_probe(struct platform_device *pdev) { + struct device *dev = &pdev->dev; + struct twl4030_madc_platform_data *pdata = dev_get_platdata(dev); struct twl4030_madc_data *madc; - struct twl4030_madc_platform_data *pdata = dev_get_platdata(&pdev->dev); - struct device_node *np = pdev->dev.of_node; int irq, ret; u8 regval; struct iio_dev *iio_dev = NULL; - if (!pdata && !np) { + if (!pdata && !dev_fwnode(dev)) { dev_err(&pdev->dev, "neither platform data nor Device Tree node available\n"); return -EINVAL; } @@ -779,7 +780,7 @@ static int twl4030_madc_probe(struct platform_device *pdev) if (pdata) madc->use_second_irq = (pdata->irq_line != 1); else - madc->use_second_irq = of_property_read_bool(np, + madc->use_second_irq = device_property_read_bool(dev, "ti,system-uses-second-madc-irq"); madc->imr = madc->use_second_irq ? TWL4030_MADC_IMR2 : @@ -905,20 +906,18 @@ static void twl4030_madc_remove(struct platform_device *pdev) regulator_disable(madc->usb3v1); } -#ifdef CONFIG_OF static const struct of_device_id twl_madc_of_match[] = { { .compatible = "ti,twl4030-madc", }, - { }, + { } }; MODULE_DEVICE_TABLE(of, twl_madc_of_match); -#endif static struct platform_driver twl4030_madc_driver = { .probe = twl4030_madc_probe, .remove_new = twl4030_madc_remove, .driver = { .name = "twl4030_madc", - .of_match_table = of_match_ptr(twl_madc_of_match), + .of_match_table = twl_madc_of_match, }, }; diff --git a/drivers/iio/addac/ad74413r.c b/drivers/iio/addac/ad74413r.c index 7af3e4b8fe3bb9..cd26a16dc0ff80 100644 --- a/drivers/iio/addac/ad74413r.c +++ b/drivers/iio/addac/ad74413r.c @@ -1255,21 +1255,15 @@ static int ad74413r_parse_channel_config(struct iio_dev *indio_dev, static int ad74413r_parse_channel_configs(struct iio_dev *indio_dev) { struct ad74413r_state *st = iio_priv(indio_dev); - struct fwnode_handle *channel_node = NULL; int ret; - fwnode_for_each_available_child_node(dev_fwnode(st->dev), channel_node) { + device_for_each_child_node_scoped(st->dev, channel_node) { ret = ad74413r_parse_channel_config(indio_dev, channel_node); if (ret) - goto put_channel_node; + return ret; } return 0; - -put_channel_node: - fwnode_handle_put(channel_node); - - return ret; } static int ad74413r_setup_channels(struct iio_dev *indio_dev) diff --git a/drivers/iio/buffer/industrialio-buffer-dma.c b/drivers/iio/buffer/industrialio-buffer-dma.c index 5610ba67925efc..13b1a858969e9e 100644 --- a/drivers/iio/buffer/industrialio-buffer-dma.c +++ b/drivers/iio/buffer/industrialio-buffer-dma.c @@ -195,6 +195,18 @@ static void _iio_dma_buffer_block_done(struct iio_dma_buffer_block *block) block->state = IIO_BLOCK_STATE_DONE; } +static void iio_dma_buffer_queue_wake(struct iio_dma_buffer_queue *queue) +{ + __poll_t flags; + + if (queue->buffer.direction == IIO_BUFFER_DIRECTION_IN) + flags = EPOLLIN | EPOLLRDNORM; + else + flags = EPOLLOUT | EPOLLWRNORM; + + wake_up_interruptible_poll(&queue->buffer.pollq, flags); +} + /** * iio_dma_buffer_block_done() - Indicate that a block has been completed * @block: The completed block @@ -212,7 +224,7 @@ void iio_dma_buffer_block_done(struct iio_dma_buffer_block *block) spin_unlock_irqrestore(&queue->list_lock, flags); iio_buffer_block_put_atomic(block); - wake_up_interruptible_poll(&queue->buffer.pollq, EPOLLIN | EPOLLRDNORM); + iio_dma_buffer_queue_wake(queue); } EXPORT_SYMBOL_GPL(iio_dma_buffer_block_done); @@ -241,7 +253,7 @@ void iio_dma_buffer_block_list_abort(struct iio_dma_buffer_queue *queue, } spin_unlock_irqrestore(&queue->list_lock, flags); - wake_up_interruptible_poll(&queue->buffer.pollq, EPOLLIN | EPOLLRDNORM); + iio_dma_buffer_queue_wake(queue); } EXPORT_SYMBOL_GPL(iio_dma_buffer_block_list_abort); @@ -335,8 +347,24 @@ int iio_dma_buffer_request_update(struct iio_buffer *buffer) queue->fileio.blocks[i] = block; } - block->state = IIO_BLOCK_STATE_QUEUED; - list_add_tail(&block->head, &queue->incoming); + /* + * block->bytes_used may have been modified previously, e.g. by + * iio_dma_buffer_block_list_abort(). Reset it here to the + * block's so that iio_dma_buffer_io() will work. + */ + block->bytes_used = block->size; + + /* + * If it's an input buffer, mark the block as queued, and + * iio_dma_buffer_enable() will submit it. Otherwise mark it as + * done, which means it's ready to be dequeued. + */ + if (queue->buffer.direction == IIO_BUFFER_DIRECTION_IN) { + block->state = IIO_BLOCK_STATE_QUEUED; + list_add_tail(&block->head, &queue->incoming); + } else { + block->state = IIO_BLOCK_STATE_DONE; + } } out_unlock: @@ -488,20 +516,12 @@ static struct iio_dma_buffer_block *iio_dma_buffer_dequeue( return block; } -/** - * iio_dma_buffer_read() - DMA buffer read callback - * @buffer: Buffer to read form - * @n: Number of bytes to read - * @user_buffer: Userspace buffer to copy the data to - * - * Should be used as the read callback for iio_buffer_access_ops - * struct for DMA buffers. - */ -int iio_dma_buffer_read(struct iio_buffer *buffer, size_t n, - char __user *user_buffer) +static int iio_dma_buffer_io(struct iio_buffer *buffer, size_t n, + char __user *user_buffer, bool is_from_user) { struct iio_dma_buffer_queue *queue = iio_buffer_to_queue(buffer); struct iio_dma_buffer_block *block; + void *addr; int ret; if (n < buffer->bytes_per_datum) @@ -524,8 +544,13 @@ int iio_dma_buffer_read(struct iio_buffer *buffer, size_t n, n = rounddown(n, buffer->bytes_per_datum); if (n > block->bytes_used - queue->fileio.pos) n = block->bytes_used - queue->fileio.pos; + addr = block->vaddr + queue->fileio.pos; - if (copy_to_user(user_buffer, block->vaddr + queue->fileio.pos, n)) { + if (is_from_user) + ret = copy_from_user(addr, user_buffer, n); + else + ret = copy_to_user(user_buffer, addr, n); + if (ret) { ret = -EFAULT; goto out_unlock; } @@ -544,16 +569,49 @@ out_unlock: return ret; } + +/** + * iio_dma_buffer_read() - DMA buffer read callback + * @buffer: Buffer to read form + * @n: Number of bytes to read + * @user_buffer: Userspace buffer to copy the data to + * + * Should be used as the read callback for iio_buffer_access_ops + * struct for DMA buffers. + */ +int iio_dma_buffer_read(struct iio_buffer *buffer, size_t n, + char __user *user_buffer) +{ + return iio_dma_buffer_io(buffer, n, user_buffer, false); +} EXPORT_SYMBOL_GPL(iio_dma_buffer_read); /** - * iio_dma_buffer_data_available() - DMA buffer data_available callback - * @buf: Buffer to check for data availability + * iio_dma_buffer_write() - DMA buffer write callback + * @buffer: Buffer to read form + * @n: Number of bytes to read + * @user_buffer: Userspace buffer to copy the data from * - * Should be used as the data_available callback for iio_buffer_access_ops + * Should be used as the write callback for iio_buffer_access_ops * struct for DMA buffers. */ -size_t iio_dma_buffer_data_available(struct iio_buffer *buf) +int iio_dma_buffer_write(struct iio_buffer *buffer, size_t n, + const char __user *user_buffer) +{ + return iio_dma_buffer_io(buffer, n, + (__force __user char *)user_buffer, true); +} +EXPORT_SYMBOL_GPL(iio_dma_buffer_write); + +/** + * iio_dma_buffer_usage() - DMA buffer data_available and + * space_available callback + * @buf: Buffer to check for data availability + * + * Should be used as the data_available and space_available callbacks for + * iio_buffer_access_ops struct for DMA buffers. + */ +size_t iio_dma_buffer_usage(struct iio_buffer *buf) { struct iio_dma_buffer_queue *queue = iio_buffer_to_queue(buf); struct iio_dma_buffer_block *block; @@ -586,7 +644,7 @@ size_t iio_dma_buffer_data_available(struct iio_buffer *buf) return data_available; } -EXPORT_SYMBOL_GPL(iio_dma_buffer_data_available); +EXPORT_SYMBOL_GPL(iio_dma_buffer_usage); /** * iio_dma_buffer_set_bytes_per_datum() - DMA buffer set_bytes_per_datum callback diff --git a/drivers/iio/buffer/industrialio-buffer-dmaengine.c b/drivers/iio/buffer/industrialio-buffer-dmaengine.c index a18c1da292af22..918f6f8d65b6ca 100644 --- a/drivers/iio/buffer/industrialio-buffer-dmaengine.c +++ b/drivers/iio/buffer/industrialio-buffer-dmaengine.c @@ -64,14 +64,25 @@ static int iio_dmaengine_buffer_submit_block(struct iio_dma_buffer_queue *queue, struct dmaengine_buffer *dmaengine_buffer = iio_buffer_to_dmaengine_buffer(&queue->buffer); struct dma_async_tx_descriptor *desc; + enum dma_transfer_direction dma_dir; + size_t max_size; dma_cookie_t cookie; - block->bytes_used = min(block->size, dmaengine_buffer->max_size); - block->bytes_used = round_down(block->bytes_used, - dmaengine_buffer->align); + max_size = min(block->size, dmaengine_buffer->max_size); + max_size = round_down(max_size, dmaengine_buffer->align); + + if (queue->buffer.direction == IIO_BUFFER_DIRECTION_IN) { + block->bytes_used = max_size; + dma_dir = DMA_DEV_TO_MEM; + } else { + dma_dir = DMA_MEM_TO_DEV; + } + + if (!block->bytes_used || block->bytes_used > max_size) + return -EINVAL; desc = dmaengine_prep_slave_single(dmaengine_buffer->chan, - block->phys_addr, block->bytes_used, DMA_DEV_TO_MEM, + block->phys_addr, block->bytes_used, dma_dir, DMA_PREP_INTERRUPT); if (!desc) return -ENOMEM; @@ -112,12 +123,14 @@ static void iio_dmaengine_buffer_release(struct iio_buffer *buf) static const struct iio_buffer_access_funcs iio_dmaengine_buffer_ops = { .read = iio_dma_buffer_read, + .write = iio_dma_buffer_write, .set_bytes_per_datum = iio_dma_buffer_set_bytes_per_datum, .set_length = iio_dma_buffer_set_length, .request_update = iio_dma_buffer_request_update, .enable = iio_dma_buffer_enable, .disable = iio_dma_buffer_disable, - .data_available = iio_dma_buffer_data_available, + .data_available = iio_dma_buffer_usage, + .space_available = iio_dma_buffer_usage, .release = iio_dmaengine_buffer_release, .modes = INDIO_BUFFER_HARDWARE, @@ -159,7 +172,7 @@ static const struct iio_dev_attr *iio_dmaengine_buffer_attrs[] = { * Once done using the buffer iio_dmaengine_buffer_free() should be used to * release it. */ -struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev, +static struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev, const char *channel) { struct dmaengine_buffer *dmaengine_buffer; @@ -210,7 +223,6 @@ err_free: kfree(dmaengine_buffer); return ERR_PTR(ret); } -EXPORT_SYMBOL_NS_GPL(iio_dmaengine_buffer_alloc, IIO_DMAENGINE_BUFFER); /** * iio_dmaengine_buffer_free() - Free dmaengine buffer @@ -230,66 +242,64 @@ void iio_dmaengine_buffer_free(struct iio_buffer *buffer) } EXPORT_SYMBOL_NS_GPL(iio_dmaengine_buffer_free, IIO_DMAENGINE_BUFFER); -static void __devm_iio_dmaengine_buffer_free(void *buffer) -{ - iio_dmaengine_buffer_free(buffer); -} - -/** - * devm_iio_dmaengine_buffer_alloc() - Resource-managed iio_dmaengine_buffer_alloc() - * @dev: Parent device for the buffer - * @channel: DMA channel name, typically "rx". - * - * This allocates a new IIO buffer which internally uses the DMAengine framework - * to perform its transfers. The parent device will be used to request the DMA - * channel. - * - * The buffer will be automatically de-allocated once the device gets destroyed. - */ -static struct iio_buffer *devm_iio_dmaengine_buffer_alloc(struct device *dev, - const char *channel) +struct iio_buffer *iio_dmaengine_buffer_setup_ext(struct device *dev, + struct iio_dev *indio_dev, + const char *channel, + enum iio_buffer_direction dir) { struct iio_buffer *buffer; int ret; buffer = iio_dmaengine_buffer_alloc(dev, channel); if (IS_ERR(buffer)) - return buffer; + return ERR_CAST(buffer); - ret = devm_add_action_or_reset(dev, __devm_iio_dmaengine_buffer_free, - buffer); - if (ret) + indio_dev->modes |= INDIO_BUFFER_HARDWARE; + + buffer->direction = dir; + + ret = iio_device_attach_buffer(indio_dev, buffer); + if (ret) { + iio_dmaengine_buffer_free(buffer); return ERR_PTR(ret); + } return buffer; } +EXPORT_SYMBOL_NS_GPL(iio_dmaengine_buffer_setup_ext, IIO_DMAENGINE_BUFFER); + +static void __devm_iio_dmaengine_buffer_free(void *buffer) +{ + iio_dmaengine_buffer_free(buffer); +} /** - * devm_iio_dmaengine_buffer_setup() - Setup a DMA buffer for an IIO device + * devm_iio_dmaengine_buffer_setup_ext() - Setup a DMA buffer for an IIO device * @dev: Parent device for the buffer * @indio_dev: IIO device to which to attach this buffer. * @channel: DMA channel name, typically "rx". + * @dir: Direction of buffer (in or out) * * This allocates a new IIO buffer with devm_iio_dmaengine_buffer_alloc() * and attaches it to an IIO device with iio_device_attach_buffer(). * It also appends the INDIO_BUFFER_HARDWARE mode to the supported modes of the * IIO device. */ -int devm_iio_dmaengine_buffer_setup(struct device *dev, - struct iio_dev *indio_dev, - const char *channel) +int devm_iio_dmaengine_buffer_setup_ext(struct device *dev, + struct iio_dev *indio_dev, + const char *channel, + enum iio_buffer_direction dir) { struct iio_buffer *buffer; - buffer = devm_iio_dmaengine_buffer_alloc(dev, channel); + buffer = iio_dmaengine_buffer_setup_ext(dev, indio_dev, channel, dir); if (IS_ERR(buffer)) return PTR_ERR(buffer); - indio_dev->modes |= INDIO_BUFFER_HARDWARE; - - return iio_device_attach_buffer(indio_dev, buffer); + return devm_add_action_or_reset(dev, __devm_iio_dmaengine_buffer_free, + buffer); } -EXPORT_SYMBOL_NS_GPL(devm_iio_dmaengine_buffer_setup, IIO_DMAENGINE_BUFFER); +EXPORT_SYMBOL_NS_GPL(devm_iio_dmaengine_buffer_setup_ext, IIO_DMAENGINE_BUFFER); MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); MODULE_DESCRIPTION("DMA buffer for the IIO framework"); diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index 34eb40bb95291a..3c2bf620f00fb4 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -131,6 +131,43 @@ config AD5624R_SPI Say yes here to build support for Analog Devices AD5624R, AD5644R and AD5664R converters (DAC). This driver uses the common SPI interface. +config AD9739A + tristate "Analog Devices AD9739A RF DAC spi driver" + depends on SPI || COMPILE_TEST + select REGMAP_SPI + select IIO_BACKEND + help + Say yes here to build support for Analog Devices AD9739A Digital-to + Analog Converter. + + The driver requires the assistance of the AXI DAC IP core to operate, + since SPI is used for configuration only, while data has to be + streamed into memory via DMA. + + To compile this driver as a module, choose M here: the module will be + called ad9739a. + +config ADI_AXI_DAC + tristate "Analog Devices Generic AXI DAC IP core driver" + select IIO_BUFFER + select IIO_BUFFER_DMAENGINE + select REGMAP_MMIO + select IIO_BACKEND + help + Say yes here to build support for Analog Devices Generic + AXI DAC IP core. The IP core is used for interfacing with + digital-to-analog (DAC) converters that require either a high-speed + serial interface (JESD204B/C) or a source synchronous parallel + interface (LVDS/CMOS). + Typically (for such devices) SPI will be used for configuration only, + while this IP core handles the streaming of data into memory via DMA. + + Link: https://wiki.analog.com/resources/fpga/docs/axi_dac_ip + If unsure, say N (but it's safe to say "Y"). + + To compile this driver as a module, choose M here: the + module will be called adi-axi-dac. + config LTC2688 tristate "Analog Devices LTC2688 DAC spi driver" depends on SPI diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index 55bf89739d14b9..8432a81a19dc2f 100644 --- a/drivers/iio/dac/Makefile +++ b/drivers/iio/dac/Makefile @@ -29,6 +29,8 @@ obj-$(CONFIG_AD5696_I2C) += ad5696-i2c.o obj-$(CONFIG_AD7293) += ad7293.o obj-$(CONFIG_AD7303) += ad7303.o obj-$(CONFIG_AD8801) += ad8801.o +obj-$(CONFIG_AD9739A) += ad9739a.o +obj-$(CONFIG_ADI_AXI_DAC) += adi-axi-dac.o obj-$(CONFIG_CIO_DAC) += cio-dac.o obj-$(CONFIG_DPOT_DAC) += dpot-dac.o obj-$(CONFIG_DS4424) += ds4424.o diff --git a/drivers/iio/dac/ad3552r.c b/drivers/iio/dac/ad3552r.c index a492e8f2fc0fbc..8aa942896b5bc1 100644 --- a/drivers/iio/dac/ad3552r.c +++ b/drivers/iio/dac/ad3552r.c @@ -801,51 +801,45 @@ static int ad3552r_configure_custom_gain(struct ad3552r_desc *dac, u32 ch) { struct device *dev = &dac->spi->dev; - struct fwnode_handle *gain_child; u32 val; int err; u8 addr; u16 reg = 0, offset; - gain_child = fwnode_get_named_child_node(child, - "custom-output-range-config"); - if (!gain_child) { - dev_err(dev, - "mandatory custom-output-range-config property missing\n"); - return -EINVAL; - } + struct fwnode_handle *gain_child __free(fwnode_handle) + = fwnode_get_named_child_node(child, + "custom-output-range-config"); + if (!gain_child) + return dev_err_probe(dev, -EINVAL, + "mandatory custom-output-range-config property missing\n"); dac->ch_data[ch].range_override = 1; reg |= ad3552r_field_prep(1, AD3552R_MASK_CH_RANGE_OVERRIDE); err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-p", &val); - if (err) { - dev_err(dev, "mandatory adi,gain-scaling-p property missing\n"); - goto put_child; - } + if (err) + return dev_err_probe(dev, err, + "mandatory adi,gain-scaling-p property missing\n"); reg |= ad3552r_field_prep(val, AD3552R_MASK_CH_GAIN_SCALING_P); dac->ch_data[ch].p = val; err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-n", &val); - if (err) { - dev_err(dev, "mandatory adi,gain-scaling-n property missing\n"); - goto put_child; - } + if (err) + return dev_err_probe(dev, err, + "mandatory adi,gain-scaling-n property missing\n"); reg |= ad3552r_field_prep(val, AD3552R_MASK_CH_GAIN_SCALING_N); dac->ch_data[ch].n = val; err = fwnode_property_read_u32(gain_child, "adi,rfb-ohms", &val); - if (err) { - dev_err(dev, "mandatory adi,rfb-ohms property missing\n"); - goto put_child; - } + if (err) + return dev_err_probe(dev, err, + "mandatory adi,rfb-ohms property missing\n"); dac->ch_data[ch].rfb = val; err = fwnode_property_read_u32(gain_child, "adi,gain-offset", &val); - if (err) { - dev_err(dev, "mandatory adi,gain-offset property missing\n"); - goto put_child; - } + if (err) + return dev_err_probe(dev, err, + "mandatory adi,gain-offset property missing\n"); dac->ch_data[ch].gain_offset = val; offset = abs((s32)val); @@ -855,21 +849,14 @@ static int ad3552r_configure_custom_gain(struct ad3552r_desc *dac, addr = AD3552R_REG_ADDR_CH_GAIN(ch); err = ad3552r_write_reg(dac, addr, offset & AD3552R_MASK_CH_OFFSET_BITS_0_7); - if (err) { - dev_err(dev, "Error writing register\n"); - goto put_child; - } + if (err) + return dev_err_probe(dev, err, "Error writing register\n"); err = ad3552r_write_reg(dac, addr, reg); - if (err) { - dev_err(dev, "Error writing register\n"); - goto put_child; - } - -put_child: - fwnode_handle_put(gain_child); + if (err) + return dev_err_probe(dev, err, "Error writing register\n"); - return err; + return 0; } static void ad3552r_reg_disable(void *reg) @@ -880,7 +867,6 @@ static void ad3552r_reg_disable(void *reg) static int ad3552r_configure_device(struct ad3552r_desc *dac) { struct device *dev = &dac->spi->dev; - struct fwnode_handle *child; struct regulator *vref; int err, cnt = 0, voltage, delta = 100000; u32 vals[2], val, ch; @@ -949,53 +935,45 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac) return -ENODEV; } - device_for_each_child_node(dev, child) { + device_for_each_child_node_scoped(dev, child) { err = fwnode_property_read_u32(child, "reg", &ch); - if (err) { - dev_err(dev, "mandatory reg property missing\n"); - goto put_child; - } - if (ch >= AD3552R_NUM_CH) { - dev_err(dev, "reg must be less than %d\n", - AD3552R_NUM_CH); - err = -EINVAL; - goto put_child; - } + if (err) + return dev_err_probe(dev, err, + "mandatory reg property missing\n"); + if (ch >= AD3552R_NUM_CH) + return dev_err_probe(dev, -EINVAL, + "reg must be less than %d\n", + AD3552R_NUM_CH); if (fwnode_property_present(child, "adi,output-range-microvolt")) { err = fwnode_property_read_u32_array(child, "adi,output-range-microvolt", vals, 2); - if (err) { - dev_err(dev, + if (err) + return dev_err_probe(dev, err, "adi,output-range-microvolt property could not be parsed\n"); - goto put_child; - } err = ad3552r_find_range(dac->chip_id, vals); - if (err < 0) { - dev_err(dev, - "Invalid adi,output-range-microvolt value\n"); - goto put_child; - } + if (err < 0) + return dev_err_probe(dev, err, + "Invalid adi,output-range-microvolt value\n"); + val = err; err = ad3552r_set_ch_value(dac, AD3552R_CH_OUTPUT_RANGE_SEL, ch, val); if (err) - goto put_child; + return err; dac->ch_data[ch].range = val; } else if (dac->chip_id == AD3542R_ID) { - dev_err(dev, - "adi,output-range-microvolt is required for ad3542r\n"); - err = -EINVAL; - goto put_child; + return dev_err_probe(dev, -EINVAL, + "adi,output-range-microvolt is required for ad3542r\n"); } else { err = ad3552r_configure_custom_gain(dac, child, ch); if (err) - goto put_child; + return err; } ad3552r_calc_gain_and_offset(dac, ch); @@ -1003,7 +981,7 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac) err = ad3552r_set_ch_value(dac, AD3552R_CH_SELECT, ch, 1); if (err < 0) - goto put_child; + return err; dac->channels[cnt] = AD3552R_CH_DAC(ch); ++cnt; @@ -1021,10 +999,6 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac) dac->num_ch = cnt; return 0; -put_child: - fwnode_handle_put(child); - - return err; } static int ad3552r_init(struct ad3552r_desc *dac) diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c index 404865e354602c..0b24cb19ac9d1c 100644 --- a/drivers/iio/dac/ad5755.c +++ b/drivers/iio/dac/ad5755.c @@ -809,7 +809,6 @@ static struct ad5755_platform_data *ad5755_parse_fw(struct device *dev) static int ad5755_probe(struct spi_device *spi) { - enum ad5755_type type = spi_get_device_id(spi)->driver_data; const struct ad5755_platform_data *pdata; struct iio_dev *indio_dev; struct ad5755_state *st; @@ -824,7 +823,7 @@ static int ad5755_probe(struct spi_device *spi) st = iio_priv(indio_dev); spi_set_drvdata(spi, indio_dev); - st->chip_info = &ad5755_chip_info_tbl[type]; + st->chip_info = spi_get_device_match_data(spi); st->spi = spi; st->pwr_down = 0xf; @@ -854,21 +853,21 @@ static int ad5755_probe(struct spi_device *spi) } static const struct spi_device_id ad5755_id[] = { - { "ad5755", ID_AD5755 }, - { "ad5755-1", ID_AD5755 }, - { "ad5757", ID_AD5757 }, - { "ad5735", ID_AD5735 }, - { "ad5737", ID_AD5737 }, + { "ad5755", (kernel_ulong_t)&ad5755_chip_info_tbl[ID_AD5755] }, + { "ad5755-1", (kernel_ulong_t)&ad5755_chip_info_tbl[ID_AD5755] }, + { "ad5757", (kernel_ulong_t)&ad5755_chip_info_tbl[ID_AD5757] }, + { "ad5735", (kernel_ulong_t)&ad5755_chip_info_tbl[ID_AD5735] }, + { "ad5737", (kernel_ulong_t)&ad5755_chip_info_tbl[ID_AD5737] }, {} }; MODULE_DEVICE_TABLE(spi, ad5755_id); static const struct of_device_id ad5755_of_match[] = { - { .compatible = "adi,ad5755" }, - { .compatible = "adi,ad5755-1" }, - { .compatible = "adi,ad5757" }, - { .compatible = "adi,ad5735" }, - { .compatible = "adi,ad5737" }, + { .compatible = "adi,ad5755", &ad5755_chip_info_tbl[ID_AD5755] }, + { .compatible = "adi,ad5755-1", &ad5755_chip_info_tbl[ID_AD5755] }, + { .compatible = "adi,ad5757", &ad5755_chip_info_tbl[ID_AD5757] }, + { .compatible = "adi,ad5735", &ad5755_chip_info_tbl[ID_AD5735] }, + { .compatible = "adi,ad5737", &ad5755_chip_info_tbl[ID_AD5737] }, { } }; MODULE_DEVICE_TABLE(of, ad5755_of_match); @@ -876,6 +875,7 @@ MODULE_DEVICE_TABLE(of, ad5755_of_match); static struct spi_driver ad5755_driver = { .driver = { .name = "ad5755", + .of_match_table = ad5755_of_match, }, .probe = ad5755_probe, .id_table = ad5755_id, diff --git a/drivers/iio/dac/ad5770r.c b/drivers/iio/dac/ad5770r.c index f66d67402e4365..c360ebf5297ab9 100644 --- a/drivers/iio/dac/ad5770r.c +++ b/drivers/iio/dac/ad5770r.c @@ -515,39 +515,32 @@ static int ad5770r_channel_config(struct ad5770r_state *st) { int ret, tmp[2], min, max; unsigned int num; - struct fwnode_handle *child; num = device_get_child_node_count(&st->spi->dev); if (num != AD5770R_MAX_CHANNELS) return -EINVAL; - device_for_each_child_node(&st->spi->dev, child) { + device_for_each_child_node_scoped(&st->spi->dev, child) { ret = fwnode_property_read_u32(child, "reg", &num); if (ret) - goto err_child_out; - if (num >= AD5770R_MAX_CHANNELS) { - ret = -EINVAL; - goto err_child_out; - } + return ret; + if (num >= AD5770R_MAX_CHANNELS) + return -EINVAL; ret = fwnode_property_read_u32_array(child, "adi,range-microamp", tmp, 2); if (ret) - goto err_child_out; + return ret; min = tmp[0] / 1000; max = tmp[1] / 1000; ret = ad5770r_store_output_range(st, min, max, num); if (ret) - goto err_child_out; + return ret; } return 0; - -err_child_out: - fwnode_handle_put(child); - return ret; } static int ad5770r_init(struct ad5770r_state *st) diff --git a/drivers/iio/dac/ad9739a.c b/drivers/iio/dac/ad9739a.c new file mode 100644 index 00000000000000..ff33120075bf60 --- /dev/null +++ b/drivers/iio/dac/ad9739a.c @@ -0,0 +1,463 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Analog Devices AD9739a SPI DAC driver + * + * Copyright 2015-2024 Analog Devices Inc. + */ +#include <linux/bitfield.h> +#include <linux/bits.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/gpio/consumer.h> +#include <linux/minmax.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/property.h> +#include <linux/regmap.h> +#include <linux/spi/spi.h> +#include <linux/units.h> + +#include <linux/iio/backend.h> +#include <linux/iio/iio.h> +#include <linux/iio/types.h> + +#define AD9739A_REG_MODE 0 +#define AD9739A_RESET_MASK BIT(5) +#define AD9739A_REG_FSC_1 0x06 +#define AD9739A_REG_FSC_2 0x07 +#define AD9739A_FSC_MSB GENMASK(1, 0) +#define AD9739A_REG_DEC_CNT 0x8 +#define AD9739A_NORMAL_MODE 0 +#define AD9739A_MIXED_MODE 2 +#define AD9739A_DAC_DEC GENMASK(1, 0) +#define AD9739A_REG_LVDS_REC_CNT1 0x10 +#define AD9739A_RCVR_LOOP_EN_MASK GENMASK(1, 0) +#define AD9739A_REG_LVDS_REC_CNT4 0x13 +#define AD9739A_FINE_DEL_SKW_MASK GENMASK(3, 0) +#define AD9739A_REG_LVDS_REC_STAT9 0x21 +#define AD9739A_RCVR_TRACK_AND_LOCK (BIT(3) | BIT(0)) +#define AD9739A_REG_CROSS_CNT1 0x22 +#define AD9739A_REG_CROSS_CNT2 0x23 +#define AD9739A_REG_PHS_DET 0x24 +#define AD9739A_REG_MU_DUTY 0x25 +#define AD9739A_REG_MU_CNT1 0x26 +#define AD9739A_MU_EN_MASK BIT(0) +#define AD9739A_REG_MU_CNT2 0x27 +#define AD9739A_REG_MU_CNT3 0x28 +#define AD9739A_REG_MU_CNT4 0x29 +#define AD9739A_MU_CNT4_DEFAULT 0xcb +#define AD9739A_REG_MU_STAT1 0x2A +#define AD9739A_MU_LOCK_MASK BIT(0) +#define AD9739A_REG_ANA_CNT_1 0x32 +#define AD9739A_REG_ID 0x35 + +#define AD9739A_ID 0x24 +#define AD9739A_REG_IS_RESERVED(reg) \ + ((reg) == 0x5 || (reg) == 0x9 || (reg) == 0x0E || (reg) == 0x0D || \ + (reg) == 0x2B || (reg) == 0x2C || (reg) == 0x34) + +#define AD9739A_FSC_MIN 8580 +#define AD9739A_FSC_MAX 31700 +#define AD9739A_FSC_RANGE (AD9739A_FSC_MAX - AD9739A_FSC_MIN + 1) + +#define AD9739A_MIN_DAC_CLK (1600 * MEGA) +#define AD9739A_MAX_DAC_CLK (2500 * MEGA) +#define AD9739A_DAC_CLK_RANGE (AD9739A_MAX_DAC_CLK - AD9739A_MIN_DAC_CLK + 1) +/* as recommended by the datasheet */ +#define AD9739A_LOCK_N_TRIES 3 + +struct ad9739a_state { + struct iio_backend *back; + struct regmap *regmap; + unsigned long sample_rate; +}; + +static int ad9739a_oper_mode_get(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct ad9739a_state *st = iio_priv(indio_dev); + u32 mode; + int ret; + + ret = regmap_read(st->regmap, AD9739A_REG_DEC_CNT, &mode); + if (ret) + return ret; + + mode = FIELD_GET(AD9739A_DAC_DEC, mode); + /* sanity check we get valid values from the HW */ + if (mode != AD9739A_NORMAL_MODE && mode != AD9739A_MIXED_MODE) + return -EIO; + if (!mode) + return AD9739A_NORMAL_MODE; + + /* + * We get 2 from the device but for IIO modes, that means 1. Hence the + * minus 1. + */ + return AD9739A_MIXED_MODE - 1; +} + +static int ad9739a_oper_mode_set(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, u32 mode) +{ + struct ad9739a_state *st = iio_priv(indio_dev); + + /* + * On the IIO interface we have 0 and 1 for mode. But for mixed_mode, we + * need to write 2 in the device. That's what the below check is about. + */ + if (mode == AD9739A_MIXED_MODE - 1) + mode = AD9739A_MIXED_MODE; + + return regmap_update_bits(st->regmap, AD9739A_REG_DEC_CNT, + AD9739A_DAC_DEC, mode); +} + +static int ad9739a_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct ad9739a_state *st = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + *val = st->sample_rate; + *val2 = 0; + return IIO_VAL_INT_64; + default: + return -EINVAL; + } +} + +static int ad9739a_buffer_preenable(struct iio_dev *indio_dev) +{ + struct ad9739a_state *st = iio_priv(indio_dev); + + return iio_backend_data_source_set(st->back, 0, IIO_BACKEND_EXTERNAL); +} + +static int ad9739a_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct ad9739a_state *st = iio_priv(indio_dev); + + return iio_backend_data_source_set(st->back, 0, + IIO_BACKEND_INTERNAL_CONTINUOS_WAVE); +} + +static bool ad9739a_reg_accessible(struct device *dev, unsigned int reg) +{ + if (AD9739A_REG_IS_RESERVED(reg)) + return false; + if (reg > AD9739A_REG_MU_STAT1 && reg < AD9739A_REG_ANA_CNT_1) + return false; + + return true; +} + +static int ad9739a_reset(struct device *dev, const struct ad9739a_state *st) +{ + struct gpio_desc *gpio; + int ret; + + gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + if (gpio) { + /* minimum pulse width of 40ns */ + ndelay(40); + gpiod_set_value_cansleep(gpio, 0); + return 0; + } + + /* bring all registers to their default state */ + ret = regmap_set_bits(st->regmap, AD9739A_REG_MODE, AD9739A_RESET_MASK); + if (ret) + return ret; + + ndelay(40); + + return regmap_clear_bits(st->regmap, AD9739A_REG_MODE, + AD9739A_RESET_MASK); +} + +/* + * Recommended values (as per datasheet) for the dac clk common mode voltage + * and Mu controller. Look at table 29. + */ +static const struct reg_sequence ad9739a_clk_mu_ctrl[] = { + /* DAC clk common mode voltage */ + { AD9739A_REG_CROSS_CNT1, 0x0f }, + { AD9739A_REG_CROSS_CNT2, 0x0f }, + /* Mu controller configuration */ + { AD9739A_REG_PHS_DET, 0x30 }, + { AD9739A_REG_MU_DUTY, 0x80 }, + { AD9739A_REG_MU_CNT2, 0x44 }, + { AD9739A_REG_MU_CNT3, 0x6c }, +}; + +static int ad9739a_init(struct device *dev, const struct ad9739a_state *st) +{ + unsigned int i = 0, lock, fsc; + u32 fsc_raw; + int ret; + + ret = regmap_multi_reg_write(st->regmap, ad9739a_clk_mu_ctrl, + ARRAY_SIZE(ad9739a_clk_mu_ctrl)); + if (ret) + return ret; + + /* + * Try to get the Mu lock. Repeat the below steps AD9739A_LOCK_N_TRIES + * (as specified by the datasheet) until we get the lock. + */ + do { + ret = regmap_write(st->regmap, AD9739A_REG_MU_CNT4, + AD9739A_MU_CNT4_DEFAULT); + if (ret) + return ret; + + /* Enable the Mu controller search and track mode. */ + ret = regmap_set_bits(st->regmap, AD9739A_REG_MU_CNT1, + AD9739A_MU_EN_MASK); + if (ret) + return ret; + + /* Ensure the DLL loop is locked */ + ret = regmap_read_poll_timeout(st->regmap, AD9739A_REG_MU_STAT1, + lock, lock & AD9739A_MU_LOCK_MASK, + 0, 1000); + if (ret && ret != -ETIMEDOUT) + return ret; + } while (ret && ++i < AD9739A_LOCK_N_TRIES); + + if (i == AD9739A_LOCK_N_TRIES) + return dev_err_probe(dev, ret, "Mu lock timeout\n"); + + /* Receiver tracking and lock. Same deal as the Mu controller */ + i = 0; + do { + ret = regmap_update_bits(st->regmap, AD9739A_REG_LVDS_REC_CNT4, + AD9739A_FINE_DEL_SKW_MASK, + FIELD_PREP(AD9739A_FINE_DEL_SKW_MASK, 2)); + if (ret) + return ret; + + /* Disable the receiver and the loop. */ + ret = regmap_write(st->regmap, AD9739A_REG_LVDS_REC_CNT1, 0); + if (ret) + return ret; + + /* + * Re-enable the loop so it falls out of lock and begins the + * search/track routine again. + */ + ret = regmap_set_bits(st->regmap, AD9739A_REG_LVDS_REC_CNT1, + AD9739A_RCVR_LOOP_EN_MASK); + if (ret) + return ret; + + /* Ensure the DLL loop is locked */ + ret = regmap_read_poll_timeout(st->regmap, + AD9739A_REG_LVDS_REC_STAT9, lock, + lock == AD9739A_RCVR_TRACK_AND_LOCK, + 0, 1000); + if (ret && ret != -ETIMEDOUT) + return ret; + } while (ret && ++i < AD9739A_LOCK_N_TRIES); + + if (i == AD9739A_LOCK_N_TRIES) + return dev_err_probe(dev, ret, "Receiver lock timeout\n"); + + ret = device_property_read_u32(dev, "adi,full-scale-microamp", &fsc); + if (ret && ret == -EINVAL) + return 0; + if (ret) + return ret; + if (!in_range(fsc, AD9739A_FSC_MIN, AD9739A_FSC_RANGE)) + return dev_err_probe(dev, -EINVAL, + "Invalid full scale current(%u) [%u %u]\n", + fsc, AD9739A_FSC_MIN, AD9739A_FSC_MAX); + /* + * IOUTFS is given by + * Ioutfs = 0.0226 * FSC + 8.58 + * and is given in mA. Hence we'll have to multiply by 10 * MILLI in + * order to get rid of the fractional. + */ + fsc_raw = DIV_ROUND_CLOSEST(fsc * 10 - 85800, 226); + + ret = regmap_write(st->regmap, AD9739A_REG_FSC_1, fsc_raw & 0xff); + if (ret) + return ret; + + return regmap_update_bits(st->regmap, AD9739A_REG_FSC_2, + AD9739A_FSC_MSB, fsc_raw >> 8); +} + +static const char * const ad9739a_modes_avail[] = { "normal", "mixed-mode" }; + +static const struct iio_enum ad9739a_modes = { + .items = ad9739a_modes_avail, + .num_items = ARRAY_SIZE(ad9739a_modes_avail), + .get = ad9739a_oper_mode_get, + .set = ad9739a_oper_mode_set, +}; + +static const struct iio_chan_spec_ext_info ad9739a_ext_info[] = { + IIO_ENUM_AVAILABLE("operating_mode", IIO_SEPARATE, &ad9739a_modes), + IIO_ENUM("operating_mode", IIO_SEPARATE, &ad9739a_modes), + { } +}; + +/* + * The reason for having two different channels is because we have, in reality, + * two sources of data: + * ALTVOLTAGE: It's a Continuous Wave that's internally generated by the + * backend device. + * VOLTAGE: It's the typical data we can have in a DAC device and the source + * of it has nothing to do with the backend. The backend will only + * forward it into our data interface to be sent out. + */ +static struct iio_chan_spec ad9739a_channels[] = { + { + .type = IIO_ALTVOLTAGE, + .indexed = 1, + .output = 1, + .scan_index = -1, + }, + { + .type = IIO_VOLTAGE, + .indexed = 1, + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + .output = 1, + .ext_info = ad9739a_ext_info, + .scan_type = { + .sign = 's', + .storagebits = 16, + .realbits = 16, + }, + } +}; + +static const struct iio_info ad9739a_info = { + .read_raw = ad9739a_read_raw, +}; + +static const struct iio_buffer_setup_ops ad9739a_buffer_setup_ops = { + .preenable = &ad9739a_buffer_preenable, + .postdisable = &ad9739a_buffer_postdisable, +}; + +static const struct regmap_config ad9739a_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .readable_reg = ad9739a_reg_accessible, + .writeable_reg = ad9739a_reg_accessible, + .max_register = AD9739A_REG_ID, +}; + +static int ad9739a_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct iio_dev *indio_dev; + struct ad9739a_state *st; + unsigned int id; + struct clk *clk; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + + clk = devm_clk_get_enabled(dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(dev, PTR_ERR(clk), "Could not get clkin\n"); + + st->sample_rate = clk_get_rate(clk); + if (!in_range(st->sample_rate, AD9739A_MIN_DAC_CLK, + AD9739A_DAC_CLK_RANGE)) + return dev_err_probe(dev, -EINVAL, + "Invalid dac clk range(%lu) [%lu %lu]\n", + st->sample_rate, AD9739A_MIN_DAC_CLK, + AD9739A_MAX_DAC_CLK); + + st->regmap = devm_regmap_init_spi(spi, &ad9739a_regmap_config); + if (IS_ERR(st->regmap)) + return PTR_ERR(st->regmap); + + ret = regmap_read(st->regmap, AD9739A_REG_ID, &id); + if (ret) + return ret; + + if (id != AD9739A_ID) + dev_warn(dev, "Unrecognized CHIP_ID 0x%X", id); + + ret = ad9739a_reset(dev, st); + if (ret) + return ret; + + ret = ad9739a_init(dev, st); + if (ret) + return ret; + + st->back = devm_iio_backend_get(dev, NULL); + if (IS_ERR(st->back)) + return PTR_ERR(st->back); + + ret = devm_iio_backend_request_buffer(dev, st->back, indio_dev); + if (ret) + return ret; + + ret = iio_backend_extend_chan_spec(indio_dev, st->back, + &ad9739a_channels[0]); + if (ret) + return ret; + + ret = iio_backend_set_sampling_freq(st->back, 0, st->sample_rate); + if (ret) + return ret; + + ret = devm_iio_backend_enable(dev, st->back); + if (ret) + return ret; + + indio_dev->name = "ad9739a"; + indio_dev->info = &ad9739a_info; + indio_dev->channels = ad9739a_channels; + indio_dev->num_channels = ARRAY_SIZE(ad9739a_channels); + indio_dev->setup_ops = &ad9739a_buffer_setup_ops; + + return devm_iio_device_register(&spi->dev, indio_dev); +} + +static const struct of_device_id ad9739a_of_match[] = { + { .compatible = "adi,ad9739a" }, + {} +}; +MODULE_DEVICE_TABLE(of, ad9739a_of_match); + +static const struct spi_device_id ad9739a_id[] = { + {"ad9739a"}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad9739a_id); + +static struct spi_driver ad9739a_driver = { + .driver = { + .name = "ad9739a", + .of_match_table = ad9739a_of_match, + }, + .probe = ad9739a_probe, + .id_table = ad9739a_id, +}; +module_spi_driver(ad9739a_driver); + +MODULE_AUTHOR("Dragos Bogdan <dragos.bogdan@analog.com>"); +MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>"); +MODULE_DESCRIPTION("Analog Devices AD9739 DAC"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(IIO_BACKEND); diff --git a/drivers/iio/dac/adi-axi-dac.c b/drivers/iio/dac/adi-axi-dac.c new file mode 100644 index 00000000000000..9047c5aec0ff9d --- /dev/null +++ b/drivers/iio/dac/adi-axi-dac.c @@ -0,0 +1,635 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Analog Devices Generic AXI DAC IP core + * Link: https://wiki.analog.com/resources/fpga/docs/axi_dac_ip + * + * Copyright 2016-2024 Analog Devices Inc. + */ +#include <linux/bitfield.h> +#include <linux/bits.h> +#include <linux/cleanup.h> +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/limits.h> +#include <linux/kstrtox.h> +#include <linux/math.h> +#include <linux/math64.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/mutex.h> +#include <linux/platform_device.h> +#include <linux/property.h> +#include <linux/regmap.h> +#include <linux/units.h> + +#include <linux/fpga/adi-axi-common.h> +#include <linux/iio/backend.h> +#include <linux/iio/buffer-dmaengine.h> +#include <linux/iio/buffer.h> +#include <linux/iio/iio.h> + +/* + * Register definitions: + * https://wiki.analog.com/resources/fpga/docs/axi_dac_ip#register_map + */ + +/* Base controls */ +#define AXI_DAC_REG_CONFIG 0x0c +#define AXI_DDS_DISABLE BIT(6) + + /* DAC controls */ +#define AXI_DAC_REG_RSTN 0x0040 +#define AXI_DAC_RSTN_CE_N BIT(2) +#define AXI_DAC_RSTN_MMCM_RSTN BIT(1) +#define AXI_DAC_RSTN_RSTN BIT(0) +#define AXI_DAC_REG_CNTRL_1 0x0044 +#define AXI_DAC_SYNC BIT(0) +#define AXI_DAC_REG_CNTRL_2 0x0048 +#define ADI_DAC_R1_MODE BIT(4) +#define AXI_DAC_DRP_STATUS 0x0074 +#define AXI_DAC_DRP_LOCKED BIT(17) +/* DAC Channel controls */ +#define AXI_DAC_REG_CHAN_CNTRL_1(c) (0x0400 + (c) * 0x40) +#define AXI_DAC_REG_CHAN_CNTRL_3(c) (0x0408 + (c) * 0x40) +#define AXI_DAC_SCALE_SIGN BIT(15) +#define AXI_DAC_SCALE_INT BIT(14) +#define AXI_DAC_SCALE GENMASK(14, 0) +#define AXI_DAC_REG_CHAN_CNTRL_2(c) (0x0404 + (c) * 0x40) +#define AXI_DAC_REG_CHAN_CNTRL_4(c) (0x040c + (c) * 0x40) +#define AXI_DAC_PHASE GENMASK(31, 16) +#define AXI_DAC_FREQUENCY GENMASK(15, 0) +#define AXI_DAC_REG_CHAN_CNTRL_7(c) (0x0418 + (c) * 0x40) +#define AXI_DAC_DATA_SEL GENMASK(3, 0) + +/* 360 degrees in rad */ +#define AXI_DAC_2_PI_MEGA 6283190 +enum { + AXI_DAC_DATA_INTERNAL_TONE, + AXI_DAC_DATA_DMA = 2, +}; + +struct axi_dac_state { + struct regmap *regmap; + struct device *dev; + /* + * lock to protect multiple accesses to the device registers and global + * data/variables. + */ + struct mutex lock; + u64 dac_clk; + u32 reg_config; + bool int_tone; +}; + +static int axi_dac_enable(struct iio_backend *back) +{ + struct axi_dac_state *st = iio_backend_get_priv(back); + unsigned int __val; + int ret; + + guard(mutex)(&st->lock); + ret = regmap_set_bits(st->regmap, AXI_DAC_REG_RSTN, + AXI_DAC_RSTN_MMCM_RSTN); + if (ret) + return ret; + /* + * Make sure the DRP (Dynamic Reconfiguration Port) is locked. Not all + * designs really use it but if they don't we still get the lock bit + * set. So let's do it all the time so the code is generic. + */ + ret = regmap_read_poll_timeout(st->regmap, AXI_DAC_DRP_STATUS, __val, + __val & AXI_DAC_DRP_LOCKED, 100, 1000); + if (ret) + return ret; + + return regmap_set_bits(st->regmap, AXI_DAC_REG_RSTN, + AXI_DAC_RSTN_RSTN | AXI_DAC_RSTN_MMCM_RSTN); +} + +static void axi_dac_disable(struct iio_backend *back) +{ + struct axi_dac_state *st = iio_backend_get_priv(back); + + guard(mutex)(&st->lock); + regmap_write(st->regmap, AXI_DAC_REG_RSTN, 0); +} + +static struct iio_buffer *axi_dac_request_buffer(struct iio_backend *back, + struct iio_dev *indio_dev) +{ + struct axi_dac_state *st = iio_backend_get_priv(back); + const char *dma_name; + + if (device_property_read_string(st->dev, "dma-names", &dma_name)) + dma_name = "tx"; + + return iio_dmaengine_buffer_setup_ext(st->dev, indio_dev, dma_name, + IIO_BUFFER_DIRECTION_OUT); +} + +static void axi_dac_free_buffer(struct iio_backend *back, + struct iio_buffer *buffer) +{ + iio_dmaengine_buffer_free(buffer); +} + +enum { + AXI_DAC_FREQ_TONE_1, + AXI_DAC_FREQ_TONE_2, + AXI_DAC_SCALE_TONE_1, + AXI_DAC_SCALE_TONE_2, + AXI_DAC_PHASE_TONE_1, + AXI_DAC_PHASE_TONE_2, +}; + +static int __axi_dac_frequency_get(struct axi_dac_state *st, unsigned int chan, + unsigned int tone_2, unsigned int *freq) +{ + u32 reg, raw; + int ret; + + if (!st->dac_clk) { + dev_err(st->dev, "Sampling rate is 0...\n"); + return -EINVAL; + } + + if (tone_2) + reg = AXI_DAC_REG_CHAN_CNTRL_4(chan); + else + reg = AXI_DAC_REG_CHAN_CNTRL_2(chan); + + ret = regmap_read(st->regmap, reg, &raw); + if (ret) + return ret; + + raw = FIELD_GET(AXI_DAC_FREQUENCY, raw); + *freq = DIV_ROUND_CLOSEST_ULL(raw * st->dac_clk, BIT(16)); + + return 0; +} + +static int axi_dac_frequency_get(struct axi_dac_state *st, + const struct iio_chan_spec *chan, char *buf, + unsigned int tone_2) +{ + unsigned int freq; + int ret; + + scoped_guard(mutex, &st->lock) { + ret = __axi_dac_frequency_get(st, chan->channel, tone_2, &freq); + if (ret) + return ret; + } + + return sysfs_emit(buf, "%u\n", freq); +} + +static int axi_dac_scale_get(struct axi_dac_state *st, + const struct iio_chan_spec *chan, char *buf, + unsigned int tone_2) +{ + unsigned int scale, sign; + int ret, vals[2]; + u32 reg, raw; + + if (tone_2) + reg = AXI_DAC_REG_CHAN_CNTRL_3(chan->channel); + else + reg = AXI_DAC_REG_CHAN_CNTRL_1(chan->channel); + + ret = regmap_read(st->regmap, reg, &raw); + if (ret) + return ret; + + sign = FIELD_GET(AXI_DAC_SCALE_SIGN, raw); + raw = FIELD_GET(AXI_DAC_SCALE, raw); + scale = DIV_ROUND_CLOSEST_ULL((u64)raw * MEGA, AXI_DAC_SCALE_INT); + + vals[0] = scale / MEGA; + vals[1] = scale % MEGA; + + if (sign) { + vals[0] *= -1; + if (!vals[0]) + vals[1] *= -1; + } + + return iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, ARRAY_SIZE(vals), + vals); +} + +static int axi_dac_phase_get(struct axi_dac_state *st, + const struct iio_chan_spec *chan, char *buf, + unsigned int tone_2) +{ + u32 reg, raw, phase; + int ret, vals[2]; + + if (tone_2) + reg = AXI_DAC_REG_CHAN_CNTRL_4(chan->channel); + else + reg = AXI_DAC_REG_CHAN_CNTRL_2(chan->channel); + + ret = regmap_read(st->regmap, reg, &raw); + if (ret) + return ret; + + raw = FIELD_GET(AXI_DAC_PHASE, raw); + phase = DIV_ROUND_CLOSEST_ULL((u64)raw * AXI_DAC_2_PI_MEGA, U16_MAX); + + vals[0] = phase / MEGA; + vals[1] = phase % MEGA; + + return iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, ARRAY_SIZE(vals), + vals); +} + +static int __axi_dac_frequency_set(struct axi_dac_state *st, unsigned int chan, + u64 sample_rate, unsigned int freq, + unsigned int tone_2) +{ + u32 reg; + u16 raw; + int ret; + + if (!sample_rate || freq > sample_rate / 2) { + dev_err(st->dev, "Invalid frequency(%u) dac_clk(%llu)\n", + freq, sample_rate); + return -EINVAL; + } + + if (tone_2) + reg = AXI_DAC_REG_CHAN_CNTRL_4(chan); + else + reg = AXI_DAC_REG_CHAN_CNTRL_2(chan); + + raw = DIV64_U64_ROUND_CLOSEST((u64)freq * BIT(16), sample_rate); + + ret = regmap_update_bits(st->regmap, reg, AXI_DAC_FREQUENCY, raw); + if (ret) + return ret; + + /* synchronize channels */ + return regmap_set_bits(st->regmap, AXI_DAC_REG_CNTRL_1, AXI_DAC_SYNC); +} + +static int axi_dac_frequency_set(struct axi_dac_state *st, + const struct iio_chan_spec *chan, + const char *buf, size_t len, unsigned int tone_2) +{ + unsigned int freq; + int ret; + + ret = kstrtou32(buf, 10, &freq); + if (ret) + return ret; + + guard(mutex)(&st->lock); + ret = __axi_dac_frequency_set(st, chan->channel, st->dac_clk, freq, + tone_2); + if (ret) + return ret; + + return len; +} + +static int axi_dac_scale_set(struct axi_dac_state *st, + const struct iio_chan_spec *chan, + const char *buf, size_t len, unsigned int tone_2) +{ + int integer, frac, scale; + u32 raw = 0, reg; + int ret; + + ret = iio_str_to_fixpoint(buf, 100000, &integer, &frac); + if (ret) + return ret; + + scale = integer * MEGA + frac; + if (scale <= -2 * (int)MEGA || scale >= 2 * (int)MEGA) + return -EINVAL; + + /* format is 1.1.14 (sign, integer and fractional bits) */ + if (scale < 0) { + raw = FIELD_PREP(AXI_DAC_SCALE_SIGN, 1); + scale *= -1; + } + + raw |= div_u64((u64)scale * AXI_DAC_SCALE_INT, MEGA); + + if (tone_2) + reg = AXI_DAC_REG_CHAN_CNTRL_3(chan->channel); + else + reg = AXI_DAC_REG_CHAN_CNTRL_1(chan->channel); + + guard(mutex)(&st->lock); + ret = regmap_write(st->regmap, reg, raw); + if (ret) + return ret; + + /* synchronize channels */ + ret = regmap_set_bits(st->regmap, AXI_DAC_REG_CNTRL_1, AXI_DAC_SYNC); + if (ret) + return ret; + + return len; +} + +static int axi_dac_phase_set(struct axi_dac_state *st, + const struct iio_chan_spec *chan, + const char *buf, size_t len, unsigned int tone_2) +{ + int integer, frac, phase; + u32 raw, reg; + int ret; + + ret = iio_str_to_fixpoint(buf, 100000, &integer, &frac); + if (ret) + return ret; + + phase = integer * MEGA + frac; + if (phase < 0 || phase > AXI_DAC_2_PI_MEGA) + return -EINVAL; + + raw = DIV_ROUND_CLOSEST_ULL((u64)phase * U16_MAX, AXI_DAC_2_PI_MEGA); + + if (tone_2) + reg = AXI_DAC_REG_CHAN_CNTRL_4(chan->channel); + else + reg = AXI_DAC_REG_CHAN_CNTRL_2(chan->channel); + + guard(mutex)(&st->lock); + ret = regmap_update_bits(st->regmap, reg, AXI_DAC_PHASE, + FIELD_PREP(AXI_DAC_PHASE, raw)); + if (ret) + return ret; + + /* synchronize channels */ + ret = regmap_set_bits(st->regmap, AXI_DAC_REG_CNTRL_1, AXI_DAC_SYNC); + if (ret) + return ret; + + return len; +} + +static int axi_dac_ext_info_set(struct iio_backend *back, uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len) +{ + struct axi_dac_state *st = iio_backend_get_priv(back); + + switch (private) { + case AXI_DAC_FREQ_TONE_1: + case AXI_DAC_FREQ_TONE_2: + return axi_dac_frequency_set(st, chan, buf, len, + private - AXI_DAC_FREQ_TONE_1); + case AXI_DAC_SCALE_TONE_1: + case AXI_DAC_SCALE_TONE_2: + return axi_dac_scale_set(st, chan, buf, len, + private - AXI_DAC_SCALE_TONE_1); + case AXI_DAC_PHASE_TONE_1: + case AXI_DAC_PHASE_TONE_2: + return axi_dac_phase_set(st, chan, buf, len, + private - AXI_DAC_PHASE_TONE_2); + default: + return -EOPNOTSUPP; + } +} + +static int axi_dac_ext_info_get(struct iio_backend *back, uintptr_t private, + const struct iio_chan_spec *chan, char *buf) +{ + struct axi_dac_state *st = iio_backend_get_priv(back); + + switch (private) { + case AXI_DAC_FREQ_TONE_1: + case AXI_DAC_FREQ_TONE_2: + return axi_dac_frequency_get(st, chan, buf, + private - AXI_DAC_FREQ_TONE_1); + case AXI_DAC_SCALE_TONE_1: + case AXI_DAC_SCALE_TONE_2: + return axi_dac_scale_get(st, chan, buf, + private - AXI_DAC_SCALE_TONE_1); + case AXI_DAC_PHASE_TONE_1: + case AXI_DAC_PHASE_TONE_2: + return axi_dac_phase_get(st, chan, buf, + private - AXI_DAC_PHASE_TONE_1); + default: + return -EOPNOTSUPP; + } +} + +static const struct iio_chan_spec_ext_info axi_dac_ext_info[] = { + IIO_BACKEND_EX_INFO("frequency0", IIO_SEPARATE, AXI_DAC_FREQ_TONE_1), + IIO_BACKEND_EX_INFO("frequency1", IIO_SEPARATE, AXI_DAC_FREQ_TONE_2), + IIO_BACKEND_EX_INFO("scale0", IIO_SEPARATE, AXI_DAC_SCALE_TONE_1), + IIO_BACKEND_EX_INFO("scale1", IIO_SEPARATE, AXI_DAC_SCALE_TONE_2), + IIO_BACKEND_EX_INFO("phase0", IIO_SEPARATE, AXI_DAC_PHASE_TONE_1), + IIO_BACKEND_EX_INFO("phase1", IIO_SEPARATE, AXI_DAC_PHASE_TONE_2), + {} +}; + +static int axi_dac_extend_chan(struct iio_backend *back, + struct iio_chan_spec *chan) +{ + struct axi_dac_state *st = iio_backend_get_priv(back); + + if (chan->type != IIO_ALTVOLTAGE) + return -EINVAL; + if (st->reg_config & AXI_DDS_DISABLE) + /* nothing to extend */ + return 0; + + chan->ext_info = axi_dac_ext_info; + + return 0; +} + +static int axi_dac_data_source_set(struct iio_backend *back, unsigned int chan, + enum iio_backend_data_source data) +{ + struct axi_dac_state *st = iio_backend_get_priv(back); + + switch (data) { + case IIO_BACKEND_INTERNAL_CONTINUOS_WAVE: + return regmap_update_bits(st->regmap, + AXI_DAC_REG_CHAN_CNTRL_7(chan), + AXI_DAC_DATA_SEL, + AXI_DAC_DATA_INTERNAL_TONE); + case IIO_BACKEND_EXTERNAL: + return regmap_update_bits(st->regmap, + AXI_DAC_REG_CHAN_CNTRL_7(chan), + AXI_DAC_DATA_SEL, AXI_DAC_DATA_DMA); + default: + return -EINVAL; + } +} + +static int axi_dac_set_sample_rate(struct iio_backend *back, unsigned int chan, + u64 sample_rate) +{ + struct axi_dac_state *st = iio_backend_get_priv(back); + unsigned int freq; + int ret, tone; + + if (!sample_rate) + return -EINVAL; + if (st->reg_config & AXI_DDS_DISABLE) + /* sample_rate has no meaning if DDS is disabled */ + return 0; + + guard(mutex)(&st->lock); + /* + * If dac_clk is 0 then this must be the first time we're being notified + * about the interface sample rate. Hence, just update our internal + * variable and bail... If it's not 0, then we get the current DDS + * frequency (for the old rate) and update the registers for the new + * sample rate. + */ + if (!st->dac_clk) { + st->dac_clk = sample_rate; + return 0; + } + + for (tone = 0; tone <= AXI_DAC_FREQ_TONE_2; tone++) { + ret = __axi_dac_frequency_get(st, chan, tone, &freq); + if (ret) + return ret; + + ret = __axi_dac_frequency_set(st, chan, sample_rate, tone, freq); + if (ret) + return ret; + } + + st->dac_clk = sample_rate; + + return 0; +} + +static const struct iio_backend_ops axi_dac_generic = { + .enable = axi_dac_enable, + .disable = axi_dac_disable, + .request_buffer = axi_dac_request_buffer, + .free_buffer = axi_dac_free_buffer, + .extend_chan_spec = axi_dac_extend_chan, + .ext_info_set = axi_dac_ext_info_set, + .ext_info_get = axi_dac_ext_info_get, + .data_source_set = axi_dac_data_source_set, + .set_sample_rate = axi_dac_set_sample_rate, +}; + +static const struct regmap_config axi_dac_regmap_config = { + .val_bits = 32, + .reg_bits = 32, + .reg_stride = 4, + .max_register = 0x0800, +}; + +static int axi_dac_probe(struct platform_device *pdev) +{ + const unsigned int *expected_ver; + struct axi_dac_state *st; + void __iomem *base; + unsigned int ver; + struct clk *clk; + int ret; + + st = devm_kzalloc(&pdev->dev, sizeof(*st), GFP_KERNEL); + if (!st) + return -ENOMEM; + + expected_ver = device_get_match_data(&pdev->dev); + if (!expected_ver) + return -ENODEV; + + clk = devm_clk_get_enabled(&pdev->dev, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + st->dev = &pdev->dev; + st->regmap = devm_regmap_init_mmio(&pdev->dev, base, + &axi_dac_regmap_config); + if (IS_ERR(st->regmap)) + return PTR_ERR(st->regmap); + + /* + * Force disable the core. Up to the frontend to enable us. And we can + * still read/write registers... + */ + ret = regmap_write(st->regmap, AXI_DAC_REG_RSTN, 0); + if (ret) + return ret; + + ret = regmap_read(st->regmap, ADI_AXI_REG_VERSION, &ver); + if (ret) + return ret; + + if (ADI_AXI_PCORE_VER_MAJOR(ver) != ADI_AXI_PCORE_VER_MAJOR(*expected_ver)) { + dev_err(&pdev->dev, + "Major version mismatch. Expected %d.%.2d.%c, Reported %d.%.2d.%c\n", + ADI_AXI_PCORE_VER_MAJOR(*expected_ver), + ADI_AXI_PCORE_VER_MINOR(*expected_ver), + ADI_AXI_PCORE_VER_PATCH(*expected_ver), + ADI_AXI_PCORE_VER_MAJOR(ver), + ADI_AXI_PCORE_VER_MINOR(ver), + ADI_AXI_PCORE_VER_PATCH(ver)); + return -ENODEV; + } + + /* Let's get the core read only configuration */ + ret = regmap_read(st->regmap, AXI_DAC_REG_CONFIG, &st->reg_config); + if (ret) + return ret; + + /* + * In some designs, setting the R1_MODE bit to 0 (which is the default + * value) causes all channels of the frontend to be routed to the same + * DMA (so they are sampled together). This is for things like + * Multiple-Input and Multiple-Output (MIMO). As most of the times we + * want independent channels let's override the core's default value and + * set the R1_MODE bit. + */ + ret = regmap_set_bits(st->regmap, AXI_DAC_REG_CNTRL_2, ADI_DAC_R1_MODE); + if (ret) + return ret; + + mutex_init(&st->lock); + ret = devm_iio_backend_register(&pdev->dev, &axi_dac_generic, st); + if (ret) + return ret; + + dev_info(&pdev->dev, "AXI DAC IP core (%d.%.2d.%c) probed\n", + ADI_AXI_PCORE_VER_MAJOR(ver), + ADI_AXI_PCORE_VER_MINOR(ver), + ADI_AXI_PCORE_VER_PATCH(ver)); + + return 0; +} + +static unsigned int axi_dac_9_1_b_info = ADI_AXI_PCORE_VER(9, 1, 'b'); + +static const struct of_device_id axi_dac_of_match[] = { + { .compatible = "adi,axi-dac-9.1.b", .data = &axi_dac_9_1_b_info }, + {} +}; +MODULE_DEVICE_TABLE(of, axi_dac_of_match); + +static struct platform_driver axi_dac_driver = { + .driver = { + .name = "adi-axi-dac", + .of_match_table = axi_dac_of_match, + }, + .probe = axi_dac_probe, +}; +module_platform_driver(axi_dac_driver); + +MODULE_AUTHOR("Nuno Sa <nuno.sa@analog.com>"); +MODULE_DESCRIPTION("Analog Devices Generic AXI DAC IP core driver"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(IIO_DMAENGINE_BUFFER); +MODULE_IMPORT_NS(IIO_BACKEND); diff --git a/drivers/iio/dac/ltc2688.c b/drivers/iio/dac/ltc2688.c index fc8eb53c65be3b..c4b1ba30f93545 100644 --- a/drivers/iio/dac/ltc2688.c +++ b/drivers/iio/dac/ltc2688.c @@ -746,26 +746,21 @@ static int ltc2688_span_lookup(const struct ltc2688_state *st, int min, int max) static int ltc2688_channel_config(struct ltc2688_state *st) { struct device *dev = &st->spi->dev; - struct fwnode_handle *child; u32 reg, clk_input, val, tmp[2]; int ret, span; - device_for_each_child_node(dev, child) { + device_for_each_child_node_scoped(dev, child) { struct ltc2688_chan *chan; ret = fwnode_property_read_u32(child, "reg", ®); - if (ret) { - fwnode_handle_put(child); + if (ret) return dev_err_probe(dev, ret, "Failed to get reg property\n"); - } - if (reg >= LTC2688_DAC_CHANNELS) { - fwnode_handle_put(child); + if (reg >= LTC2688_DAC_CHANNELS) return dev_err_probe(dev, -EINVAL, "reg bigger than: %d\n", LTC2688_DAC_CHANNELS); - } val = 0; chan = &st->channels[reg]; @@ -786,12 +781,10 @@ static int ltc2688_channel_config(struct ltc2688_state *st) if (!ret) { span = ltc2688_span_lookup(st, (int)tmp[0] / 1000, tmp[1] / 1000); - if (span < 0) { - fwnode_handle_put(child); - return dev_err_probe(dev, -EINVAL, + if (span < 0) + return dev_err_probe(dev, span, "output range not valid:[%d %d]\n", tmp[0], tmp[1]); - } val |= FIELD_PREP(LTC2688_CH_SPAN_MSK, span); } @@ -800,17 +793,14 @@ static int ltc2688_channel_config(struct ltc2688_state *st) &clk_input); if (!ret) { if (clk_input >= LTC2688_CH_TGP_MAX) { - fwnode_handle_put(child); return dev_err_probe(dev, -EINVAL, "toggle-dither-input inv value(%d)\n", clk_input); } ret = ltc2688_tgp_clk_setup(st, chan, child, clk_input); - if (ret) { - fwnode_handle_put(child); + if (ret) return ret; - } /* * 0 means software toggle which is the default mode. @@ -844,11 +834,9 @@ static int ltc2688_channel_config(struct ltc2688_state *st) ret = regmap_write(st->regmap, LTC2688_CMD_CH_SETTING(reg), val); - if (ret) { - fwnode_handle_put(child); - return dev_err_probe(dev, -EINVAL, + if (ret) + return dev_err_probe(dev, ret, "failed to set chan settings\n"); - } } return 0; diff --git a/drivers/iio/dac/ti-dac5571.c b/drivers/iio/dac/ti-dac5571.c index efb1269a77c1e5..c5162b72951af6 100644 --- a/drivers/iio/dac/ti-dac5571.c +++ b/drivers/iio/dac/ti-dac5571.c @@ -13,6 +13,7 @@ * https://www.ti.com/lit/ds/symlink/dac5573.pdf * https://www.ti.com/lit/ds/symlink/dac6573.pdf * https://www.ti.com/lit/ds/symlink/dac7573.pdf + * https://www.ti.com/lit/ds/symlink/dac081c081.pdf * https://www.ti.com/lit/ds/symlink/dac121c081.pdf */ @@ -386,6 +387,7 @@ static void dac5571_remove(struct i2c_client *i2c) } static const struct of_device_id dac5571_of_id[] = { + {.compatible = "ti,dac081c081", .data = &dac5571_spec[single_8bit] }, {.compatible = "ti,dac121c081", .data = &dac5571_spec[single_12bit] }, {.compatible = "ti,dac5571", .data = &dac5571_spec[single_8bit] }, {.compatible = "ti,dac6571", .data = &dac5571_spec[single_10bit] }, @@ -401,6 +403,7 @@ static const struct of_device_id dac5571_of_id[] = { MODULE_DEVICE_TABLE(of, dac5571_of_id); static const struct i2c_device_id dac5571_id[] = { + {"dac081c081", (kernel_ulong_t)&dac5571_spec[single_8bit] }, {"dac121c081", (kernel_ulong_t)&dac5571_spec[single_12bit] }, {"dac5571", (kernel_ulong_t)&dac5571_spec[single_8bit] }, {"dac6571", (kernel_ulong_t)&dac5571_spec[single_10bit] }, diff --git a/drivers/iio/frequency/admfm2000.c b/drivers/iio/frequency/admfm2000.c index c34d79e55a7c58..b2263b9afeda33 100644 --- a/drivers/iio/frequency/admfm2000.c +++ b/drivers/iio/frequency/admfm2000.c @@ -160,26 +160,21 @@ static int admfm2000_channel_config(struct admfm2000_state *st, { struct platform_device *pdev = to_platform_device(indio_dev->dev.parent); struct device *dev = &pdev->dev; - struct fwnode_handle *child; struct gpio_desc **dsa; struct gpio_desc **sw; int ret, i; bool mode; u32 reg; - device_for_each_child_node(dev, child) { + device_for_each_child_node_scoped(dev, child) { ret = fwnode_property_read_u32(child, "reg", ®); - if (ret) { - fwnode_handle_put(child); + if (ret) return dev_err_probe(dev, ret, "Failed to get reg property\n"); - } - if (reg >= indio_dev->num_channels) { - fwnode_handle_put(child); + if (reg >= indio_dev->num_channels) return dev_err_probe(dev, -EINVAL, "reg bigger than: %d\n", indio_dev->num_channels); - } if (fwnode_property_present(child, "adi,mixer-mode")) mode = ADMFM2000_MIXER_MODE; @@ -196,36 +191,29 @@ static int admfm2000_channel_config(struct admfm2000_state *st, dsa = st->dsa2_gpios; break; default: - fwnode_handle_put(child); return -EINVAL; } for (i = 0; i < ADMFM2000_MODE_GPIOS; i++) { sw[i] = devm_fwnode_gpiod_get_index(dev, child, "switch", i, GPIOD_OUT_LOW, NULL); - if (IS_ERR(sw[i])) { - fwnode_handle_put(child); + if (IS_ERR(sw[i])) return dev_err_probe(dev, PTR_ERR(sw[i]), "Failed to get gpios\n"); - } } for (i = 0; i < ADMFM2000_DSA_GPIOS; i++) { dsa[i] = devm_fwnode_gpiod_get_index(dev, child, "attenuation", i, GPIOD_OUT_LOW, NULL); - if (IS_ERR(dsa[i])) { - fwnode_handle_put(child); + if (IS_ERR(dsa[i])) return dev_err_probe(dev, PTR_ERR(dsa[i]), "Failed to get gpios\n"); - } } ret = admfm2000_mode(indio_dev, reg, mode); - if (ret) { - fwnode_handle_put(child); + if (ret) return ret; - } } return 0; diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c index 37e619827e8a11..6616729af5b779 100644 --- a/drivers/iio/health/max30102.c +++ b/drivers/iio/health/max30102.c @@ -613,6 +613,7 @@ static void max30102_remove(struct i2c_client *client) } static const struct i2c_device_id max30102_id[] = { + { "max30101", max30105 }, { "max30102", max30102 }, { "max30105", max30105 }, {} @@ -620,6 +621,7 @@ static const struct i2c_device_id max30102_id[] = { MODULE_DEVICE_TABLE(i2c, max30102_id); static const struct of_device_id max30102_dt_ids[] = { + { .compatible = "maxim,max30101" }, { .compatible = "maxim,max30102" }, { .compatible = "maxim,max30105" }, { } diff --git a/drivers/iio/humidity/hdc3020.c b/drivers/iio/humidity/hdc3020.c index 1e5d0d4797b16e..cdc4789213ba70 100644 --- a/drivers/iio/humidity/hdc3020.c +++ b/drivers/iio/humidity/hdc3020.c @@ -15,11 +15,14 @@ #include <linux/cleanup.h> #include <linux/crc8.h> #include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/pm.h> +#include <linux/regulator/consumer.h> #include <linux/units.h> #include <asm/unaligned.h> @@ -68,6 +71,8 @@ struct hdc3020_data { struct i2c_client *client; + struct gpio_desc *reset_gpio; + struct regulator *vdd_supply; /* * Ensure that the sensor configuration (currently only heater is * supported) will not be changed during the process of reading @@ -551,9 +556,53 @@ static const struct iio_info hdc3020_info = { .write_event_value = hdc3020_write_thresh, }; -static void hdc3020_stop(void *data) +static int hdc3020_power_off(struct hdc3020_data *data) { - hdc3020_exec_cmd((struct hdc3020_data *)data, HDC3020_EXIT_AUTO); + hdc3020_exec_cmd(data, HDC3020_EXIT_AUTO); + + if (data->reset_gpio) + gpiod_set_value_cansleep(data->reset_gpio, 1); + + return regulator_disable(data->vdd_supply); +} + +static int hdc3020_power_on(struct hdc3020_data *data) +{ + int ret; + + ret = regulator_enable(data->vdd_supply); + if (ret) + return ret; + + fsleep(5000); + + if (data->reset_gpio) { + gpiod_set_value_cansleep(data->reset_gpio, 0); + fsleep(3000); + } + + if (data->client->irq) { + /* + * The alert output is activated by default upon power up, + * hardware reset, and soft reset. Clear the status register. + */ + ret = hdc3020_exec_cmd(data, HDC3020_S_STATUS); + if (ret) { + hdc3020_power_off(data); + return ret; + } + } + + ret = hdc3020_exec_cmd(data, HDC3020_S_AUTO_10HZ_MOD0); + if (ret) + hdc3020_power_off(data); + + return ret; +} + +static void hdc3020_exit(void *data) +{ + hdc3020_power_off(data); } static int hdc3020_probe(struct i2c_client *client) @@ -569,6 +618,8 @@ static int hdc3020_probe(struct i2c_client *client) if (!indio_dev) return -ENOMEM; + dev_set_drvdata(&client->dev, indio_dev); + data = iio_priv(indio_dev); data->client = client; mutex_init(&data->lock); @@ -580,6 +631,26 @@ static int hdc3020_probe(struct i2c_client *client) indio_dev->info = &hdc3020_info; indio_dev->channels = hdc3020_channels; indio_dev->num_channels = ARRAY_SIZE(hdc3020_channels); + + data->vdd_supply = devm_regulator_get(&client->dev, "vdd"); + if (IS_ERR(data->vdd_supply)) + return dev_err_probe(&client->dev, PTR_ERR(data->vdd_supply), + "Unable to get VDD regulator\n"); + + data->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(data->reset_gpio)) + return dev_err_probe(&client->dev, PTR_ERR(data->reset_gpio), + "Cannot get reset GPIO\n"); + + ret = hdc3020_power_on(data); + if (ret) + return dev_err_probe(&client->dev, ret, "Power on failed\n"); + + ret = devm_add_action_or_reset(&data->client->dev, hdc3020_exit, data); + if (ret) + return ret; + if (client->irq) { ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, hdc3020_interrupt_handler, @@ -588,25 +659,8 @@ static int hdc3020_probe(struct i2c_client *client) if (ret) return dev_err_probe(&client->dev, ret, "Failed to request IRQ\n"); - - /* - * The alert output is activated by default upon power up, - * hardware reset, and soft reset. Clear the status register. - */ - ret = hdc3020_exec_cmd(data, HDC3020_S_STATUS); - if (ret) - return ret; } - ret = hdc3020_exec_cmd(data, HDC3020_S_AUTO_10HZ_MOD0); - if (ret) - return dev_err_probe(&client->dev, ret, - "Unable to set up measurement\n"); - - ret = devm_add_action_or_reset(&data->client->dev, hdc3020_stop, data); - if (ret) - return ret; - ret = devm_iio_device_register(&data->client->dev, indio_dev); if (ret) return dev_err_probe(&client->dev, ret, "Failed to add device"); @@ -614,6 +668,24 @@ static int hdc3020_probe(struct i2c_client *client) return 0; } +static int hdc3020_suspend(struct device *dev) +{ + struct iio_dev *iio_dev = dev_get_drvdata(dev); + struct hdc3020_data *data = iio_priv(iio_dev); + + return hdc3020_power_off(data); +} + +static int hdc3020_resume(struct device *dev) +{ + struct iio_dev *iio_dev = dev_get_drvdata(dev); + struct hdc3020_data *data = iio_priv(iio_dev); + + return hdc3020_power_on(data); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(hdc3020_pm_ops, hdc3020_suspend, hdc3020_resume); + static const struct i2c_device_id hdc3020_id[] = { { "hdc3020" }, { "hdc3021" }, @@ -633,6 +705,7 @@ MODULE_DEVICE_TABLE(of, hdc3020_dt_ids); static struct i2c_driver hdc3020_driver = { .driver = { .name = "hdc3020", + .pm = pm_sleep_ptr(&hdc3020_pm_ops), .of_match_table = hdc3020_dt_ids, }, .probe = hdc3020_probe, diff --git a/drivers/iio/humidity/hts221_core.c b/drivers/iio/humidity/hts221_core.c index 2a413da87b760f..87627d116eff05 100644 --- a/drivers/iio/humidity/hts221_core.c +++ b/drivers/iio/humidity/hts221_core.c @@ -573,7 +573,7 @@ int hts221_probe(struct device *dev, int irq, const char *name, if (!iio_dev) return -ENOMEM; - dev_set_drvdata(dev, (void *)iio_dev); + dev_set_drvdata(dev, iio_dev); hw = iio_priv(iio_dev); hw->name = name; diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600.h b/drivers/iio/imu/inv_icm42600/inv_icm42600.h index 0e290c807b0f91..0566340b266049 100644 --- a/drivers/iio/imu/inv_icm42600/inv_icm42600.h +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600.h @@ -22,6 +22,7 @@ enum inv_icm42600_chip { INV_CHIP_ICM42602, INV_CHIP_ICM42605, INV_CHIP_ICM42622, + INV_CHIP_ICM42688, INV_CHIP_ICM42631, INV_CHIP_NB, }; @@ -304,6 +305,7 @@ struct inv_icm42600_state { #define INV_ICM42600_WHOAMI_ICM42602 0x41 #define INV_ICM42600_WHOAMI_ICM42605 0x42 #define INV_ICM42600_WHOAMI_ICM42622 0x46 +#define INV_ICM42600_WHOAMI_ICM42688 0x47 #define INV_ICM42600_WHOAMI_ICM42631 0x5C /* User bank 1 (MSB 0x10) */ diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c index a5e81906e37ecf..82e0a2e2ad706c 100644 --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c @@ -87,6 +87,11 @@ static const struct inv_icm42600_hw inv_icm42600_hw[INV_CHIP_NB] = { .name = "icm42622", .conf = &inv_icm42600_default_conf, }, + [INV_CHIP_ICM42688] = { + .whoami = INV_ICM42600_WHOAMI_ICM42688, + .name = "icm42688", + .conf = &inv_icm42600_default_conf, + }, [INV_CHIP_ICM42631] = { .whoami = INV_ICM42600_WHOAMI_ICM42631, .name = "icm42631", diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c index 1af559403ba66d..ebb28f84ba9853 100644 --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c @@ -85,6 +85,9 @@ static const struct of_device_id inv_icm42600_of_matches[] = { .compatible = "invensense,icm42622", .data = (void *)INV_CHIP_ICM42622, }, { + .compatible = "invensense,icm42688", + .data = (void *)INV_CHIP_ICM42688, + }, { .compatible = "invensense,icm42631", .data = (void *)INV_CHIP_ICM42631, }, diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c index 6be4ac79493794..50217a10e0bbf3 100644 --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c @@ -81,6 +81,9 @@ static const struct of_device_id inv_icm42600_of_matches[] = { .compatible = "invensense,icm42622", .data = (void *)INV_CHIP_ICM42622, }, { + .compatible = "invensense,icm42688", + .data = (void *)INV_CHIP_ICM42688, + }, { .compatible = "invensense,icm42631", .data = (void *)INV_CHIP_ICM42631, }, diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index 0e94e5335e9371..14d95f34e981c8 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -15,6 +15,8 @@ #include <linux/acpi.h> #include <linux/platform_device.h> #include <linux/regulator/consumer.h> +#include <linux/math64.h> +#include <linux/minmax.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/property.h> @@ -287,7 +289,7 @@ static const struct inv_mpu6050_hw hw_info[] = { }; static int inv_mpu6050_pwr_mgmt_1_write(struct inv_mpu6050_state *st, bool sleep, - int clock, int temp_dis) + bool cycle, int clock, int temp_dis) { u8 val; @@ -301,6 +303,8 @@ static int inv_mpu6050_pwr_mgmt_1_write(struct inv_mpu6050_state *st, bool sleep val |= INV_MPU6050_BIT_TEMP_DIS; if (sleep) val |= INV_MPU6050_BIT_SLEEP; + if (cycle) + val |= INV_MPU6050_BIT_CYCLE; dev_dbg(regmap_get_device(st->map), "pwr_mgmt_1: 0x%x\n", val); return regmap_write(st->map, st->reg->pwr_mgmt_1, val); @@ -316,7 +320,7 @@ static int inv_mpu6050_clock_switch(struct inv_mpu6050_state *st, case INV_MPU6000: case INV_MPU9150: /* old chips: switch clock manually */ - ret = inv_mpu6050_pwr_mgmt_1_write(st, false, clock, -1); + ret = inv_mpu6050_pwr_mgmt_1_write(st, false, false, clock, -1); if (ret) return ret; st->chip_config.clk = clock; @@ -332,7 +336,7 @@ static int inv_mpu6050_clock_switch(struct inv_mpu6050_state *st, int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, unsigned int mask) { - unsigned int sleep; + unsigned int sleep, val; u8 pwr_mgmt2, user_ctrl; int ret; @@ -345,12 +349,20 @@ int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, mask &= ~INV_MPU6050_SENSOR_TEMP; if (mask & INV_MPU6050_SENSOR_MAGN && en == st->chip_config.magn_en) mask &= ~INV_MPU6050_SENSOR_MAGN; + if (mask & INV_MPU6050_SENSOR_WOM && en == st->chip_config.wom_en) + mask &= ~INV_MPU6050_SENSOR_WOM; + + /* force accel on if WoM is on and not going off */ + if (!en && (mask & INV_MPU6050_SENSOR_ACCL) && st->chip_config.wom_en && + !(mask & INV_MPU6050_SENSOR_WOM)) + mask &= ~INV_MPU6050_SENSOR_ACCL; + if (mask == 0) return 0; /* turn on/off temperature sensor */ if (mask & INV_MPU6050_SENSOR_TEMP) { - ret = inv_mpu6050_pwr_mgmt_1_write(st, false, -1, !en); + ret = inv_mpu6050_pwr_mgmt_1_write(st, false, false, -1, !en); if (ret) return ret; st->chip_config.temp_en = en; @@ -439,6 +451,16 @@ int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, } } + /* enable/disable accel intelligence control */ + if (mask & INV_MPU6050_SENSOR_WOM) { + val = en ? INV_MPU6500_BIT_ACCEL_INTEL_EN | + INV_MPU6500_BIT_ACCEL_INTEL_MODE : 0; + ret = regmap_write(st->map, INV_MPU6500_REG_ACCEL_INTEL_CTRL, val); + if (ret) + return ret; + st->chip_config.wom_en = en; + } + return 0; } @@ -447,7 +469,7 @@ static int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, { int result; - result = inv_mpu6050_pwr_mgmt_1_write(st, !power_on, -1, -1); + result = inv_mpu6050_pwr_mgmt_1_write(st, !power_on, false, -1, -1); if (result) return result; @@ -477,22 +499,9 @@ static int inv_mpu6050_set_gyro_fsr(struct inv_mpu6050_state *st, return regmap_write(st->map, st->reg->gyro_config, data); } -/* - * inv_mpu6050_set_lpf_regs() - set low pass filter registers, chip dependent - * - * MPU60xx/MPU9150 use only 1 register for accelerometer + gyroscope - * MPU6500 and above have a dedicated register for accelerometer - */ -static int inv_mpu6050_set_lpf_regs(struct inv_mpu6050_state *st, - enum inv_mpu6050_filter_e val) +static int inv_mpu6050_set_accel_lpf_regs(struct inv_mpu6050_state *st, + enum inv_mpu6050_filter_e val) { - int result; - - result = regmap_write(st->map, st->reg->lpf, val); - if (result) - return result; - - /* set accel lpf */ switch (st->chip_type) { case INV_MPU6050: case INV_MPU6000: @@ -512,6 +521,25 @@ static int inv_mpu6050_set_lpf_regs(struct inv_mpu6050_state *st, } /* + * inv_mpu6050_set_lpf_regs() - set low pass filter registers, chip dependent + * + * MPU60xx/MPU9150 use only 1 register for accelerometer + gyroscope + * MPU6500 and above have a dedicated register for accelerometer + */ +static int inv_mpu6050_set_lpf_regs(struct inv_mpu6050_state *st, + enum inv_mpu6050_filter_e val) +{ + int result; + + result = regmap_write(st->map, st->reg->lpf, val); + if (result) + return result; + + /* set accel lpf */ + return inv_mpu6050_set_accel_lpf_regs(st, val); +} + +/* * inv_mpu6050_init_config() - Initialize hardware, disable FIFO. * * Initial configuration: @@ -893,6 +921,317 @@ error_write_raw_unlock: return result; } +static u64 inv_mpu6050_convert_wom_to_roc(unsigned int threshold, unsigned int freq_div) +{ + /* 4mg per LSB converted in m/s² in micro (1000000) */ + const unsigned int convert = 4U * 9807U; + u64 value; + + value = threshold * convert; + + /* compute the differential by multiplying by the frequency */ + return div_u64(value * INV_MPU6050_INTERNAL_FREQ_HZ, freq_div); +} + +static unsigned int inv_mpu6050_convert_roc_to_wom(u64 roc, unsigned int freq_div) +{ + /* 4mg per LSB converted in m/s² in micro (1000000) */ + const unsigned int convert = 4U * 9807U; + u64 value; + + /* return 0 only if roc is 0 */ + if (roc == 0) + return 0; + + value = div_u64(roc * freq_div, convert * INV_MPU6050_INTERNAL_FREQ_HZ); + + /* limit value to 8 bits and prevent 0 */ + return min(255, max(1, value)); +} + +static int inv_mpu6050_set_wom_int(struct inv_mpu6050_state *st, bool on) +{ + unsigned int reg_val, val; + + switch (st->chip_type) { + case INV_MPU6050: + case INV_MPU6500: + case INV_MPU6515: + case INV_MPU6880: + case INV_MPU6000: + case INV_MPU9150: + case INV_MPU9250: + case INV_MPU9255: + reg_val = INV_MPU6500_BIT_WOM_INT_EN; + break; + default: + reg_val = INV_ICM20608_BIT_WOM_INT_EN; + break; + } + + val = on ? reg_val : 0; + + return regmap_update_bits(st->map, st->reg->int_enable, reg_val, val); +} + +static int inv_mpu6050_set_wom_threshold(struct inv_mpu6050_state *st, u64 value, + unsigned int freq_div) +{ + unsigned int threshold; + int result; + + /* convert roc to wom threshold and convert back to handle clipping */ + threshold = inv_mpu6050_convert_roc_to_wom(value, freq_div); + value = inv_mpu6050_convert_wom_to_roc(threshold, freq_div); + + dev_dbg(regmap_get_device(st->map), "wom_threshold: 0x%x\n", threshold); + + switch (st->chip_type) { + case INV_ICM20609: + case INV_ICM20689: + case INV_ICM20600: + case INV_ICM20602: + case INV_ICM20690: + st->data[0] = threshold; + st->data[1] = threshold; + st->data[2] = threshold; + result = regmap_bulk_write(st->map, INV_ICM20609_REG_ACCEL_WOM_X_THR, + st->data, 3); + break; + default: + result = regmap_write(st->map, INV_MPU6500_REG_WOM_THRESHOLD, threshold); + break; + } + if (result) + return result; + + st->chip_config.roc_threshold = value; + + return 0; +} + +static int inv_mpu6050_set_lp_odr(struct inv_mpu6050_state *st, unsigned int freq_div, + unsigned int *lp_div) +{ + static const unsigned int freq_dividers[] = {2, 4, 8, 16, 32, 64, 128, 256}; + static const unsigned int reg_values[] = { + INV_MPU6050_LPOSC_500HZ, INV_MPU6050_LPOSC_250HZ, + INV_MPU6050_LPOSC_125HZ, INV_MPU6050_LPOSC_62HZ, + INV_MPU6050_LPOSC_31HZ, INV_MPU6050_LPOSC_16HZ, + INV_MPU6050_LPOSC_8HZ, INV_MPU6050_LPOSC_4HZ, + }; + unsigned int val, i; + + switch (st->chip_type) { + case INV_ICM20609: + case INV_ICM20689: + case INV_ICM20600: + case INV_ICM20602: + case INV_ICM20690: + /* nothing to do */ + *lp_div = INV_MPU6050_FREQ_DIVIDER(st); + return 0; + default: + break; + } + + /* found the nearest superior frequency divider */ + i = ARRAY_SIZE(reg_values) - 1; + val = reg_values[i]; + *lp_div = freq_dividers[i]; + for (i = 0; i < ARRAY_SIZE(freq_dividers); ++i) { + if (freq_div <= freq_dividers[i]) { + val = reg_values[i]; + *lp_div = freq_dividers[i]; + break; + } + } + + dev_dbg(regmap_get_device(st->map), "lp_odr: 0x%x\n", val); + return regmap_write(st->map, INV_MPU6500_REG_LP_ODR, val); +} + +static int inv_mpu6050_set_wom_lp(struct inv_mpu6050_state *st, bool on) +{ + unsigned int lp_div; + int result; + + if (on) { + /* set low power ODR */ + result = inv_mpu6050_set_lp_odr(st, INV_MPU6050_FREQ_DIVIDER(st), &lp_div); + if (result) + return result; + /* disable accel low pass filter */ + result = inv_mpu6050_set_accel_lpf_regs(st, INV_MPU6050_FILTER_NOLPF); + if (result) + return result; + /* update wom threshold with new low-power frequency divider */ + result = inv_mpu6050_set_wom_threshold(st, st->chip_config.roc_threshold, lp_div); + if (result) + return result; + /* set cycle mode */ + result = inv_mpu6050_pwr_mgmt_1_write(st, false, true, -1, -1); + } else { + /* disable cycle mode */ + result = inv_mpu6050_pwr_mgmt_1_write(st, false, false, -1, -1); + if (result) + return result; + /* restore wom threshold */ + result = inv_mpu6050_set_wom_threshold(st, st->chip_config.roc_threshold, + INV_MPU6050_FREQ_DIVIDER(st)); + if (result) + return result; + /* restore accel low pass filter */ + result = inv_mpu6050_set_accel_lpf_regs(st, st->chip_config.lpf); + } + + return result; +} + +static int inv_mpu6050_enable_wom(struct inv_mpu6050_state *st, bool en) +{ + struct device *pdev = regmap_get_device(st->map); + unsigned int mask; + int result; + + if (en) { + result = pm_runtime_resume_and_get(pdev); + if (result) + return result; + + mask = INV_MPU6050_SENSOR_ACCL | INV_MPU6050_SENSOR_WOM; + result = inv_mpu6050_switch_engine(st, true, mask); + if (result) + goto error_suspend; + + result = inv_mpu6050_set_wom_int(st, true); + if (result) + goto error_suspend; + } else { + result = inv_mpu6050_set_wom_int(st, false); + if (result) + dev_err(pdev, "error %d disabling WoM interrupt bit", result); + + /* disable only WoM and let accel be disabled by autosuspend */ + result = inv_mpu6050_switch_engine(st, false, INV_MPU6050_SENSOR_WOM); + if (result) { + dev_err(pdev, "error %d disabling WoM force off", result); + /* force WoM off */ + st->chip_config.wom_en = false; + } + + pm_runtime_mark_last_busy(pdev); + pm_runtime_put_autosuspend(pdev); + } + + return result; + +error_suspend: + pm_runtime_mark_last_busy(pdev); + pm_runtime_put_autosuspend(pdev); + return result; +} + +static int inv_mpu6050_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + /* support only WoM (accel roc rising) event */ + if (chan->type != IIO_ACCEL || type != IIO_EV_TYPE_ROC || + dir != IIO_EV_DIR_RISING) + return -EINVAL; + + guard(mutex)(&st->lock); + + return st->chip_config.wom_en ? 1 : 0; +} + +static int inv_mpu6050_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int state) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + int enable; + + /* support only WoM (accel roc rising) event */ + if (chan->type != IIO_ACCEL || type != IIO_EV_TYPE_ROC || + dir != IIO_EV_DIR_RISING) + return -EINVAL; + + enable = !!state; + + guard(mutex)(&st->lock); + + if (st->chip_config.wom_en == enable) + return 0; + + return inv_mpu6050_enable_wom(st, enable); +} + +static int inv_mpu6050_read_event_value(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + u32 rem; + + /* support only WoM (accel roc rising) event value */ + if (chan->type != IIO_ACCEL || type != IIO_EV_TYPE_ROC || + dir != IIO_EV_DIR_RISING || info != IIO_EV_INFO_VALUE) + return -EINVAL; + + guard(mutex)(&st->lock); + + /* return value in micro */ + *val = div_u64_rem(st->chip_config.roc_threshold, 1000000U, &rem); + *val2 = rem; + + return IIO_VAL_INT_PLUS_MICRO; +} + +static int inv_mpu6050_write_event_value(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + struct inv_mpu6050_state *st = iio_priv(indio_dev); + struct device *pdev = regmap_get_device(st->map); + u64 value; + int result; + + /* support only WoM (accel roc rising) event value */ + if (chan->type != IIO_ACCEL || type != IIO_EV_TYPE_ROC || + dir != IIO_EV_DIR_RISING || info != IIO_EV_INFO_VALUE) + return -EINVAL; + + if (val < 0 || val2 < 0) + return -EINVAL; + + guard(mutex)(&st->lock); + + result = pm_runtime_resume_and_get(pdev); + if (result) + return result; + + value = (u64)val * 1000000ULL + (u64)val2; + result = inv_mpu6050_set_wom_threshold(st, value, INV_MPU6050_FREQ_DIVIDER(st)); + + pm_runtime_mark_last_busy(pdev); + pm_runtime_put_autosuspend(pdev); + + return result; +} + /* * inv_mpu6050_set_lpf() - set low pass filer based on fifo rate. * @@ -989,6 +1328,12 @@ inv_mpu6050_fifo_rate_store(struct device *dev, struct device_attribute *attr, if (result) goto fifo_rate_fail_power_off; + /* update wom threshold since roc is dependent on sampling frequency */ + result = inv_mpu6050_set_wom_threshold(st, st->chip_config.roc_threshold, + INV_MPU6050_FREQ_DIVIDER(st)); + if (result) + goto fifo_rate_fail_power_off; + pm_runtime_mark_last_busy(pdev); fifo_rate_fail_power_off: pm_runtime_put_autosuspend(pdev); @@ -1089,6 +1434,15 @@ static const struct iio_chan_spec_ext_info inv_ext_info[] = { { } }; +static const struct iio_event_spec inv_wom_events[] = { + { + .type = IIO_EV_TYPE_ROC, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_ENABLE) | + BIT(IIO_EV_INFO_VALUE), + }, +}; + #define INV_MPU6050_CHAN(_type, _channel2, _index) \ { \ .type = _type, \ @@ -1124,7 +1478,31 @@ static const struct iio_chan_spec_ext_info inv_ext_info[] = { }, \ } -static const struct iio_chan_spec inv_mpu_channels[] = { +#define INV_MPU6050_EVENT_CHAN(_type, _channel2, _events, _events_nb) \ +{ \ + .type = _type, \ + .modified = 1, \ + .channel2 = _channel2, \ + .event_spec = _events, \ + .num_event_specs = _events_nb, \ + .scan_index = -1, \ +} + +static const struct iio_chan_spec inv_mpu6050_channels[] = { + IIO_CHAN_SOFT_TIMESTAMP(INV_MPU6050_SCAN_TIMESTAMP), + + INV_MPU6050_TEMP_CHAN(INV_MPU6050_SCAN_TEMP), + + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_X, INV_MPU6050_SCAN_GYRO_X), + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Y, INV_MPU6050_SCAN_GYRO_Y), + INV_MPU6050_CHAN(IIO_ANGL_VEL, IIO_MOD_Z, INV_MPU6050_SCAN_GYRO_Z), + + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_X, INV_MPU6050_SCAN_ACCL_X), + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Y, INV_MPU6050_SCAN_ACCL_Y), + INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Z, INV_MPU6050_SCAN_ACCL_Z), +}; + +static const struct iio_chan_spec inv_mpu6500_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(INV_MPU6050_SCAN_TIMESTAMP), INV_MPU6050_TEMP_CHAN(INV_MPU6050_SCAN_TEMP), @@ -1136,6 +1514,9 @@ static const struct iio_chan_spec inv_mpu_channels[] = { INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_X, INV_MPU6050_SCAN_ACCL_X), INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Y, INV_MPU6050_SCAN_ACCL_Y), INV_MPU6050_CHAN(IIO_ACCEL, IIO_MOD_Z, INV_MPU6050_SCAN_ACCL_Z), + + INV_MPU6050_EVENT_CHAN(IIO_ACCEL, IIO_MOD_X_OR_Y_OR_Z, + inv_wom_events, ARRAY_SIZE(inv_wom_events)), }; #define INV_MPU6050_SCAN_MASK_3AXIS_ACCEL \ @@ -1326,6 +1707,10 @@ static const struct iio_info mpu_info = { .write_raw = &inv_mpu6050_write_raw, .write_raw_get_fmt = &inv_write_raw_get_fmt, .attrs = &inv_attribute_group, + .read_event_config = inv_mpu6050_read_event_config, + .write_event_config = inv_mpu6050_write_event_config, + .read_event_value = inv_mpu6050_read_event_value, + .write_event_value = inv_mpu6050_write_event_value, .validate_trigger = inv_mpu6050_validate_trigger, .debugfs_reg_access = &inv_mpu6050_reg_access, }; @@ -1537,6 +1922,7 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, irq_type); return -EINVAL; } + device_set_wakeup_capable(dev, true); st->vdd_supply = devm_regulator_get(dev, "vdd"); if (IS_ERR(st->vdd_supply)) @@ -1613,6 +1999,12 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, return result; switch (chip_type) { + case INV_MPU6000: + case INV_MPU6050: + indio_dev->channels = inv_mpu6050_channels; + indio_dev->num_channels = ARRAY_SIZE(inv_mpu6050_channels); + indio_dev->available_scan_masks = inv_mpu_scan_masks; + break; case INV_MPU9150: indio_dev->channels = inv_mpu9150_channels; indio_dev->num_channels = ARRAY_SIZE(inv_mpu9150_channels); @@ -1626,13 +2018,13 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, break; case INV_ICM20600: case INV_ICM20602: - indio_dev->channels = inv_mpu_channels; - indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels); + indio_dev->channels = inv_mpu6500_channels; + indio_dev->num_channels = ARRAY_SIZE(inv_mpu6500_channels); indio_dev->available_scan_masks = inv_icm20602_scan_masks; break; default: - indio_dev->channels = inv_mpu_channels; - indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels); + indio_dev->channels = inv_mpu6500_channels; + indio_dev->num_channels = ARRAY_SIZE(inv_mpu6500_channels); indio_dev->available_scan_masks = inv_mpu_scan_masks; break; } @@ -1641,9 +2033,18 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, * auxiliary device in use. Otherwise Going back to 6-axis only. */ if (st->magn_disabled) { - indio_dev->channels = inv_mpu_channels; - indio_dev->num_channels = ARRAY_SIZE(inv_mpu_channels); - indio_dev->available_scan_masks = inv_mpu_scan_masks; + switch (chip_type) { + case INV_MPU9150: + indio_dev->channels = inv_mpu6050_channels; + indio_dev->num_channels = ARRAY_SIZE(inv_mpu6050_channels); + indio_dev->available_scan_masks = inv_mpu_scan_masks; + break; + default: + indio_dev->channels = inv_mpu6500_channels; + indio_dev->num_channels = ARRAY_SIZE(inv_mpu6500_channels); + indio_dev->available_scan_masks = inv_mpu_scan_masks; + break; + } } indio_dev->info = &mpu_info; @@ -1687,16 +2088,27 @@ static int inv_mpu_resume(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct inv_mpu6050_state *st = iio_priv(indio_dev); + bool wakeup; int result; - mutex_lock(&st->lock); - result = inv_mpu_core_enable_regulator_vddio(st); - if (result) - goto out_unlock; + guard(mutex)(&st->lock); - result = inv_mpu6050_set_power_itg(st, true); - if (result) - goto out_unlock; + wakeup = device_may_wakeup(dev) && st->chip_config.wom_en; + + if (wakeup) { + enable_irq(st->irq); + disable_irq_wake(st->irq); + result = inv_mpu6050_set_wom_lp(st, false); + if (result) + return result; + } else { + result = inv_mpu_core_enable_regulator_vddio(st); + if (result) + return result; + result = inv_mpu6050_set_power_itg(st, true); + if (result) + return result; + } pm_runtime_disable(dev); pm_runtime_set_active(dev); @@ -1704,14 +2116,17 @@ static int inv_mpu_resume(struct device *dev) result = inv_mpu6050_switch_engine(st, true, st->suspended_sensors); if (result) - goto out_unlock; + return result; + + if (st->chip_config.wom_en && !wakeup) { + result = inv_mpu6050_set_wom_int(st, true); + if (result) + return result; + } if (iio_buffer_enabled(indio_dev)) result = inv_mpu6050_prepare_fifo(st, true); -out_unlock: - mutex_unlock(&st->lock); - return result; } @@ -1719,23 +2134,30 @@ static int inv_mpu_suspend(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); struct inv_mpu6050_state *st = iio_priv(indio_dev); + bool wakeup; int result; - mutex_lock(&st->lock); + guard(mutex)(&st->lock); st->suspended_sensors = 0; - if (pm_runtime_suspended(dev)) { - result = 0; - goto out_unlock; - } + if (pm_runtime_suspended(dev)) + return 0; if (iio_buffer_enabled(indio_dev)) { result = inv_mpu6050_prepare_fifo(st, false); if (result) - goto out_unlock; + return result; + } + + wakeup = device_may_wakeup(dev) && st->chip_config.wom_en; + + if (st->chip_config.wom_en && !wakeup) { + result = inv_mpu6050_set_wom_int(st, false); + if (result) + return result; } - if (st->chip_config.accl_en) + if (st->chip_config.accl_en && !wakeup) st->suspended_sensors |= INV_MPU6050_SENSOR_ACCL; if (st->chip_config.gyro_en) st->suspended_sensors |= INV_MPU6050_SENSOR_GYRO; @@ -1743,19 +2165,26 @@ static int inv_mpu_suspend(struct device *dev) st->suspended_sensors |= INV_MPU6050_SENSOR_TEMP; if (st->chip_config.magn_en) st->suspended_sensors |= INV_MPU6050_SENSOR_MAGN; + if (st->chip_config.wom_en && !wakeup) + st->suspended_sensors |= INV_MPU6050_SENSOR_WOM; result = inv_mpu6050_switch_engine(st, false, st->suspended_sensors); if (result) - goto out_unlock; - - result = inv_mpu6050_set_power_itg(st, false); - if (result) - goto out_unlock; + return result; - inv_mpu_core_disable_regulator_vddio(st); -out_unlock: - mutex_unlock(&st->lock); + if (wakeup) { + result = inv_mpu6050_set_wom_lp(st, true); + if (result) + return result; + enable_irq_wake(st->irq); + disable_irq(st->irq); + } else { + result = inv_mpu6050_set_power_itg(st, false); + if (result) + return result; + inv_mpu_core_disable_regulator_vddio(st); + } - return result; + return 0; } static int inv_mpu_runtime_suspend(struct device *dev) @@ -1767,7 +2196,8 @@ static int inv_mpu_runtime_suspend(struct device *dev) mutex_lock(&st->lock); sensors = INV_MPU6050_SENSOR_ACCL | INV_MPU6050_SENSOR_GYRO | - INV_MPU6050_SENSOR_TEMP | INV_MPU6050_SENSOR_MAGN; + INV_MPU6050_SENSOR_TEMP | INV_MPU6050_SENSOR_MAGN | + INV_MPU6050_SENSOR_WOM; ret = inv_mpu6050_switch_engine(st, false, sensors); if (ret) goto out_unlock; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index 5950e2419ebb50..e1c0c51468761a 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -88,11 +88,12 @@ enum inv_devices { INV_NUM_PARTS }; -/* chip sensors mask: accelerometer, gyroscope, temperature, magnetometer */ +/* chip sensors mask: accelerometer, gyroscope, temperature, magnetometer, WoM */ #define INV_MPU6050_SENSOR_ACCL BIT(0) #define INV_MPU6050_SENSOR_GYRO BIT(1) #define INV_MPU6050_SENSOR_TEMP BIT(2) #define INV_MPU6050_SENSOR_MAGN BIT(3) +#define INV_MPU6050_SENSOR_WOM BIT(4) /** * struct inv_mpu6050_chip_config - Cached chip configuration data. @@ -104,11 +105,13 @@ enum inv_devices { * @gyro_en: gyro engine enabled * @temp_en: temperature sensor enabled * @magn_en: magn engine (i2c master) enabled + * @wom_en: Wake-on-Motion enabled * @accl_fifo_enable: enable accel data output * @gyro_fifo_enable: enable gyro data output * @temp_fifo_enable: enable temp data output * @magn_fifo_enable: enable magn data output * @divider: chip sample rate divider (sample rate divider - 1) + * @roc_threshold: save ROC threshold (WoM) set value */ struct inv_mpu6050_chip_config { unsigned int clk:3; @@ -119,12 +122,14 @@ struct inv_mpu6050_chip_config { unsigned int gyro_en:1; unsigned int temp_en:1; unsigned int magn_en:1; + unsigned int wom_en:1; unsigned int accl_fifo_enable:1; unsigned int gyro_fifo_enable:1; unsigned int temp_fifo_enable:1; unsigned int magn_fifo_enable:1; u8 divider; u8 user_ctrl; + u64 roc_threshold; }; /* @@ -180,6 +185,7 @@ struct inv_mpu6050_hw { * @magn_orient: magnetometer sensor chip orientation if available. * @suspended_sensors: sensors mask of sensors turned off for suspend * @data: read buffer used for bulk reads. + * @it_timestamp: interrupt timestamp. */ struct inv_mpu6050_state { struct mutex lock; @@ -205,6 +211,7 @@ struct inv_mpu6050_state { unsigned int suspended_sensors; bool level_shifter; u8 *data; + s64 it_timestamp; }; /*register and associated bit definition*/ @@ -256,12 +263,16 @@ struct inv_mpu6050_state { #define INV_MPU6050_REG_INT_ENABLE 0x38 #define INV_MPU6050_BIT_DATA_RDY_EN 0x01 #define INV_MPU6050_BIT_DMP_INT_EN 0x02 +#define INV_MPU6500_BIT_WOM_INT_EN BIT(6) +#define INV_ICM20608_BIT_WOM_INT_EN GENMASK(7, 5) #define INV_MPU6050_REG_RAW_ACCEL 0x3B #define INV_MPU6050_REG_TEMPERATURE 0x41 #define INV_MPU6050_REG_RAW_GYRO 0x43 #define INV_MPU6050_REG_INT_STATUS 0x3A +#define INV_MPU6500_BIT_WOM_INT BIT(6) +#define INV_ICM20608_BIT_WOM_INT GENMASK(7, 5) #define INV_MPU6050_BIT_FIFO_OVERFLOW_INT 0x10 #define INV_MPU6050_BIT_RAW_DATA_RDY_INT 0x01 @@ -294,6 +305,7 @@ struct inv_mpu6050_state { #define INV_MPU6050_REG_PWR_MGMT_1 0x6B #define INV_MPU6050_BIT_H_RESET 0x80 #define INV_MPU6050_BIT_SLEEP 0x40 +#define INV_MPU6050_BIT_CYCLE 0x20 #define INV_MPU6050_BIT_TEMP_DIS 0x08 #define INV_MPU6050_BIT_CLK_MASK 0x7 @@ -301,6 +313,11 @@ struct inv_mpu6050_state { #define INV_MPU6050_BIT_PWR_ACCL_STBY 0x38 #define INV_MPU6050_BIT_PWR_GYRO_STBY 0x07 +/* ICM20609 registers */ +#define INV_ICM20609_REG_ACCEL_WOM_X_THR 0x20 +#define INV_ICM20609_REG_ACCEL_WOM_Y_THR 0x21 +#define INV_ICM20609_REG_ACCEL_WOM_Z_THR 0x22 + /* ICM20602 register */ #define INV_ICM20602_REG_I2C_IF 0x70 #define INV_ICM20602_BIT_I2C_IF_DIS 0x40 @@ -320,6 +337,11 @@ struct inv_mpu6050_state { /* mpu6500 registers */ #define INV_MPU6500_REG_ACCEL_CONFIG_2 0x1D #define INV_ICM20689_BITS_FIFO_SIZE_MAX 0xC0 +#define INV_MPU6500_REG_LP_ODR 0x1E +#define INV_MPU6500_REG_WOM_THRESHOLD 0x1F +#define INV_MPU6500_REG_ACCEL_INTEL_CTRL 0x69 +#define INV_MPU6500_BIT_ACCEL_INTEL_EN BIT(7) +#define INV_MPU6500_BIT_ACCEL_INTEL_MODE BIT(6) #define INV_MPU6500_REG_ACCEL_OFFSET 0x77 /* delay time in milliseconds */ @@ -432,6 +454,18 @@ enum inv_mpu6050_filter_e { NUM_MPU6050_FILTER }; +enum inv_mpu6050_lposc_e { + INV_MPU6050_LPOSC_4HZ = 4, + INV_MPU6050_LPOSC_8HZ, + INV_MPU6050_LPOSC_16HZ, + INV_MPU6050_LPOSC_31HZ, + INV_MPU6050_LPOSC_62HZ, + INV_MPU6050_LPOSC_125HZ, + INV_MPU6050_LPOSC_250HZ, + INV_MPU6050_LPOSC_500HZ, + NUM_MPU6050_LPOSC, +}; + /* IIO attribute address */ enum INV_MPU6050_IIO_ATTR_ADDR { ATTR_GYRO_MATRIX, diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index d404e59eb5e855..0dc0f22a558279 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -33,10 +33,8 @@ static int inv_reset_fifo(struct iio_dev *indio_dev) reset_fifo_fail: dev_err(regmap_get_device(st->map), "reset fifo failed %d\n", result); - result = regmap_write(st->map, st->reg->int_enable, - INV_MPU6050_BIT_DATA_RDY_EN); - - return result; + return regmap_update_bits(st->map, st->reg->int_enable, + INV_MPU6050_BIT_DATA_RDY_EN, INV_MPU6050_BIT_DATA_RDY_EN); } /* @@ -53,21 +51,10 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) u32 fifo_period; s64 timestamp; u8 data[INV_MPU6050_OUTPUT_DATA_SIZE]; - int int_status; size_t i, nb; mutex_lock(&st->lock); - /* ack interrupt and check status */ - result = regmap_read(st->map, st->reg->int_status, &int_status); - if (result) { - dev_err(regmap_get_device(st->map), - "failed to ack interrupt\n"); - goto flush_fifo; - } - if (!(int_status & INV_MPU6050_BIT_RAW_DATA_RDY_INT)) - goto end_session; - if (!(st->chip_config.accl_fifo_enable | st->chip_config.gyro_fifo_enable | st->chip_config.magn_fifo_enable)) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c index e6e6e94452a328..1b603567ccc804 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c @@ -6,6 +6,7 @@ #include <linux/pm_runtime.h> #include <linux/iio/common/inv_sensors_timestamp.h> +#include <linux/iio/events.h> #include "inv_mpu_iio.h" @@ -135,11 +136,13 @@ int inv_mpu6050_prepare_fifo(struct inv_mpu6050_state *st, bool enable) ret = regmap_write(st->map, st->reg->user_ctrl, d); if (ret) return ret; - /* enable interrupt */ - ret = regmap_write(st->map, st->reg->int_enable, - INV_MPU6050_BIT_DATA_RDY_EN); + /* enable data interrupt */ + ret = regmap_update_bits(st->map, st->reg->int_enable, + INV_MPU6050_BIT_DATA_RDY_EN, INV_MPU6050_BIT_DATA_RDY_EN); } else { - ret = regmap_write(st->map, st->reg->int_enable, 0); + /* disable data interrupt */ + ret = regmap_update_bits(st->map, st->reg->int_enable, + INV_MPU6050_BIT_DATA_RDY_EN, 0); if (ret) return ret; ret = regmap_write(st->map, st->reg->fifo_en, 0); @@ -172,9 +175,9 @@ static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable) return result; /* * In case autosuspend didn't trigger, turn off first not - * required sensors. + * required sensors excepted WoM */ - result = inv_mpu6050_switch_engine(st, false, ~scan); + result = inv_mpu6050_switch_engine(st, false, ~scan & ~INV_MPU6050_SENSOR_WOM); if (result) goto error_power_off; result = inv_mpu6050_switch_engine(st, true, scan); @@ -226,6 +229,65 @@ static const struct iio_trigger_ops inv_mpu_trigger_ops = { .set_trigger_state = &inv_mpu_data_rdy_trigger_set_state, }; +static irqreturn_t inv_mpu6050_interrupt_timestamp(int irq, void *p) +{ + struct iio_dev *indio_dev = p; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + + st->it_timestamp = iio_get_time_ns(indio_dev); + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t inv_mpu6050_interrupt_handle(int irq, void *p) +{ + struct iio_dev *indio_dev = p; + struct inv_mpu6050_state *st = iio_priv(indio_dev); + unsigned int int_status, wom_bits; + u64 ev_code; + int result; + + switch (st->chip_type) { + case INV_MPU6050: + case INV_MPU6500: + case INV_MPU6515: + case INV_MPU6880: + case INV_MPU6000: + case INV_MPU9150: + case INV_MPU9250: + case INV_MPU9255: + wom_bits = INV_MPU6500_BIT_WOM_INT; + break; + default: + wom_bits = INV_ICM20608_BIT_WOM_INT; + break; + } + + scoped_guard(mutex, &st->lock) { + /* ack interrupt and check status */ + result = regmap_read(st->map, st->reg->int_status, &int_status); + if (result) { + dev_err(regmap_get_device(st->map), "failed to ack interrupt\n"); + return IRQ_HANDLED; + } + + /* handle WoM event */ + if (st->chip_config.wom_en && (int_status & wom_bits)) { + ev_code = IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z, + IIO_EV_TYPE_ROC, IIO_EV_DIR_RISING); + iio_push_event(indio_dev, ev_code, st->it_timestamp); + } + } + + /* handle raw data interrupt */ + if (int_status & INV_MPU6050_BIT_RAW_DATA_RDY_INT) { + indio_dev->pollfunc->timestamp = st->it_timestamp; + iio_trigger_poll_nested(st->trig); + } + + return IRQ_HANDLED; +} + int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type) { int ret; @@ -238,11 +300,10 @@ int inv_mpu6050_probe_trigger(struct iio_dev *indio_dev, int irq_type) if (!st->trig) return -ENOMEM; - ret = devm_request_irq(&indio_dev->dev, st->irq, - &iio_trigger_generic_data_rdy_poll, - irq_type, - "inv_mpu", - st->trig); + ret = devm_request_threaded_irq(&indio_dev->dev, st->irq, + &inv_mpu6050_interrupt_timestamp, + &inv_mpu6050_interrupt_handle, + irq_type, "inv_mpu", indio_dev); if (ret) return ret; diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index 0716986f981299..937ff9c5a74c76 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -2726,7 +2726,7 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, if (!hw) return -ENOMEM; - dev_set_drvdata(dev, (void *)hw); + dev_set_drvdata(dev, hw); mutex_init(&hw->fifo_lock); mutex_init(&hw->conf_lock); diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c index 2fea2bbbe47fd0..f08ed6d70ae590 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -43,10 +43,12 @@ #include <linux/types.h> #include <linux/iio/backend.h> +#include <linux/iio/iio.h> struct iio_backend { struct list_head entry; const struct iio_backend_ops *ops; + struct device *frontend_dev; struct device *dev; struct module *owner; void *priv; @@ -186,6 +188,44 @@ int iio_backend_data_format_set(struct iio_backend *back, unsigned int chan, } EXPORT_SYMBOL_NS_GPL(iio_backend_data_format_set, IIO_BACKEND); +/** + * iio_backend_data_source_set - Select data source + * @back: Backend device + * @chan: Channel number + * @data: Data source + * + * A given backend may have different sources to stream/sync data. This allows + * to choose that source. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_data_source_set(struct iio_backend *back, unsigned int chan, + enum iio_backend_data_source data) +{ + if (data >= IIO_BACKEND_DATA_SOURCE_MAX) + return -EINVAL; + + return iio_backend_op_call(back, data_source_set, chan, data); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_data_source_set, IIO_BACKEND); + +/** + * iio_backend_set_sampling_freq - Set channel sampling rate + * @back: Backend device + * @chan: Channel number + * @sample_rate_hz: Sample rate + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_set_sampling_freq(struct iio_backend *back, unsigned int chan, + u64 sample_rate_hz) +{ + return iio_backend_op_call(back, set_sample_rate, chan, sample_rate_hz); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_set_sampling_freq, IIO_BACKEND); + static void iio_backend_free_buffer(void *arg) { struct iio_backend_buffer_pair *pair = arg; @@ -231,6 +271,143 @@ int devm_iio_backend_request_buffer(struct device *dev, } EXPORT_SYMBOL_NS_GPL(devm_iio_backend_request_buffer, IIO_BACKEND); +static struct iio_backend *iio_backend_from_indio_dev_parent(const struct device *dev) +{ + struct iio_backend *back = ERR_PTR(-ENODEV), *iter; + + /* + * We deliberately go through all backends even after finding a match. + * The reason is that we want to catch frontend devices which have more + * than one backend in which case returning the first we find is bogus. + * For those cases, frontends need to explicitly define + * get_iio_backend() in struct iio_info. + */ + guard(mutex)(&iio_back_lock); + list_for_each_entry(iter, &iio_back_list, entry) { + if (dev == iter->frontend_dev) { + if (!IS_ERR(back)) { + dev_warn(dev, + "Multiple backends! get_iio_backend() needs to be implemented"); + return ERR_PTR(-ENODEV); + } + + back = iter; + } + } + + return back; +} + +/** + * iio_backend_ext_info_get - IIO ext_info read callback + * @indio_dev: IIO device + * @private: Data private to the driver + * @chan: IIO channel + * @buf: Buffer where to place the attribute data + * + * This helper is intended to be used by backends that extend an IIO channel + * (through iio_backend_extend_chan_spec()) with extended info. In that case, + * backends are not supposed to give their own callbacks (as they would not have + * a way to get the backend from indio_dev). This is the getter. + * + * RETURNS: + * Number of bytes written to buf, negative error number on failure. + */ +ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private, + const struct iio_chan_spec *chan, char *buf) +{ + struct iio_backend *back; + + /* + * The below should work for the majority of the cases. It will not work + * when one frontend has multiple backends in which case we'll need a + * new callback in struct iio_info so we can directly request the proper + * backend from the frontend. Anyways, let's only introduce new options + * when really needed... + */ + back = iio_backend_from_indio_dev_parent(indio_dev->dev.parent); + if (IS_ERR(back)) + return PTR_ERR(back); + + return iio_backend_op_call(back, ext_info_get, private, chan, buf); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_ext_info_get, IIO_BACKEND); + +/** + * iio_backend_ext_info_set - IIO ext_info write callback + * @indio_dev: IIO device + * @private: Data private to the driver + * @chan: IIO channel + * @buf: Buffer holding the sysfs attribute + * @len: Buffer length + * + * This helper is intended to be used by backends that extend an IIO channel + * (trough iio_backend_extend_chan_spec()) with extended info. In that case, + * backends are not supposed to give their own callbacks (as they would not have + * a way to get the backend from indio_dev). This is the setter. + * + * RETURNS: + * Buffer length on success, negative error number on failure. + */ +ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len) +{ + struct iio_backend *back; + + back = iio_backend_from_indio_dev_parent(indio_dev->dev.parent); + if (IS_ERR(back)) + return PTR_ERR(back); + + return iio_backend_op_call(back, ext_info_set, private, chan, buf, len); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_ext_info_set, IIO_BACKEND); + +/** + * iio_backend_extend_chan_spec - Extend an IIO channel + * @indio_dev: IIO device + * @back: Backend device + * @chan: IIO channel + * + * Some backends may have their own functionalities and hence capable of + * extending a frontend's channel. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_extend_chan_spec(struct iio_dev *indio_dev, + struct iio_backend *back, + struct iio_chan_spec *chan) +{ + const struct iio_chan_spec_ext_info *frontend_ext_info = chan->ext_info; + const struct iio_chan_spec_ext_info *back_ext_info; + int ret; + + ret = iio_backend_op_call(back, extend_chan_spec, chan); + if (ret) + return ret; + /* + * Let's keep things simple for now. Don't allow to overwrite the + * frontend's extended info. If ever needed, we can support appending + * it. + */ + if (frontend_ext_info && chan->ext_info != frontend_ext_info) + return -EOPNOTSUPP; + if (!chan->ext_info) + return 0; + + /* Don't allow backends to get creative and force their own handlers */ + for (back_ext_info = chan->ext_info; back_ext_info->name; back_ext_info++) { + if (back_ext_info->read != iio_backend_ext_info_get) + return -EINVAL; + if (back_ext_info->write != iio_backend_ext_info_set) + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_NS_GPL(iio_backend_extend_chan_spec, IIO_BACKEND); + static void iio_backend_release(void *arg) { struct iio_backend *back = arg; @@ -263,6 +440,8 @@ static int __devm_iio_backend_get(struct device *dev, struct iio_backend *back) "Could not link to supplier(%s)\n", dev_name(back->dev)); + back->frontend_dev = dev; + dev_dbg(dev, "Found backend(%s) device\n", dev_name(back->dev)); return 0; diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index b581a7e8056621..1d950a3e153b8a 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -10,6 +10,7 @@ * - Alternative access techniques? */ #include <linux/anon_inodes.h> +#include <linux/cleanup.h> #include <linux/kernel.h> #include <linux/export.h> #include <linux/device.h> @@ -533,28 +534,26 @@ static ssize_t iio_scan_el_store(struct device *dev, ret = kstrtobool(buf, &state); if (ret < 0) return ret; - mutex_lock(&iio_dev_opaque->mlock); - if (iio_buffer_is_active(buffer)) { - ret = -EBUSY; - goto error_ret; - } + + guard(mutex)(&iio_dev_opaque->mlock); + if (iio_buffer_is_active(buffer)) + return -EBUSY; + ret = iio_scan_mask_query(indio_dev, buffer, this_attr->address); if (ret < 0) - goto error_ret; - if (!state && ret) { - ret = iio_scan_mask_clear(buffer, this_attr->address); - if (ret) - goto error_ret; - } else if (state && !ret) { - ret = iio_scan_mask_set(indio_dev, buffer, this_attr->address); - if (ret) - goto error_ret; - } + return ret; -error_ret: - mutex_unlock(&iio_dev_opaque->mlock); + if (state && ret) + return len; - return ret < 0 ? ret : len; + if (state) + ret = iio_scan_mask_set(indio_dev, buffer, this_attr->address); + else + ret = iio_scan_mask_clear(buffer, this_attr->address); + if (ret) + return ret; + + return len; } static ssize_t iio_scan_el_ts_show(struct device *dev, @@ -581,16 +580,13 @@ static ssize_t iio_scan_el_ts_store(struct device *dev, if (ret < 0) return ret; - mutex_lock(&iio_dev_opaque->mlock); - if (iio_buffer_is_active(buffer)) { - ret = -EBUSY; - goto error_ret; - } + guard(mutex)(&iio_dev_opaque->mlock); + if (iio_buffer_is_active(buffer)) + return -EBUSY; + buffer->scan_timestamp = state; -error_ret: - mutex_unlock(&iio_dev_opaque->mlock); - return ret ? ret : len; + return len; } static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev, @@ -674,21 +670,16 @@ static ssize_t length_store(struct device *dev, struct device_attribute *attr, if (val == buffer->length) return len; - mutex_lock(&iio_dev_opaque->mlock); - if (iio_buffer_is_active(buffer)) { - ret = -EBUSY; - } else { - buffer->access->set_length(buffer, val); - ret = 0; - } - if (ret) - goto out; + guard(mutex)(&iio_dev_opaque->mlock); + if (iio_buffer_is_active(buffer)) + return -EBUSY; + + buffer->access->set_length(buffer, val); + if (buffer->length && buffer->length < buffer->watermark) buffer->watermark = buffer->length; -out: - mutex_unlock(&iio_dev_opaque->mlock); - return ret ? ret : len; + return len; } static ssize_t enable_show(struct device *dev, struct device_attribute *attr, @@ -1268,7 +1259,6 @@ int iio_update_buffers(struct iio_dev *indio_dev, struct iio_buffer *remove_buffer) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); - int ret; if (insert_buffer == remove_buffer) return 0; @@ -1277,8 +1267,8 @@ int iio_update_buffers(struct iio_dev *indio_dev, insert_buffer->direction == IIO_BUFFER_DIRECTION_OUT) return -EINVAL; - mutex_lock(&iio_dev_opaque->info_exist_lock); - mutex_lock(&iio_dev_opaque->mlock); + guard(mutex)(&iio_dev_opaque->info_exist_lock); + guard(mutex)(&iio_dev_opaque->mlock); if (insert_buffer && iio_buffer_is_active(insert_buffer)) insert_buffer = NULL; @@ -1286,23 +1276,13 @@ int iio_update_buffers(struct iio_dev *indio_dev, if (remove_buffer && !iio_buffer_is_active(remove_buffer)) remove_buffer = NULL; - if (!insert_buffer && !remove_buffer) { - ret = 0; - goto out_unlock; - } - - if (!indio_dev->info) { - ret = -ENODEV; - goto out_unlock; - } - - ret = __iio_update_buffers(indio_dev, insert_buffer, remove_buffer); + if (!insert_buffer && !remove_buffer) + return 0; -out_unlock: - mutex_unlock(&iio_dev_opaque->mlock); - mutex_unlock(&iio_dev_opaque->info_exist_lock); + if (!indio_dev->info) + return -ENODEV; - return ret; + return __iio_update_buffers(indio_dev, insert_buffer, remove_buffer); } EXPORT_SYMBOL_GPL(iio_update_buffers); @@ -1326,22 +1306,22 @@ static ssize_t enable_store(struct device *dev, struct device_attribute *attr, if (ret < 0) return ret; - mutex_lock(&iio_dev_opaque->mlock); + guard(mutex)(&iio_dev_opaque->mlock); /* Find out if it is in the list */ inlist = iio_buffer_is_active(buffer); /* Already in desired state */ if (inlist == requested_state) - goto done; + return len; if (requested_state) ret = __iio_update_buffers(indio_dev, buffer, NULL); else ret = __iio_update_buffers(indio_dev, NULL, buffer); + if (ret) + return ret; -done: - mutex_unlock(&iio_dev_opaque->mlock); - return (ret < 0) ? ret : len; + return len; } static ssize_t watermark_show(struct device *dev, struct device_attribute *attr, @@ -1368,23 +1348,17 @@ static ssize_t watermark_store(struct device *dev, if (!val) return -EINVAL; - mutex_lock(&iio_dev_opaque->mlock); + guard(mutex)(&iio_dev_opaque->mlock); - if (val > buffer->length) { - ret = -EINVAL; - goto out; - } + if (val > buffer->length) + return -EINVAL; - if (iio_buffer_is_active(buffer)) { - ret = -EBUSY; - goto out; - } + if (iio_buffer_is_active(buffer)) + return -EBUSY; buffer->watermark = val; -out: - mutex_unlock(&iio_dev_opaque->mlock); - return ret ? ret : len; + return len; } static ssize_t data_available_show(struct device *dev, diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 4302093b92c75a..fa7cc051b4c49b 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -11,6 +11,7 @@ #include <linux/anon_inodes.h> #include <linux/cdev.h> +#include <linux/cleanup.h> #include <linux/debugfs.h> #include <linux/device.h> #include <linux/err.h> @@ -1643,19 +1644,20 @@ struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv) struct iio_dev *indio_dev; size_t alloc_size; - alloc_size = sizeof(struct iio_dev_opaque); - if (sizeof_priv) { - alloc_size = ALIGN(alloc_size, IIO_DMA_MINALIGN); - alloc_size += sizeof_priv; - } + if (sizeof_priv) + alloc_size = ALIGN(sizeof(*iio_dev_opaque), IIO_DMA_MINALIGN) + sizeof_priv; + else + alloc_size = sizeof(*iio_dev_opaque); iio_dev_opaque = kzalloc(alloc_size, GFP_KERNEL); if (!iio_dev_opaque) return NULL; indio_dev = &iio_dev_opaque->indio_dev; - indio_dev->priv = (char *)iio_dev_opaque + - ALIGN(sizeof(struct iio_dev_opaque), IIO_DMA_MINALIGN); + + if (sizeof_priv) + indio_dev->priv = (char *)iio_dev_opaque + + ALIGN(sizeof(*iio_dev_opaque), IIO_DMA_MINALIGN); indio_dev->dev.parent = parent; indio_dev->dev.type = &iio_device_type; @@ -1809,31 +1811,24 @@ static long iio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) struct iio_dev *indio_dev = ib->indio_dev; struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); struct iio_ioctl_handler *h; - int ret = -ENODEV; - - mutex_lock(&iio_dev_opaque->info_exist_lock); + int ret; + guard(mutex)(&iio_dev_opaque->info_exist_lock); /* * The NULL check here is required to prevent crashing when a device * is being removed while userspace would still have open file handles * to try to access this device. */ if (!indio_dev->info) - goto out_unlock; + return -ENODEV; list_for_each_entry(h, &iio_dev_opaque->ioctl_handlers, entry) { ret = h->ioctl(indio_dev, filp, cmd, arg); if (ret != IIO_IOCTL_UNHANDLED) - break; + return ret; } - if (ret == IIO_IOCTL_UNHANDLED) - ret = -ENODEV; - -out_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); - - return ret; + return -ENODEV; } static const struct file_operations iio_buffer_fileops = { @@ -2061,18 +2056,16 @@ void iio_device_unregister(struct iio_dev *indio_dev) cdev_device_del(&iio_dev_opaque->chrdev, &indio_dev->dev); - mutex_lock(&iio_dev_opaque->info_exist_lock); + scoped_guard(mutex, &iio_dev_opaque->info_exist_lock) { + iio_device_unregister_debugfs(indio_dev); - iio_device_unregister_debugfs(indio_dev); + iio_disable_all_buffers(indio_dev); - iio_disable_all_buffers(indio_dev); + indio_dev->info = NULL; - indio_dev->info = NULL; - - iio_device_wakeup_eventset(indio_dev); - iio_buffer_wakeup_poll(indio_dev); - - mutex_unlock(&iio_dev_opaque->info_exist_lock); + iio_device_wakeup_eventset(indio_dev); + iio_buffer_wakeup_poll(indio_dev); + } iio_buffers_free_sysfs_and_mask(indio_dev); } diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index 18f83158f637f1..16de57846bd9c1 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -4,6 +4,7 @@ * Copyright (c) 2008 Jonathan Cameron */ +#include <linux/cleanup.h> #include <linux/kernel.h> #include <linux/idr.h> #include <linux/err.h> @@ -80,19 +81,18 @@ int iio_trigger_register(struct iio_trigger *trig_info) goto error_unregister_id; /* Add to list of available triggers held by the IIO core */ - mutex_lock(&iio_trigger_list_lock); - if (__iio_trigger_find_by_name(trig_info->name)) { - pr_err("Duplicate trigger name '%s'\n", trig_info->name); - ret = -EEXIST; - goto error_device_del; + scoped_guard(mutex, &iio_trigger_list_lock) { + if (__iio_trigger_find_by_name(trig_info->name)) { + pr_err("Duplicate trigger name '%s'\n", trig_info->name); + ret = -EEXIST; + goto error_device_del; + } + list_add_tail(&trig_info->list, &iio_trigger_list); } - list_add_tail(&trig_info->list, &iio_trigger_list); - mutex_unlock(&iio_trigger_list_lock); return 0; error_device_del: - mutex_unlock(&iio_trigger_list_lock); device_del(&trig_info->dev); error_unregister_id: ida_free(&iio_trigger_ida, trig_info->id); @@ -102,9 +102,8 @@ EXPORT_SYMBOL(iio_trigger_register); void iio_trigger_unregister(struct iio_trigger *trig_info) { - mutex_lock(&iio_trigger_list_lock); - list_del(&trig_info->list); - mutex_unlock(&iio_trigger_list_lock); + scoped_guard(mutex, &iio_trigger_list_lock) + list_del(&trig_info->list); ida_free(&iio_trigger_ida, trig_info->id); /* Possible issue in here */ @@ -120,12 +119,11 @@ int iio_trigger_set_immutable(struct iio_dev *indio_dev, struct iio_trigger *tri return -EINVAL; iio_dev_opaque = to_iio_dev_opaque(indio_dev); - mutex_lock(&iio_dev_opaque->mlock); + guard(mutex)(&iio_dev_opaque->mlock); WARN_ON(iio_dev_opaque->trig_readonly); indio_dev->trig = iio_trigger_get(trig); iio_dev_opaque->trig_readonly = true; - mutex_unlock(&iio_dev_opaque->mlock); return 0; } @@ -145,18 +143,14 @@ static struct iio_trigger *__iio_trigger_find_by_name(const char *name) static struct iio_trigger *iio_trigger_acquire_by_name(const char *name) { - struct iio_trigger *trig = NULL, *iter; + struct iio_trigger *iter; - mutex_lock(&iio_trigger_list_lock); + guard(mutex)(&iio_trigger_list_lock); list_for_each_entry(iter, &iio_trigger_list, list) - if (sysfs_streq(iter->name, name)) { - trig = iter; - iio_trigger_get(trig); - break; - } - mutex_unlock(&iio_trigger_list_lock); + if (sysfs_streq(iter->name, name)) + return iio_trigger_get(iter); - return trig; + return NULL; } static void iio_reenable_work_fn(struct work_struct *work) @@ -259,22 +253,21 @@ static int iio_trigger_get_irq(struct iio_trigger *trig) { int ret; - mutex_lock(&trig->pool_lock); - ret = bitmap_find_free_region(trig->pool, - CONFIG_IIO_CONSUMERS_PER_TRIGGER, - ilog2(1)); - mutex_unlock(&trig->pool_lock); - if (ret >= 0) - ret += trig->subirq_base; + scoped_guard(mutex, &trig->pool_lock) { + ret = bitmap_find_free_region(trig->pool, + CONFIG_IIO_CONSUMERS_PER_TRIGGER, + ilog2(1)); + if (ret < 0) + return ret; + } - return ret; + return ret + trig->subirq_base; } static void iio_trigger_put_irq(struct iio_trigger *trig, int irq) { - mutex_lock(&trig->pool_lock); + guard(mutex)(&trig->pool_lock); clear_bit(irq - trig->subirq_base, trig->pool); - mutex_unlock(&trig->pool_lock); } /* Complexity in here. With certain triggers (datardy) an acknowledgement @@ -451,16 +444,12 @@ static ssize_t current_trigger_store(struct device *dev, struct iio_trigger *trig; int ret; - mutex_lock(&iio_dev_opaque->mlock); - if (iio_dev_opaque->currentmode == INDIO_BUFFER_TRIGGERED) { - mutex_unlock(&iio_dev_opaque->mlock); - return -EBUSY; - } - if (iio_dev_opaque->trig_readonly) { - mutex_unlock(&iio_dev_opaque->mlock); - return -EPERM; + scoped_guard(mutex, &iio_dev_opaque->mlock) { + if (iio_dev_opaque->currentmode == INDIO_BUFFER_TRIGGERED) + return -EBUSY; + if (iio_dev_opaque->trig_readonly) + return -EPERM; } - mutex_unlock(&iio_dev_opaque->mlock); trig = iio_trigger_acquire_by_name(buf); if (oldtrig == trig) { diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 7a1f6713318a36..52d7732618282e 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -3,6 +3,7 @@ * * Copyright (c) 2011 Jonathan Cameron */ +#include <linux/cleanup.h> #include <linux/err.h> #include <linux/export.h> #include <linux/minmax.h> @@ -43,13 +44,14 @@ static int iio_map_array_unregister_locked(struct iio_dev *indio_dev) int iio_map_array_register(struct iio_dev *indio_dev, struct iio_map *maps) { - int i = 0, ret = 0; struct iio_map_internal *mapi; + int i = 0; + int ret; if (!maps) return 0; - mutex_lock(&iio_map_list_lock); + guard(mutex)(&iio_map_list_lock); while (maps[i].consumer_dev_name) { mapi = kzalloc(sizeof(*mapi), GFP_KERNEL); if (!mapi) { @@ -61,11 +63,10 @@ int iio_map_array_register(struct iio_dev *indio_dev, struct iio_map *maps) list_add_tail(&mapi->l, &iio_map_list); i++; } -error_ret: - if (ret) - iio_map_array_unregister_locked(indio_dev); - mutex_unlock(&iio_map_list_lock); + return 0; +error_ret: + iio_map_array_unregister_locked(indio_dev); return ret; } EXPORT_SYMBOL_GPL(iio_map_array_register); @@ -75,13 +76,8 @@ EXPORT_SYMBOL_GPL(iio_map_array_register); */ int iio_map_array_unregister(struct iio_dev *indio_dev) { - int ret; - - mutex_lock(&iio_map_list_lock); - ret = iio_map_array_unregister_locked(indio_dev); - mutex_unlock(&iio_map_list_lock); - - return ret; + guard(mutex)(&iio_map_list_lock); + return iio_map_array_unregister_locked(indio_dev); } EXPORT_SYMBOL_GPL(iio_map_array_unregister); @@ -183,25 +179,21 @@ err_put: static struct iio_channel *fwnode_iio_channel_get(struct fwnode_handle *fwnode, int index) { - struct iio_channel *channel; int err; if (index < 0) return ERR_PTR(-EINVAL); - channel = kzalloc(sizeof(*channel), GFP_KERNEL); + struct iio_channel *channel __free(kfree) = + kzalloc(sizeof(*channel), GFP_KERNEL); if (!channel) return ERR_PTR(-ENOMEM); err = __fwnode_iio_channel_get(channel, fwnode, index); if (err) - goto err_free_channel; + return ERR_PTR(err); - return channel; - -err_free_channel: - kfree(channel); - return ERR_PTR(err); + return_ptr(channel); } static struct iio_channel * @@ -291,7 +283,6 @@ EXPORT_SYMBOL_GPL(fwnode_iio_channel_get_by_name); static struct iio_channel *fwnode_iio_channel_get_all(struct device *dev) { struct fwnode_handle *fwnode = dev_fwnode(dev); - struct iio_channel *chans; int i, mapind, nummaps = 0; int ret; @@ -307,7 +298,8 @@ static struct iio_channel *fwnode_iio_channel_get_all(struct device *dev) return ERR_PTR(-ENODEV); /* NULL terminated array to save passing size */ - chans = kcalloc(nummaps + 1, sizeof(*chans), GFP_KERNEL); + struct iio_channel *chans __free(kfree) = + kcalloc(nummaps + 1, sizeof(*chans), GFP_KERNEL); if (!chans) return ERR_PTR(-ENOMEM); @@ -317,12 +309,11 @@ static struct iio_channel *fwnode_iio_channel_get_all(struct device *dev) if (ret) goto error_free_chans; } - return chans; + return_ptr(chans); error_free_chans: for (i = 0; i < mapind; i++) iio_device_put(chans[i].indio_dev); - kfree(chans); return ERR_PTR(ret); } @@ -330,28 +321,28 @@ static struct iio_channel *iio_channel_get_sys(const char *name, const char *channel_name) { struct iio_map_internal *c_i = NULL, *c = NULL; - struct iio_channel *channel; int err; if (!(name || channel_name)) return ERR_PTR(-ENODEV); /* first find matching entry the channel map */ - mutex_lock(&iio_map_list_lock); - list_for_each_entry(c_i, &iio_map_list, l) { - if ((name && strcmp(name, c_i->map->consumer_dev_name) != 0) || - (channel_name && - strcmp(channel_name, c_i->map->consumer_channel) != 0)) - continue; - c = c_i; - iio_device_get(c->indio_dev); - break; + scoped_guard(mutex, &iio_map_list_lock) { + list_for_each_entry(c_i, &iio_map_list, l) { + if ((name && strcmp(name, c_i->map->consumer_dev_name) != 0) || + (channel_name && + strcmp(channel_name, c_i->map->consumer_channel) != 0)) + continue; + c = c_i; + iio_device_get(c->indio_dev); + break; + } } - mutex_unlock(&iio_map_list_lock); if (!c) return ERR_PTR(-ENODEV); - channel = kzalloc(sizeof(*channel), GFP_KERNEL); + struct iio_channel *channel __free(kfree) = + kzalloc(sizeof(*channel), GFP_KERNEL); if (!channel) { err = -ENOMEM; goto error_no_mem; @@ -366,14 +357,12 @@ static struct iio_channel *iio_channel_get_sys(const char *name, if (!channel->channel) { err = -EINVAL; - goto error_no_chan; + goto error_no_mem; } } - return channel; + return_ptr(channel); -error_no_chan: - kfree(channel); error_no_mem: iio_device_put(c->indio_dev); return ERR_PTR(err); @@ -450,8 +439,8 @@ EXPORT_SYMBOL_GPL(devm_fwnode_iio_channel_get_by_name); struct iio_channel *iio_channel_get_all(struct device *dev) { const char *name; - struct iio_channel *chans; struct iio_map_internal *c = NULL; + struct iio_channel *fw_chans; int nummaps = 0; int mapind = 0; int i, ret; @@ -459,17 +448,17 @@ struct iio_channel *iio_channel_get_all(struct device *dev) if (!dev) return ERR_PTR(-EINVAL); - chans = fwnode_iio_channel_get_all(dev); + fw_chans = fwnode_iio_channel_get_all(dev); /* * We only want to carry on if the error is -ENODEV. Anything else * should be reported up the stack. */ - if (!IS_ERR(chans) || PTR_ERR(chans) != -ENODEV) - return chans; + if (!IS_ERR(fw_chans) || PTR_ERR(fw_chans) != -ENODEV) + return fw_chans; name = dev_name(dev); - mutex_lock(&iio_map_list_lock); + guard(mutex)(&iio_map_list_lock); /* first count the matching maps */ list_for_each_entry(c, &iio_map_list, l) if (name && strcmp(name, c->map->consumer_dev_name) != 0) @@ -477,17 +466,14 @@ struct iio_channel *iio_channel_get_all(struct device *dev) else nummaps++; - if (nummaps == 0) { - ret = -ENODEV; - goto error_ret; - } + if (nummaps == 0) + return ERR_PTR(-ENODEV); /* NULL terminated array to save passing size */ - chans = kcalloc(nummaps + 1, sizeof(*chans), GFP_KERNEL); - if (!chans) { - ret = -ENOMEM; - goto error_ret; - } + struct iio_channel *chans __free(kfree) = + kcalloc(nummaps + 1, sizeof(*chans), GFP_KERNEL); + if (!chans) + return ERR_PTR(-ENOMEM); /* for each map fill in the chans element */ list_for_each_entry(c, &iio_map_list, l) { @@ -509,17 +495,12 @@ struct iio_channel *iio_channel_get_all(struct device *dev) ret = -ENODEV; goto error_free_chans; } - mutex_unlock(&iio_map_list_lock); - return chans; + return_ptr(chans); error_free_chans: for (i = 0; i < nummaps; i++) iio_device_put(chans[i].indio_dev); - kfree(chans); -error_ret: - mutex_unlock(&iio_map_list_lock); - return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(iio_channel_get_all); @@ -590,38 +571,24 @@ static int iio_channel_read(struct iio_channel *chan, int *val, int *val2, int iio_read_channel_raw(struct iio_channel *chan, int *val) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret; - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } - - ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW); -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; - return ret; + return iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW); } EXPORT_SYMBOL_GPL(iio_read_channel_raw); int iio_read_channel_average_raw(struct iio_channel *chan, int *val) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret; - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } - - ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_AVERAGE_RAW); -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; - return ret; + return iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_AVERAGE_RAW); } EXPORT_SYMBOL_GPL(iio_read_channel_average_raw); @@ -708,20 +675,13 @@ int iio_convert_raw_to_processed(struct iio_channel *chan, int raw, int *processed, unsigned int scale) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret; - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } - - ret = iio_convert_raw_to_processed_unlocked(chan, raw, processed, - scale); -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; - return ret; + return iio_convert_raw_to_processed_unlocked(chan, raw, processed, + scale); } EXPORT_SYMBOL_GPL(iio_convert_raw_to_processed); @@ -729,19 +689,12 @@ int iio_read_channel_attribute(struct iio_channel *chan, int *val, int *val2, enum iio_chan_info_enum attribute) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret; - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } - - ret = iio_channel_read(chan, val, val2, attribute); -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; - return ret; + return iio_channel_read(chan, val, val2, attribute); } EXPORT_SYMBOL_GPL(iio_read_channel_attribute); @@ -757,30 +710,26 @@ int iio_read_channel_processed_scale(struct iio_channel *chan, int *val, struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); int ret; - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; if (iio_channel_has_info(chan->channel, IIO_CHAN_INFO_PROCESSED)) { ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_PROCESSED); if (ret < 0) - goto err_unlock; + return ret; *val *= scale; + + return 0; } else { ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW); if (ret < 0) - goto err_unlock; - ret = iio_convert_raw_to_processed_unlocked(chan, *val, val, - scale); - } + return ret; -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); - - return ret; + return iio_convert_raw_to_processed_unlocked(chan, *val, val, + scale); + } } EXPORT_SYMBOL_GPL(iio_read_channel_processed_scale); @@ -813,19 +762,12 @@ int iio_read_avail_channel_attribute(struct iio_channel *chan, enum iio_chan_info_enum attribute) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret; - - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } - ret = iio_channel_read_avail(chan, vals, type, length, attribute); -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; - return ret; + return iio_channel_read_avail(chan, vals, type, length, attribute); } EXPORT_SYMBOL_GPL(iio_read_avail_channel_attribute); @@ -892,20 +834,13 @@ static int iio_channel_read_max(struct iio_channel *chan, int iio_read_max_channel_raw(struct iio_channel *chan, int *val) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret; int type; - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } - - ret = iio_channel_read_max(chan, val, NULL, &type, IIO_CHAN_INFO_RAW); -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; - return ret; + return iio_channel_read_max(chan, val, NULL, &type, IIO_CHAN_INFO_RAW); } EXPORT_SYMBOL_GPL(iio_read_max_channel_raw); @@ -955,40 +890,27 @@ static int iio_channel_read_min(struct iio_channel *chan, int iio_read_min_channel_raw(struct iio_channel *chan, int *val) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret; int type; - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } - - ret = iio_channel_read_min(chan, val, NULL, &type, IIO_CHAN_INFO_RAW); -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; - return ret; + return iio_channel_read_min(chan, val, NULL, &type, IIO_CHAN_INFO_RAW); } EXPORT_SYMBOL_GPL(iio_read_min_channel_raw); int iio_get_channel_type(struct iio_channel *chan, enum iio_chan_type *type) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret = 0; - /* Need to verify underlying driver has not gone away */ - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; *type = chan->channel->type; -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); - return ret; + return 0; } EXPORT_SYMBOL_GPL(iio_get_channel_type); @@ -1003,19 +925,12 @@ int iio_write_channel_attribute(struct iio_channel *chan, int val, int val2, enum iio_chan_info_enum attribute) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(chan->indio_dev); - int ret; - mutex_lock(&iio_dev_opaque->info_exist_lock); - if (!chan->indio_dev->info) { - ret = -ENODEV; - goto err_unlock; - } + guard(mutex)(&iio_dev_opaque->info_exist_lock); + if (!chan->indio_dev->info) + return -ENODEV; - ret = iio_channel_write(chan, val, val2, attribute); -err_unlock: - mutex_unlock(&iio_dev_opaque->info_exist_lock); - - return ret; + return iio_channel_write(chan, val, val2, attribute); } EXPORT_SYMBOL_GPL(iio_write_channel_attribute); diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index fd5a9879a582cf..9a587d4031180f 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -73,6 +73,18 @@ config APDS9300 To compile this driver as a module, choose M here: the module will be called apds9300. +config APDS9306 + tristate "Avago APDS9306 Ambient Light Sensor" + depends on I2C + select REGMAP_I2C + select IIO_GTS_HELPER + help + If you say Y or M here, you get support for Avago APDS9306 + Ambient Light Sensor. + + If built as a dynamically linked module, it will be called + apds9306. + config APDS9960 tristate "Avago APDS9960 gesture/RGB/ALS/proximity sensor" select REGMAP_I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 2e5fdb33e0e979..a30f906e91ba09 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_ADUX1020) += adux1020.o obj-$(CONFIG_AL3010) += al3010.o obj-$(CONFIG_AL3320A) += al3320a.o obj-$(CONFIG_APDS9300) += apds9300.o +obj-$(CONFIG_APDS9306) += apds9306.o obj-$(CONFIG_APDS9960) += apds9960.o obj-$(CONFIG_AS73211) += as73211.o obj-$(CONFIG_BH1750) += bh1750.o diff --git a/drivers/iio/light/apds9306.c b/drivers/iio/light/apds9306.c new file mode 100644 index 00000000000000..46c647ccd44c51 --- /dev/null +++ b/drivers/iio/light/apds9306.c @@ -0,0 +1,1361 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * APDS-9306/APDS-9306-065 Ambient Light Sensor + * I2C Address: 0x52 + * Datasheet: https://docs.broadcom.com/doc/AV02-4755EN + * + * Copyright (C) 2024 Subhajit Ghosh <subhajit.ghosh@tweaklogic.com> + */ + +#include <linux/bits.h> +#include <linux/cleanup.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/minmax.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/types.h> +#include <linux/units.h> + +#include <linux/iio/iio.h> +#include <linux/iio/iio-gts-helper.h> +#include <linux/iio/events.h> +#include <linux/iio/sysfs.h> + +#include <asm/unaligned.h> + +#define APDS9306_MAIN_CTRL_REG 0x00 +#define APDS9306_ALS_MEAS_RATE_REG 0x04 +#define APDS9306_ALS_GAIN_REG 0x05 +#define APDS9306_PART_ID_REG 0x06 +#define APDS9306_MAIN_STATUS_REG 0x07 +#define APDS9306_CLEAR_DATA_0_REG 0x0A +#define APDS9306_CLEAR_DATA_1_REG 0x0B +#define APDS9306_CLEAR_DATA_2_REG 0x0C +#define APDS9306_ALS_DATA_0_REG 0x0D +#define APDS9306_ALS_DATA_1_REG 0x0E +#define APDS9306_ALS_DATA_2_REG 0x0F +#define APDS9306_INT_CFG_REG 0x19 +#define APDS9306_INT_PERSISTENCE_REG 0x1A +#define APDS9306_ALS_THRES_UP_0_REG 0x21 +#define APDS9306_ALS_THRES_UP_1_REG 0x22 +#define APDS9306_ALS_THRES_UP_2_REG 0x23 +#define APDS9306_ALS_THRES_LOW_0_REG 0x24 +#define APDS9306_ALS_THRES_LOW_1_REG 0x25 +#define APDS9306_ALS_THRES_LOW_2_REG 0x26 +#define APDS9306_ALS_THRES_VAR_REG 0x27 + +#define APDS9306_ALS_INT_STAT_MASK BIT(4) +#define APDS9306_ALS_DATA_STAT_MASK BIT(3) + +#define APDS9306_ALS_THRES_VAL_MAX (BIT(20) - 1) +#define APDS9306_ALS_THRES_VAR_VAL_MAX (BIT(3) - 1) +#define APDS9306_ALS_PERSIST_VAL_MAX (BIT(4) - 1) +#define APDS9306_ALS_READ_DATA_DELAY_US (20 * USEC_PER_MSEC) +#define APDS9306_NUM_REPEAT_RATES 7 +#define APDS9306_INT_SRC_CLEAR 0 +#define APDS9306_INT_SRC_ALS 1 +#define APDS9306_SAMP_FREQ_10HZ 0 + +/** + * struct part_id_gts_multiplier - Part no. and corresponding gts multiplier + * + * GTS (Gain Time Scale) are helper functions for Light sensors which along + * with hardware gains also has gains associated with Integration times. + * + * There are two variants of the device with slightly different characteristics, + * they have same ADC count for different Lux levels as mentioned in the + * datasheet. This multiplier array is used to store the derived Lux per count + * value for the two variants to be used by the GTS helper functions. + * + * @part_id: Part ID of the device + * @max_scale_int: Multiplier for iio_init_iio_gts() + * @max_scale_nano: Multiplier for iio_init_iio_gts() + */ +struct part_id_gts_multiplier { + int part_id; + int max_scale_int; + int max_scale_nano; +}; + +/* + * As per the datasheet, at HW Gain = 3x, Integration time 100mS (32x), + * typical 2000 ADC counts are observed for 49.8 uW per sq cm (340.134 lux) + * for apds9306 and 43 uW per sq cm (293.69 lux) for apds9306-065. + * Assuming lux per count is linear across all integration time ranges. + * + * Lux = (raw + offset) * scale; offset can be any value by userspace. + * HG = Hardware Gain; ITG = Gain by changing integration time. + * Scale table by IIO GTS Helpers = (1 / HG) * (1 / ITG) * Multiplier. + * + * The Lux values provided in the datasheet are at ITG=32x and HG=3x, + * at typical 2000 count for both variants of the device. + * + * Lux per ADC count at 3x and 32x for apds9306 = 340.134 / 2000 + * Lux per ADC count at 3x and 32x for apds9306-065 = 293.69 / 2000 + * + * The Multiplier for the scale table provided to userspace: + * IIO GTS scale Multiplier for apds9306 = (340.134 / 2000) * 32 * 3 = 16.326432 + * and for apds9306-065 = (293.69 / 2000) * 32 * 3 = 14.09712 + */ +static const struct part_id_gts_multiplier apds9306_gts_mul[] = { + { + .part_id = 0xB1, + .max_scale_int = 16, + .max_scale_nano = 3264320, + }, { + .part_id = 0xB3, + .max_scale_int = 14, + .max_scale_nano = 9712000, + }, +}; + +static const int apds9306_repeat_rate_freq[APDS9306_NUM_REPEAT_RATES][2] = { + { 40, 0 }, + { 20, 0 }, + { 10, 0 }, + { 5, 0 }, + { 2, 0 }, + { 1, 0 }, + { 0, 500000 }, +}; + +static const int apds9306_repeat_rate_period[APDS9306_NUM_REPEAT_RATES] = { + 25000, 50000, 100000, 200000, 500000, 1000000, 2000000, +}; + +/** + * struct apds9306_regfields - apds9306 regmap fields definitions + * + * @sw_reset: Software reset regfield + * @en: Enable regfield + * @intg_time: Resolution regfield + * @repeat_rate: Measurement Rate regfield + * @gain: Hardware gain regfield + * @int_src: Interrupt channel regfield + * @int_thresh_var_en: Interrupt variance threshold regfield + * @int_en: Interrupt enable regfield + * @int_persist_val: Interrupt persistence regfield + * @int_thresh_var_val: Interrupt threshold variance value regfield + */ +struct apds9306_regfields { + struct regmap_field *sw_reset; + struct regmap_field *en; + struct regmap_field *intg_time; + struct regmap_field *repeat_rate; + struct regmap_field *gain; + struct regmap_field *int_src; + struct regmap_field *int_thresh_var_en; + struct regmap_field *int_en; + struct regmap_field *int_persist_val; + struct regmap_field *int_thresh_var_val; +}; + +/** + * struct apds9306_data - apds9306 private data and registers definitions + * + * @dev: Pointer to the device structure + * @gts: IIO Gain Time Scale structure + * @mutex: Lock for protecting adc reads, device settings changes where + * some calculations are required before or after setting or + * getting the raw settings values from regmap writes or reads + * respectively. + * @regmap: Regmap structure pointer + * @rf: Regmap register fields structure + * @nlux_per_count: Nano lux per ADC count for a particular model + * @read_data_available: Flag set by IRQ handler for ADC data available + */ +struct apds9306_data { + struct device *dev; + struct iio_gts gts; + + struct mutex mutex; + + struct regmap *regmap; + struct apds9306_regfields rf; + + int nlux_per_count; + int read_data_available; +}; + +/* + * Available scales with gain 1x - 18x, timings 3.125, 25, 50, 100, 200, 400 ms + * Time impacts to gain: 1x, 8x, 16x, 32x, 64x, 128x + */ +#define APDS9306_GSEL_1X 0x00 +#define APDS9306_GSEL_3X 0x01 +#define APDS9306_GSEL_6X 0x02 +#define APDS9306_GSEL_9X 0x03 +#define APDS9306_GSEL_18X 0x04 + +static const struct iio_gain_sel_pair apds9306_gains[] = { + GAIN_SCALE_GAIN(1, APDS9306_GSEL_1X), + GAIN_SCALE_GAIN(3, APDS9306_GSEL_3X), + GAIN_SCALE_GAIN(6, APDS9306_GSEL_6X), + GAIN_SCALE_GAIN(9, APDS9306_GSEL_9X), + GAIN_SCALE_GAIN(18, APDS9306_GSEL_18X), +}; + +#define APDS9306_MEAS_MODE_400MS 0x00 +#define APDS9306_MEAS_MODE_200MS 0x01 +#define APDS9306_MEAS_MODE_100MS 0x02 +#define APDS9306_MEAS_MODE_50MS 0x03 +#define APDS9306_MEAS_MODE_25MS 0x04 +#define APDS9306_MEAS_MODE_3125US 0x05 + +static const struct iio_itime_sel_mul apds9306_itimes[] = { + GAIN_SCALE_ITIME_US(400000, APDS9306_MEAS_MODE_400MS, BIT(7)), + GAIN_SCALE_ITIME_US(200000, APDS9306_MEAS_MODE_200MS, BIT(6)), + GAIN_SCALE_ITIME_US(100000, APDS9306_MEAS_MODE_100MS, BIT(5)), + GAIN_SCALE_ITIME_US(50000, APDS9306_MEAS_MODE_50MS, BIT(4)), + GAIN_SCALE_ITIME_US(25000, APDS9306_MEAS_MODE_25MS, BIT(3)), + GAIN_SCALE_ITIME_US(3125, APDS9306_MEAS_MODE_3125US, BIT(0)), +}; + +static const struct iio_event_spec apds9306_event_spec[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_shared_by_all = BIT(IIO_EV_INFO_VALUE), + }, { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_shared_by_all = BIT(IIO_EV_INFO_VALUE), + }, { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_EITHER, + .mask_shared_by_all = BIT(IIO_EV_INFO_PERIOD), + .mask_separate = BIT(IIO_EV_INFO_ENABLE), + }, { + .type = IIO_EV_TYPE_THRESH_ADAPTIVE, + .mask_shared_by_all = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, +}; + +static const struct iio_chan_spec apds9306_channels_with_events[] = { + { + .type = IIO_LIGHT, + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_separate_available = BIT(IIO_CHAN_INFO_SCALE), + .event_spec = apds9306_event_spec, + .num_event_specs = ARRAY_SIZE(apds9306_event_spec), + }, { + .type = IIO_INTENSITY, + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + .channel2 = IIO_MOD_LIGHT_CLEAR, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .modified = 1, + .event_spec = apds9306_event_spec, + .num_event_specs = ARRAY_SIZE(apds9306_event_spec), + }, +}; + +static const struct iio_chan_spec apds9306_channels_without_events[] = { + { + .type = IIO_LIGHT, + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_separate_available = BIT(IIO_CHAN_INFO_SCALE), + }, { + .type = IIO_INTENSITY, + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + .modified = 1, + .channel2 = IIO_MOD_LIGHT_CLEAR, + }, +}; + +/* INT_PERSISTENCE available */ +static IIO_CONST_ATTR(thresh_either_period_available, "[0 1 15]"); + +/* ALS_THRESH_VAR available */ +static IIO_CONST_ATTR(thresh_adaptive_either_values_available, "[0 1 7]"); + +static struct attribute *apds9306_event_attributes[] = { + &iio_const_attr_thresh_either_period_available.dev_attr.attr, + &iio_const_attr_thresh_adaptive_either_values_available.dev_attr.attr, + NULL +}; + +static const struct attribute_group apds9306_event_attr_group = { + .attrs = apds9306_event_attributes, +}; + +static const struct regmap_range apds9306_readable_ranges[] = { + regmap_reg_range(APDS9306_MAIN_CTRL_REG, APDS9306_ALS_THRES_VAR_REG) +}; + +static const struct regmap_range apds9306_writable_ranges[] = { + regmap_reg_range(APDS9306_MAIN_CTRL_REG, APDS9306_ALS_GAIN_REG), + regmap_reg_range(APDS9306_INT_CFG_REG, APDS9306_ALS_THRES_VAR_REG) +}; + +static const struct regmap_range apds9306_volatile_ranges[] = { + regmap_reg_range(APDS9306_MAIN_STATUS_REG, APDS9306_MAIN_STATUS_REG), + regmap_reg_range(APDS9306_CLEAR_DATA_0_REG, APDS9306_ALS_DATA_2_REG) +}; + +static const struct regmap_range apds9306_precious_ranges[] = { + regmap_reg_range(APDS9306_MAIN_STATUS_REG, APDS9306_MAIN_STATUS_REG) +}; + +static const struct regmap_access_table apds9306_readable_table = { + .yes_ranges = apds9306_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(apds9306_readable_ranges) +}; + +static const struct regmap_access_table apds9306_writable_table = { + .yes_ranges = apds9306_writable_ranges, + .n_yes_ranges = ARRAY_SIZE(apds9306_writable_ranges) +}; + +static const struct regmap_access_table apds9306_volatile_table = { + .yes_ranges = apds9306_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(apds9306_volatile_ranges) +}; + +static const struct regmap_access_table apds9306_precious_table = { + .yes_ranges = apds9306_precious_ranges, + .n_yes_ranges = ARRAY_SIZE(apds9306_precious_ranges) +}; + +static const struct regmap_config apds9306_regmap = { + .name = "apds9306_regmap", + .reg_bits = 8, + .val_bits = 8, + .rd_table = &apds9306_readable_table, + .wr_table = &apds9306_writable_table, + .volatile_table = &apds9306_volatile_table, + .precious_table = &apds9306_precious_table, + .max_register = APDS9306_ALS_THRES_VAR_REG, + .cache_type = REGCACHE_RBTREE, +}; + +static const struct reg_field apds9306_rf_sw_reset = + REG_FIELD(APDS9306_MAIN_CTRL_REG, 4, 4); + +static const struct reg_field apds9306_rf_en = + REG_FIELD(APDS9306_MAIN_CTRL_REG, 1, 1); + +static const struct reg_field apds9306_rf_intg_time = + REG_FIELD(APDS9306_ALS_MEAS_RATE_REG, 4, 6); + +static const struct reg_field apds9306_rf_repeat_rate = + REG_FIELD(APDS9306_ALS_MEAS_RATE_REG, 0, 2); + +static const struct reg_field apds9306_rf_gain = + REG_FIELD(APDS9306_ALS_GAIN_REG, 0, 2); + +static const struct reg_field apds9306_rf_int_src = + REG_FIELD(APDS9306_INT_CFG_REG, 4, 5); + +static const struct reg_field apds9306_rf_int_thresh_var_en = + REG_FIELD(APDS9306_INT_CFG_REG, 3, 3); + +static const struct reg_field apds9306_rf_int_en = + REG_FIELD(APDS9306_INT_CFG_REG, 2, 2); + +static const struct reg_field apds9306_rf_int_persist_val = + REG_FIELD(APDS9306_INT_PERSISTENCE_REG, 4, 7); + +static const struct reg_field apds9306_rf_int_thresh_var_val = + REG_FIELD(APDS9306_ALS_THRES_VAR_REG, 0, 2); + +static int apds9306_regfield_init(struct apds9306_data *data) +{ + struct device *dev = data->dev; + struct regmap *regmap = data->regmap; + struct regmap_field *tmp; + struct apds9306_regfields *rf = &data->rf; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_sw_reset); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->sw_reset = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_en); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->en = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_intg_time); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->intg_time = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_repeat_rate); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->repeat_rate = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_gain); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->gain = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_int_src); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->int_src = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_int_thresh_var_en); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->int_thresh_var_en = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_int_en); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->int_en = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_int_persist_val); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->int_persist_val = tmp; + + tmp = devm_regmap_field_alloc(dev, regmap, apds9306_rf_int_thresh_var_val); + if (IS_ERR(tmp)) + return PTR_ERR(tmp); + rf->int_thresh_var_val = tmp; + + return 0; +} + +static int apds9306_power_state(struct apds9306_data *data, bool state) +{ + struct apds9306_regfields *rf = &data->rf; + int ret; + + /* Reset not included as it causes ugly I2C bus error */ + if (state) { + ret = regmap_field_write(rf->en, 1); + if (ret) + return ret; + /* 5ms wake up time */ + fsleep(5000); + return 0; + } + + return regmap_field_write(rf->en, 0); +} + +static int apds9306_read_data(struct apds9306_data *data, int *val, int reg) +{ + struct device *dev = data->dev; + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct apds9306_regfields *rf = &data->rf; + u64 ev_code; + int ret, delay, intg_time, intg_time_idx, repeat_rate_idx, int_src; + int status = 0; + u8 buff[3]; + + ret = pm_runtime_resume_and_get(data->dev); + if (ret) + return ret; + + ret = regmap_field_read(rf->intg_time, &intg_time_idx); + if (ret) + return ret; + + ret = regmap_field_read(rf->repeat_rate, &repeat_rate_idx); + if (ret) + return ret; + + ret = regmap_field_read(rf->int_src, &int_src); + if (ret) + return ret; + + intg_time = iio_gts_find_int_time_by_sel(&data->gts, intg_time_idx); + if (intg_time < 0) + return intg_time; + + /* Whichever is greater - integration time period or sampling period. */ + delay = max(intg_time, apds9306_repeat_rate_period[repeat_rate_idx]); + + /* + * Clear stale data flag that might have been set by the interrupt + * handler if it got data available flag set in the status reg. + */ + data->read_data_available = 0; + + /* + * If this function runs parallel with the interrupt handler, either + * this reads and clears the status registers or the interrupt handler + * does. The interrupt handler sets a flag for read data available + * in our private structure which we read here. + */ + ret = regmap_read_poll_timeout(data->regmap, APDS9306_MAIN_STATUS_REG, + status, data->read_data_available || + (status & (APDS9306_ALS_DATA_STAT_MASK | + APDS9306_ALS_INT_STAT_MASK)), + APDS9306_ALS_READ_DATA_DELAY_US, delay * 2); + if (ret) + return ret; + + /* If we reach here before the interrupt handler we push an event */ + if ((status & APDS9306_ALS_INT_STAT_MASK)) { + if (int_src == APDS9306_INT_SRC_ALS) + ev_code = IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER); + else + ev_code = IIO_MOD_EVENT_CODE(IIO_INTENSITY, 0, + IIO_MOD_LIGHT_CLEAR, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER); + + iio_push_event(indio_dev, ev_code, iio_get_time_ns(indio_dev)); + } + + ret = regmap_bulk_read(data->regmap, reg, buff, sizeof(buff)); + if (ret) { + dev_err_ratelimited(dev, "read data failed\n"); + return ret; + } + + *val = get_unaligned_le24(&buff); + + pm_runtime_mark_last_busy(data->dev); + pm_runtime_put_autosuspend(data->dev); + + return 0; +} + +static int apds9306_intg_time_get(struct apds9306_data *data, int *val2) +{ + struct apds9306_regfields *rf = &data->rf; + int ret, intg_time_idx; + + ret = regmap_field_read(rf->intg_time, &intg_time_idx); + if (ret) + return ret; + + ret = iio_gts_find_int_time_by_sel(&data->gts, intg_time_idx); + if (ret < 0) + return ret; + + *val2 = ret; + + return 0; +} + +static int apds9306_intg_time_set(struct apds9306_data *data, int val2) +{ + struct device *dev = data->dev; + struct apds9306_regfields *rf = &data->rf; + int ret, intg_old, gain_old, gain_new, gain_new_closest, intg_time_idx; + int gain_idx; + bool ok; + + if (!iio_gts_valid_time(&data->gts, val2)) { + dev_err_ratelimited(dev, "Unsupported integration time %u\n", val2); + return -EINVAL; + } + + ret = regmap_field_read(rf->intg_time, &intg_time_idx); + if (ret) + return ret; + + ret = regmap_field_read(rf->gain, &gain_idx); + if (ret) + return ret; + + intg_old = iio_gts_find_int_time_by_sel(&data->gts, intg_time_idx); + if (ret < 0) + return ret; + + if (intg_old == val2) + return 0; + + gain_old = iio_gts_find_gain_by_sel(&data->gts, gain_idx); + if (gain_old < 0) + return gain_old; + + iio_gts_find_new_gain_by_old_gain_time(&data->gts, gain_old, intg_old, + val2, &gain_new); + + if (gain_new < 0) { + dev_err_ratelimited(dev, "Unsupported gain with time\n"); + return gain_new; + } + + gain_new_closest = iio_find_closest_gain_low(&data->gts, gain_new, &ok); + if (gain_new_closest < 0) { + gain_new_closest = iio_gts_get_min_gain(&data->gts); + if (gain_new_closest < 0) + return gain_new_closest; + } + if (!ok) + dev_dbg(dev, "Unable to find optimum gain, setting minimum"); + + ret = iio_gts_find_sel_by_int_time(&data->gts, val2); + if (ret < 0) + return ret; + + ret = regmap_field_write(rf->intg_time, ret); + if (ret) + return ret; + + ret = iio_gts_find_sel_by_gain(&data->gts, gain_new_closest); + if (ret < 0) + return ret; + + return regmap_field_write(rf->gain, ret); +} + +static int apds9306_sampling_freq_get(struct apds9306_data *data, int *val, + int *val2) +{ + struct apds9306_regfields *rf = &data->rf; + int ret, repeat_rate_idx; + + ret = regmap_field_read(rf->repeat_rate, &repeat_rate_idx); + if (ret) + return ret; + + if (repeat_rate_idx >= ARRAY_SIZE(apds9306_repeat_rate_freq)) + return -EINVAL; + + *val = apds9306_repeat_rate_freq[repeat_rate_idx][0]; + *val2 = apds9306_repeat_rate_freq[repeat_rate_idx][1]; + + return 0; +} + +static int apds9306_sampling_freq_set(struct apds9306_data *data, int val, + int val2) +{ + struct apds9306_regfields *rf = &data->rf; + int i; + + for (i = 0; i < ARRAY_SIZE(apds9306_repeat_rate_freq); i++) { + if (apds9306_repeat_rate_freq[i][0] == val && + apds9306_repeat_rate_freq[i][1] == val2) + return regmap_field_write(rf->repeat_rate, i); + } + + return -EINVAL; +} + +static int apds9306_scale_get(struct apds9306_data *data, int *val, int *val2) +{ + struct apds9306_regfields *rf = &data->rf; + int gain, intg, ret, intg_time_idx, gain_idx; + + ret = regmap_field_read(rf->gain, &gain_idx); + if (ret) + return ret; + + ret = regmap_field_read(rf->intg_time, &intg_time_idx); + if (ret) + return ret; + + gain = iio_gts_find_gain_by_sel(&data->gts, gain_idx); + if (gain < 0) + return gain; + + intg = iio_gts_find_int_time_by_sel(&data->gts, intg_time_idx); + if (intg < 0) + return intg; + + return iio_gts_get_scale(&data->gts, gain, intg, val, val2); +} + +static int apds9306_scale_set(struct apds9306_data *data, int val, int val2) +{ + struct apds9306_regfields *rf = &data->rf; + int i, ret, time_sel, gain_sel, intg_time_idx; + + ret = regmap_field_read(rf->intg_time, &intg_time_idx); + if (ret) + return ret; + + ret = iio_gts_find_gain_sel_for_scale_using_time(&data->gts, + intg_time_idx, val, val2, &gain_sel); + if (ret) { + for (i = 0; i < data->gts.num_itime; i++) { + time_sel = data->gts.itime_table[i].sel; + + if (time_sel == intg_time_idx) + continue; + + ret = iio_gts_find_gain_sel_for_scale_using_time(&data->gts, + time_sel, val, val2, &gain_sel); + if (!ret) + break; + } + if (ret) + return -EINVAL; + + ret = regmap_field_write(rf->intg_time, time_sel); + if (ret) + return ret; + } + + return regmap_field_write(rf->gain, gain_sel); +} + +static int apds9306_event_period_get(struct apds9306_data *data, int *val) +{ + struct apds9306_regfields *rf = &data->rf; + int period, ret; + + ret = regmap_field_read(rf->int_persist_val, &period); + if (ret) + return ret; + + if (!in_range(period, 0, APDS9306_ALS_PERSIST_VAL_MAX)) + return -EINVAL; + + *val = period; + + return ret; +} + +static int apds9306_event_period_set(struct apds9306_data *data, int val) +{ + struct apds9306_regfields *rf = &data->rf; + + if (!in_range(val, 0, APDS9306_ALS_PERSIST_VAL_MAX)) + return -EINVAL; + + return regmap_field_write(rf->int_persist_val, val); +} + +static int apds9306_event_thresh_get(struct apds9306_data *data, int dir, + int *val) +{ + int var, ret; + u8 buff[3]; + + if (dir == IIO_EV_DIR_RISING) + var = APDS9306_ALS_THRES_UP_0_REG; + else if (dir == IIO_EV_DIR_FALLING) + var = APDS9306_ALS_THRES_LOW_0_REG; + else + return -EINVAL; + + ret = regmap_bulk_read(data->regmap, var, buff, sizeof(buff)); + if (ret) + return ret; + + *val = get_unaligned_le24(&buff); + + return 0; +} + +static int apds9306_event_thresh_set(struct apds9306_data *data, int dir, + int val) +{ + int var; + u8 buff[3]; + + if (dir == IIO_EV_DIR_RISING) + var = APDS9306_ALS_THRES_UP_0_REG; + else if (dir == IIO_EV_DIR_FALLING) + var = APDS9306_ALS_THRES_LOW_0_REG; + else + return -EINVAL; + + if (!in_range(val, 0, APDS9306_ALS_THRES_VAL_MAX)) + return -EINVAL; + + put_unaligned_le24(val, buff); + + return regmap_bulk_write(data->regmap, var, buff, sizeof(buff)); +} + +static int apds9306_event_thresh_adaptive_get(struct apds9306_data *data, int *val) +{ + struct apds9306_regfields *rf = &data->rf; + int thr_adpt, ret; + + ret = regmap_field_read(rf->int_thresh_var_val, &thr_adpt); + if (ret) + return ret; + + if (!in_range(thr_adpt, 0, APDS9306_ALS_THRES_VAR_VAL_MAX)) + return -EINVAL; + + *val = thr_adpt; + + return ret; +} + +static int apds9306_event_thresh_adaptive_set(struct apds9306_data *data, int val) +{ + struct apds9306_regfields *rf = &data->rf; + + if (!in_range(val, 0, APDS9306_ALS_THRES_VAR_VAL_MAX)) + return -EINVAL; + + return regmap_field_write(rf->int_thresh_var_val, val); +} + +static int apds9306_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + struct apds9306_data *data = iio_priv(indio_dev); + int ret, reg; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (chan->channel2 == IIO_MOD_LIGHT_CLEAR) + reg = APDS9306_CLEAR_DATA_0_REG; + else + reg = APDS9306_ALS_DATA_0_REG; + /* + * Changing device parameters during adc operation, resets + * the ADC which has to avoided. + */ + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + ret = apds9306_read_data(data, val, reg); + iio_device_release_direct_mode(indio_dev); + if (ret) + return ret; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_INT_TIME: + ret = apds9306_intg_time_get(data, val2); + if (ret) + return ret; + *val = 0; + + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_SAMP_FREQ: + ret = apds9306_sampling_freq_get(data, val, val2); + if (ret) + return ret; + + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_SCALE: + ret = apds9306_scale_get(data, val, val2); + if (ret) + return ret; + + return IIO_VAL_INT_PLUS_NANO; + default: + return -EINVAL; + } +}; + +static int apds9306_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + struct apds9306_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + return iio_gts_avail_times(&data->gts, vals, type, length); + case IIO_CHAN_INFO_SCALE: + return iio_gts_all_avail_scales(&data->gts, vals, type, length); + case IIO_CHAN_INFO_SAMP_FREQ: + *length = ARRAY_SIZE(apds9306_repeat_rate_freq) * 2; + *vals = (const int *)apds9306_repeat_rate_freq; + *type = IIO_VAL_INT_PLUS_MICRO; + + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + +static int apds9306_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_SCALE: + return IIO_VAL_INT_PLUS_NANO; + case IIO_CHAN_INFO_INT_TIME: + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_SAMP_FREQ: + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } +} + +static int apds9306_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + struct apds9306_data *data = iio_priv(indio_dev); + + guard(mutex)(&data->mutex); + + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + if (val) + return -EINVAL; + return apds9306_intg_time_set(data, val2); + case IIO_CHAN_INFO_SCALE: + return apds9306_scale_set(data, val, val2); + case IIO_CHAN_INFO_SAMP_FREQ: + return apds9306_sampling_freq_set(data, val, val2); + default: + return -EINVAL; + } +} + +static irqreturn_t apds9306_irq_handler(int irq, void *priv) +{ + struct iio_dev *indio_dev = priv; + struct apds9306_data *data = iio_priv(indio_dev); + struct apds9306_regfields *rf = &data->rf; + u64 ev_code; + int ret, status, int_src; + + /* + * The interrupt line is released and the interrupt flag is + * cleared as a result of reading the status register. All the + * status flags are cleared as a result of this read. + */ + ret = regmap_read(data->regmap, APDS9306_MAIN_STATUS_REG, &status); + if (ret < 0) { + dev_err_ratelimited(data->dev, "status reg read failed\n"); + return IRQ_HANDLED; + } + + ret = regmap_field_read(rf->int_src, &int_src); + if (ret) + return ret; + + if ((status & APDS9306_ALS_INT_STAT_MASK)) { + if (int_src == APDS9306_INT_SRC_ALS) + ev_code = IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER); + else + ev_code = IIO_MOD_EVENT_CODE(IIO_INTENSITY, 0, + IIO_MOD_LIGHT_CLEAR, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_EITHER); + + iio_push_event(indio_dev, ev_code, iio_get_time_ns(indio_dev)); + } + + /* + * If a one-shot read through sysfs is underway at the same time + * as this interrupt handler is executing and a read data available + * flag was set, this flag is set to inform read_poll_timeout() + * to exit. + */ + if ((status & APDS9306_ALS_DATA_STAT_MASK)) + data->read_data_available = 1; + + return IRQ_HANDLED; +} + +static int apds9306_read_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + struct apds9306_data *data = iio_priv(indio_dev); + int ret; + + switch (type) { + case IIO_EV_TYPE_THRESH: + if (dir == IIO_EV_DIR_EITHER && info == IIO_EV_INFO_PERIOD) + ret = apds9306_event_period_get(data, val); + else + ret = apds9306_event_thresh_get(data, dir, val); + if (ret) + return ret; + + return IIO_VAL_INT; + case IIO_EV_TYPE_THRESH_ADAPTIVE: + ret = apds9306_event_thresh_adaptive_get(data, val); + if (ret) + return ret; + + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static int apds9306_write_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + struct apds9306_data *data = iio_priv(indio_dev); + + switch (type) { + case IIO_EV_TYPE_THRESH: + if (dir == IIO_EV_DIR_EITHER && info == IIO_EV_INFO_PERIOD) + return apds9306_event_period_set(data, val); + + return apds9306_event_thresh_set(data, dir, val); + case IIO_EV_TYPE_THRESH_ADAPTIVE: + return apds9306_event_thresh_adaptive_set(data, val); + default: + return -EINVAL; + } +} + +static int apds9306_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct apds9306_data *data = iio_priv(indio_dev); + struct apds9306_regfields *rf = &data->rf; + int int_en, int_src, ret; + + switch (type) { + case IIO_EV_TYPE_THRESH: { + guard(mutex)(&data->mutex); + + ret = regmap_field_read(rf->int_src, &int_src); + if (ret) + return ret; + + ret = regmap_field_read(rf->int_en, &int_en); + if (ret) + return ret; + + if (chan->type == IIO_LIGHT) + return int_en && (int_src == APDS9306_INT_SRC_ALS); + + if (chan->type == IIO_INTENSITY) + return int_en && (int_src == APDS9306_INT_SRC_CLEAR); + + return -EINVAL; + } + case IIO_EV_TYPE_THRESH_ADAPTIVE: + ret = regmap_field_read(rf->int_thresh_var_en, &int_en); + if (ret) + return ret; + + return int_en; + default: + return -EINVAL; + } +} + +static int apds9306_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int state) +{ + struct apds9306_data *data = iio_priv(indio_dev); + struct apds9306_regfields *rf = &data->rf; + int ret, enabled; + + switch (type) { + case IIO_EV_TYPE_THRESH: { + guard(mutex)(&data->mutex); + + ret = regmap_field_read(rf->int_en, &enabled); + if (ret) + return ret; + + /* + * If interrupt is enabled, the channel is set before enabling + * the interrupt. In case of disable, no need to switch + * channels. In case of different channel is selected while + * interrupt in on, just change the channel. + */ + if (state) { + if (chan->type == IIO_LIGHT) + ret = regmap_field_write(rf->int_src, 1); + else if (chan->type == IIO_INTENSITY) + ret = regmap_field_write(rf->int_src, 0); + else + return -EINVAL; + + if (ret) + return ret; + + if (enabled) + return 0; + + ret = regmap_field_write(rf->int_en, 1); + if (ret) + return ret; + + return pm_runtime_resume_and_get(data->dev); + } else { + if (!enabled) + return 0; + + ret = regmap_field_write(rf->int_en, 0); + if (ret) + return ret; + + pm_runtime_mark_last_busy(data->dev); + pm_runtime_put_autosuspend(data->dev); + + return 0; + } + } + case IIO_EV_TYPE_THRESH_ADAPTIVE: + if (state) + return regmap_field_write(rf->int_thresh_var_en, 1); + else + return regmap_field_write(rf->int_thresh_var_en, 0); + default: + return -EINVAL; + } +} + +static const struct iio_info apds9306_info_no_events = { + .read_avail = apds9306_read_avail, + .read_raw = apds9306_read_raw, + .write_raw = apds9306_write_raw, + .write_raw_get_fmt = apds9306_write_raw_get_fmt, +}; + +static const struct iio_info apds9306_info = { + .read_avail = apds9306_read_avail, + .read_raw = apds9306_read_raw, + .write_raw = apds9306_write_raw, + .write_raw_get_fmt = apds9306_write_raw_get_fmt, + .read_event_value = apds9306_read_event, + .write_event_value = apds9306_write_event, + .read_event_config = apds9306_read_event_config, + .write_event_config = apds9306_write_event_config, + .event_attrs = &apds9306_event_attr_group, +}; + +static int apds9306_init_iio_gts(struct apds9306_data *data) +{ + int i, ret, part_id; + + ret = regmap_read(data->regmap, APDS9306_PART_ID_REG, &part_id); + if (ret) + return ret; + + for (i = 0; i < ARRAY_SIZE(apds9306_gts_mul); i++) + if (part_id == apds9306_gts_mul[i].part_id) + break; + + if (i == ARRAY_SIZE(apds9306_gts_mul)) + return -ENOENT; + + return devm_iio_init_iio_gts(data->dev, + apds9306_gts_mul[i].max_scale_int, + apds9306_gts_mul[i].max_scale_nano, + apds9306_gains, ARRAY_SIZE(apds9306_gains), + apds9306_itimes, ARRAY_SIZE(apds9306_itimes), + &data->gts); +} + +static void apds9306_powerdown(void *ptr) +{ + struct apds9306_data *data = (struct apds9306_data *)ptr; + struct apds9306_regfields *rf = &data->rf; + int ret; + + ret = regmap_field_write(rf->int_thresh_var_en, 0); + if (ret) + return; + + ret = regmap_field_write(rf->int_en, 0); + if (ret) + return; + + apds9306_power_state(data, false); +} + +static int apds9306_device_init(struct apds9306_data *data) +{ + struct apds9306_regfields *rf = &data->rf; + int ret; + + ret = apds9306_init_iio_gts(data); + if (ret) + return ret; + + ret = regmap_field_write(rf->intg_time, APDS9306_MEAS_MODE_100MS); + if (ret) + return ret; + + ret = regmap_field_write(rf->repeat_rate, APDS9306_SAMP_FREQ_10HZ); + if (ret) + return ret; + + ret = regmap_field_write(rf->gain, APDS9306_GSEL_3X); + if (ret) + return ret; + + ret = regmap_field_write(rf->int_src, APDS9306_INT_SRC_ALS); + if (ret) + return ret; + + ret = regmap_field_write(rf->int_en, 0); + if (ret) + return ret; + + return regmap_field_write(rf->int_thresh_var_en, 0); +} + +static int apds9306_pm_init(struct apds9306_data *data) +{ + struct device *dev = data->dev; + int ret; + + ret = apds9306_power_state(data, true); + if (ret) + return ret; + + ret = pm_runtime_set_active(dev); + if (ret) + return ret; + + ret = devm_pm_runtime_enable(dev); + if (ret) + return ret; + + pm_runtime_set_autosuspend_delay(dev, 5000); + pm_runtime_use_autosuspend(dev); + pm_runtime_get(dev); + + return 0; +} + +static int apds9306_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct apds9306_data *data; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + + mutex_init(&data->mutex); + + data->regmap = devm_regmap_init_i2c(client, &apds9306_regmap); + if (IS_ERR(data->regmap)) + return dev_err_probe(dev, PTR_ERR(data->regmap), + "regmap initialization failed\n"); + + data->dev = dev; + i2c_set_clientdata(client, indio_dev); + + ret = apds9306_regfield_init(data); + if (ret) + return dev_err_probe(dev, ret, "regfield initialization failed\n"); + + ret = devm_regulator_get_enable(dev, "vdd"); + if (ret) + return dev_err_probe(dev, ret, "Failed to enable regulator\n"); + + indio_dev->name = "apds9306"; + indio_dev->modes = INDIO_DIRECT_MODE; + if (client->irq) { + indio_dev->info = &apds9306_info; + indio_dev->channels = apds9306_channels_with_events; + indio_dev->num_channels = ARRAY_SIZE(apds9306_channels_with_events); + ret = devm_request_threaded_irq(dev, client->irq, NULL, + apds9306_irq_handler, IRQF_ONESHOT, + "apds9306_event", indio_dev); + if (ret) + return dev_err_probe(dev, ret, + "failed to assign interrupt.\n"); + } else { + indio_dev->info = &apds9306_info_no_events; + indio_dev->channels = apds9306_channels_without_events; + indio_dev->num_channels = + ARRAY_SIZE(apds9306_channels_without_events); + } + + ret = apds9306_pm_init(data); + if (ret) + return dev_err_probe(dev, ret, "failed pm init\n"); + + ret = apds9306_device_init(data); + if (ret) + return dev_err_probe(dev, ret, "failed to init device\n"); + + ret = devm_add_action_or_reset(dev, apds9306_powerdown, data); + if (ret) + return dev_err_probe(dev, ret, "failed to add action or reset\n"); + + ret = devm_iio_device_register(dev, indio_dev); + if (ret) + return dev_err_probe(dev, ret, "failed iio device registration\n"); + + pm_runtime_put_autosuspend(dev); + + return 0; +} + +static int apds9306_runtime_suspend(struct device *dev) +{ + struct apds9306_data *data = iio_priv(dev_get_drvdata(dev)); + + return apds9306_power_state(data, false); +} + +static int apds9306_runtime_resume(struct device *dev) +{ + struct apds9306_data *data = iio_priv(dev_get_drvdata(dev)); + + return apds9306_power_state(data, true); +} + +static DEFINE_RUNTIME_DEV_PM_OPS(apds9306_pm_ops, + apds9306_runtime_suspend, + apds9306_runtime_resume, + NULL); + +static const struct of_device_id apds9306_of_match[] = { + { .compatible = "avago,apds9306" }, + { } +}; +MODULE_DEVICE_TABLE(of, apds9306_of_match); + +static struct i2c_driver apds9306_driver = { + .driver = { + .name = "apds9306", + .pm = pm_ptr(&apds9306_pm_ops), + .of_match_table = apds9306_of_match, + }, + .probe = apds9306_probe, +}; +module_i2c_driver(apds9306_driver); + +MODULE_AUTHOR("Subhajit Ghosh <subhajit.ghosh@tweaklogic.com>"); +MODULE_DESCRIPTION("APDS9306 Ambient Light Sensor driver"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(IIO_GTS_HELPER); diff --git a/drivers/iio/light/st_uvis25_core.c b/drivers/iio/light/st_uvis25_core.c index 50f95c5d2060aa..d4e17079b2f43a 100644 --- a/drivers/iio/light/st_uvis25_core.c +++ b/drivers/iio/light/st_uvis25_core.c @@ -291,7 +291,7 @@ int st_uvis25_probe(struct device *dev, int irq, struct regmap *regmap) if (!iio_dev) return -ENOMEM; - dev_set_drvdata(dev, (void *)iio_dev); + dev_set_drvdata(dev, iio_dev); hw = iio_priv(iio_dev); hw->irq = irq; diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index 62e9e93d915dc8..09f53d987c7df5 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -27,20 +27,20 @@ #include <linux/bitops.h> #include <linux/bitfield.h> -#include <linux/device.h> -#include <linux/module.h> -#include <linux/nvmem-provider.h> -#include <linux/regmap.h> +#include <linux/completion.h> #include <linux/delay.h> -#include <linux/iio/iio.h> -#include <linux/iio/sysfs.h> +#include <linux/device.h> #include <linux/gpio/consumer.h> -#include <linux/regulator/consumer.h> #include <linux/interrupt.h> #include <linux/irq.h> /* For irq_get_irq_data() */ -#include <linux/completion.h> +#include <linux/module.h> +#include <linux/nvmem-provider.h> #include <linux/pm_runtime.h> #include <linux/random.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +#include <linux/iio/iio.h> #include <asm/unaligned.h> diff --git a/drivers/iio/pressure/dps310.c b/drivers/iio/pressure/dps310.c index 1ff091b2f764d4..7d882e15e5564a 100644 --- a/drivers/iio/pressure/dps310.c +++ b/drivers/iio/pressure/dps310.c @@ -171,7 +171,7 @@ static int dps310_temp_workaround(struct dps310_data *data) int reg; rc = regmap_read(data->regmap, 0x32, ®); - if (rc) + if (rc < 0) return rc; /* @@ -256,24 +256,24 @@ static int dps310_startup(struct dps310_data *data) return dps310_temp_workaround(data); } -static int dps310_get_pres_precision(struct dps310_data *data) +static int dps310_get_pres_precision(struct dps310_data *data, int *val) { - int rc; - int val; + int reg_val, rc; - rc = regmap_read(data->regmap, DPS310_PRS_CFG, &val); + rc = regmap_read(data->regmap, DPS310_PRS_CFG, ®_val); if (rc < 0) return rc; - return BIT(val & GENMASK(2, 0)); + *val = BIT(reg_val & GENMASK(2, 0)); + + return 0; } -static int dps310_get_temp_precision(struct dps310_data *data) +static int dps310_get_temp_precision(struct dps310_data *data, int *val) { - int rc; - int val; + int reg_val, rc; - rc = regmap_read(data->regmap, DPS310_TMP_CFG, &val); + rc = regmap_read(data->regmap, DPS310_TMP_CFG, ®_val); if (rc < 0) return rc; @@ -281,7 +281,9 @@ static int dps310_get_temp_precision(struct dps310_data *data) * Scale factor is bottom 4 bits of the register, but 1111 is * reserved so just grab bottom three */ - return BIT(val & GENMASK(2, 0)); + *val = BIT(reg_val & GENMASK(2, 0)); + + return 0; } /* Called with lock held */ @@ -350,48 +352,56 @@ static int dps310_set_temp_samp_freq(struct dps310_data *data, int freq) DPS310_TMP_RATE_BITS, val); } -static int dps310_get_pres_samp_freq(struct dps310_data *data) +static int dps310_get_pres_samp_freq(struct dps310_data *data, int *val) { - int rc; - int val; + int reg_val, rc; - rc = regmap_read(data->regmap, DPS310_PRS_CFG, &val); + rc = regmap_read(data->regmap, DPS310_PRS_CFG, ®_val); if (rc < 0) return rc; - return BIT((val & DPS310_PRS_RATE_BITS) >> 4); + *val = BIT((reg_val & DPS310_PRS_RATE_BITS) >> 4); + + return 0; } -static int dps310_get_temp_samp_freq(struct dps310_data *data) +static int dps310_get_temp_samp_freq(struct dps310_data *data, int *val) { - int rc; - int val; + int reg_val, rc; - rc = regmap_read(data->regmap, DPS310_TMP_CFG, &val); + rc = regmap_read(data->regmap, DPS310_TMP_CFG, ®_val); if (rc < 0) return rc; - return BIT((val & DPS310_TMP_RATE_BITS) >> 4); + *val = BIT((reg_val & DPS310_TMP_RATE_BITS) >> 4); + + return 0; } -static int dps310_get_pres_k(struct dps310_data *data) +static int dps310_get_pres_k(struct dps310_data *data, int *val) { - int rc = dps310_get_pres_precision(data); + int reg_val, rc; + rc = regmap_read(data->regmap, DPS310_PRS_CFG, ®_val); if (rc < 0) return rc; - return scale_factors[ilog2(rc)]; + *val = scale_factors[reg_val & GENMASK(2, 0)]; + + return 0; } -static int dps310_get_temp_k(struct dps310_data *data) +static int dps310_get_temp_k(struct dps310_data *data, int *val) { - int rc = dps310_get_temp_precision(data); + int reg_val, rc; + rc = regmap_read(data->regmap, DPS310_TMP_CFG, ®_val); if (rc < 0) return rc; - return scale_factors[ilog2(rc)]; + *val = scale_factors[reg_val & GENMASK(2, 0)]; + + return 0; } static int dps310_reset_wait(struct dps310_data *data) @@ -464,7 +474,10 @@ static int dps310_read_pres_raw(struct dps310_data *data) if (mutex_lock_interruptible(&data->lock)) return -EINTR; - rate = dps310_get_pres_samp_freq(data); + rc = dps310_get_pres_samp_freq(data, &rate); + if (rc) + goto done; + timeout = DPS310_POLL_TIMEOUT_US(rate); /* Poll for sensor readiness; base the timeout upon the sample rate. */ @@ -510,7 +523,10 @@ static int dps310_read_temp_raw(struct dps310_data *data) if (mutex_lock_interruptible(&data->lock)) return -EINTR; - rate = dps310_get_temp_samp_freq(data); + rc = dps310_get_temp_samp_freq(data, &rate); + if (rc) + goto done; + timeout = DPS310_POLL_TIMEOUT_US(rate); /* Poll for sensor readiness; base the timeout upon the sample rate. */ @@ -612,13 +628,13 @@ static int dps310_write_raw(struct iio_dev *iio, return rc; } -static int dps310_calculate_pressure(struct dps310_data *data) +static int dps310_calculate_pressure(struct dps310_data *data, int *val) { int i; int rc; int t_ready; - int kpi = dps310_get_pres_k(data); - int kti = dps310_get_temp_k(data); + int kpi; + int kti; s64 rem = 0ULL; s64 pressure = 0ULL; s64 p; @@ -629,11 +645,13 @@ static int dps310_calculate_pressure(struct dps310_data *data) s64 kp; s64 kt; - if (kpi < 0) - return kpi; + rc = dps310_get_pres_k(data, &kpi); + if (rc) + return rc; - if (kti < 0) - return kti; + rc = dps310_get_temp_k(data, &kti); + if (rc) + return rc; kp = (s64)kpi; kt = (s64)kti; @@ -687,7 +705,9 @@ static int dps310_calculate_pressure(struct dps310_data *data) if (pressure < 0LL) return -ERANGE; - return (int)min_t(s64, pressure, INT_MAX); + *val = (int)min_t(s64, pressure, INT_MAX); + + return 0; } static int dps310_read_pressure(struct dps310_data *data, int *val, int *val2, @@ -697,11 +717,10 @@ static int dps310_read_pressure(struct dps310_data *data, int *val, int *val2, switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: - rc = dps310_get_pres_samp_freq(data); - if (rc < 0) + rc = dps310_get_pres_samp_freq(data, val); + if (rc) return rc; - *val = rc; return IIO_VAL_INT; case IIO_CHAN_INFO_PROCESSED: @@ -709,20 +728,17 @@ static int dps310_read_pressure(struct dps310_data *data, int *val, int *val2, if (rc) return rc; - rc = dps310_calculate_pressure(data); - if (rc < 0) + rc = dps310_calculate_pressure(data, val); + if (rc) return rc; - *val = rc; *val2 = 1000; /* Convert Pa to KPa per IIO ABI */ return IIO_VAL_FRACTIONAL; case IIO_CHAN_INFO_OVERSAMPLING_RATIO: - rc = dps310_get_pres_precision(data); - if (rc < 0) + rc = dps310_get_pres_precision(data, val); + if (rc) return rc; - - *val = rc; return IIO_VAL_INT; default: @@ -730,14 +746,15 @@ static int dps310_read_pressure(struct dps310_data *data, int *val, int *val2, } } -static int dps310_calculate_temp(struct dps310_data *data) +static int dps310_calculate_temp(struct dps310_data *data, int *val) { s64 c0; s64 t; - int kt = dps310_get_temp_k(data); + int kt, rc; - if (kt < 0) - return kt; + rc = dps310_get_temp_k(data, &kt); + if (rc) + return rc; /* Obtain inverse-scaled offset */ c0 = div_s64((s64)kt * (s64)data->c0, 2); @@ -746,7 +763,9 @@ static int dps310_calculate_temp(struct dps310_data *data) t = c0 + ((s64)data->temp_raw * (s64)data->c1); /* Convert to milliCelsius and scale the temperature */ - return (int)div_s64(t * 1000LL, kt); + *val = (int)div_s64(t * 1000LL, kt); + + return 0; } static int dps310_read_temp(struct dps310_data *data, int *val, int *val2, @@ -756,11 +775,10 @@ static int dps310_read_temp(struct dps310_data *data, int *val, int *val2, switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: - rc = dps310_get_temp_samp_freq(data); - if (rc < 0) + rc = dps310_get_temp_samp_freq(data, val); + if (rc) return rc; - *val = rc; return IIO_VAL_INT; case IIO_CHAN_INFO_PROCESSED: @@ -768,19 +786,17 @@ static int dps310_read_temp(struct dps310_data *data, int *val, int *val2, if (rc) return rc; - rc = dps310_calculate_temp(data); - if (rc < 0) + rc = dps310_calculate_temp(data, val); + if (rc) return rc; - *val = rc; return IIO_VAL_INT; case IIO_CHAN_INFO_OVERSAMPLING_RATIO: - rc = dps310_get_temp_precision(data); - if (rc < 0) + rc = dps310_get_temp_precision(data, val); + if (rc) return rc; - *val = rc; return IIO_VAL_INT; default: diff --git a/drivers/iio/pressure/hsc030pa_spi.c b/drivers/iio/pressure/hsc030pa_spi.c index 818fa630345450..337eecc577d2a2 100644 --- a/drivers/iio/pressure/hsc030pa_spi.c +++ b/drivers/iio/pressure/hsc030pa_spi.c @@ -23,14 +23,9 @@ static int hsc_spi_recv(struct hsc_data *data) { struct spi_device *spi = to_spi_device(data->dev); - struct spi_transfer xfer = { - .tx_buf = NULL, - .rx_buf = data->buffer, - .len = HSC_REG_MEASUREMENT_RD_SIZE, - }; msleep_interruptible(HSC_RESP_TIME_MS); - return spi_sync_transfer(spi, &xfer, 1); + return spi_read(spi, data->buffer, HSC_REG_MEASUREMENT_RD_SIZE); } static int hsc_spi_probe(struct spi_device *spi) diff --git a/drivers/iio/temperature/ltc2983.c b/drivers/iio/temperature/ltc2983.c index 39447c786af342..24d19f3c729274 100644 --- a/drivers/iio/temperature/ltc2983.c +++ b/drivers/iio/temperature/ltc2983.c @@ -16,6 +16,7 @@ #include <linux/module.h> #include <linux/property.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> #include <linux/spi/spi.h> #include <asm/byteorder.h> @@ -657,7 +658,6 @@ ltc2983_thermocouple_new(const struct fwnode_handle *child, struct ltc2983_data const struct ltc2983_sensor *sensor) { struct ltc2983_thermocouple *thermo; - struct fwnode_handle *ref; u32 oc_current; int ret; @@ -704,7 +704,8 @@ ltc2983_thermocouple_new(const struct fwnode_handle *child, struct ltc2983_data return ERR_PTR(-EINVAL); } - ref = fwnode_find_reference(child, "adi,cold-junction-handle", 0); + struct fwnode_handle *ref __free(fwnode_handle) = + fwnode_find_reference(child, "adi,cold-junction-handle", 0); if (IS_ERR(ref)) { ref = NULL; } else { @@ -715,7 +716,7 @@ ltc2983_thermocouple_new(const struct fwnode_handle *child, struct ltc2983_data * the error right away. */ dev_err(&st->spi->dev, "Property reg must be given\n"); - goto fail; + return ERR_PTR(ret); } } @@ -726,22 +727,15 @@ ltc2983_thermocouple_new(const struct fwnode_handle *child, struct ltc2983_data thermo->custom = __ltc2983_custom_sensor_new(st, child, propname, false, 16384, true); - if (IS_ERR(thermo->custom)) { - ret = PTR_ERR(thermo->custom); - goto fail; - } + if (IS_ERR(thermo->custom)) + return ERR_CAST(thermo->custom); } /* set common parameters */ thermo->sensor.fault_handler = ltc2983_thermocouple_fault_handler; thermo->sensor.assign_chan = ltc2983_thermocouple_assign_chan; - fwnode_handle_put(ref); return &thermo->sensor; - -fail: - fwnode_handle_put(ref); - return ERR_PTR(ret); } static struct ltc2983_sensor * @@ -751,14 +745,14 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st, struct ltc2983_rtd *rtd; int ret = 0; struct device *dev = &st->spi->dev; - struct fwnode_handle *ref; u32 excitation_current = 0, n_wires = 0; rtd = devm_kzalloc(dev, sizeof(*rtd), GFP_KERNEL); if (!rtd) return ERR_PTR(-ENOMEM); - ref = fwnode_find_reference(child, "adi,rsense-handle", 0); + struct fwnode_handle *ref __free(fwnode_handle) = + fwnode_find_reference(child, "adi,rsense-handle", 0); if (IS_ERR(ref)) { dev_err(dev, "Property adi,rsense-handle missing or invalid"); return ERR_CAST(ref); @@ -767,7 +761,7 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st, ret = fwnode_property_read_u32(ref, "reg", &rtd->r_sense_chan); if (ret) { dev_err(dev, "Property reg must be given\n"); - goto fail; + return ERR_PTR(ret); } ret = fwnode_property_read_u32(child, "adi,number-of-wires", &n_wires); @@ -788,8 +782,7 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st, break; default: dev_err(dev, "Invalid number of wires:%u\n", n_wires); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } } @@ -799,8 +792,7 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st, if (n_wires == 2 || n_wires == 3) { dev_err(dev, "Rotation not allowed for 2/3 Wire RTDs"); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } rtd->sensor_config |= LTC2983_RTD_C_ROTATE(1); } else { @@ -830,16 +822,14 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st, "Invalid rsense chann:%d to use in kelvin rsense", rtd->r_sense_chan); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } if (sensor->chan < min || sensor->chan > max) { dev_err(dev, "Invalid chann:%d for the rtd config", sensor->chan); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } } else { /* same as differential case */ @@ -847,8 +837,7 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st, dev_err(&st->spi->dev, "Invalid chann:%d for RTD", sensor->chan); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } } @@ -857,10 +846,8 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st, rtd->custom = __ltc2983_custom_sensor_new(st, child, "adi,custom-rtd", false, 2048, false); - if (IS_ERR(rtd->custom)) { - ret = PTR_ERR(rtd->custom); - goto fail; - } + if (IS_ERR(rtd->custom)) + return ERR_CAST(rtd->custom); } /* set common parameters */ @@ -902,18 +889,13 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st, dev_err(&st->spi->dev, "Invalid value for excitation current(%u)", excitation_current); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } } fwnode_property_read_u32(child, "adi,rtd-curve", &rtd->rtd_curve); - fwnode_handle_put(ref); return &rtd->sensor; -fail: - fwnode_handle_put(ref); - return ERR_PTR(ret); } static struct ltc2983_sensor * @@ -922,7 +904,6 @@ ltc2983_thermistor_new(const struct fwnode_handle *child, struct ltc2983_data *s { struct ltc2983_thermistor *thermistor; struct device *dev = &st->spi->dev; - struct fwnode_handle *ref; u32 excitation_current = 0; int ret = 0; @@ -930,7 +911,8 @@ ltc2983_thermistor_new(const struct fwnode_handle *child, struct ltc2983_data *s if (!thermistor) return ERR_PTR(-ENOMEM); - ref = fwnode_find_reference(child, "adi,rsense-handle", 0); + struct fwnode_handle *ref __free(fwnode_handle) = + fwnode_find_reference(child, "adi,rsense-handle", 0); if (IS_ERR(ref)) { dev_err(dev, "Property adi,rsense-handle missing or invalid"); return ERR_CAST(ref); @@ -939,7 +921,7 @@ ltc2983_thermistor_new(const struct fwnode_handle *child, struct ltc2983_data *s ret = fwnode_property_read_u32(ref, "reg", &thermistor->r_sense_chan); if (ret) { dev_err(dev, "rsense channel must be configured...\n"); - goto fail; + return ERR_PTR(ret); } if (fwnode_property_read_bool(child, "adi,single-ended")) { @@ -959,8 +941,7 @@ ltc2983_thermistor_new(const struct fwnode_handle *child, struct ltc2983_data *s dev_err(&st->spi->dev, "Invalid chann:%d for differential thermistor", sensor->chan); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } /* check custom sensor */ @@ -979,10 +960,8 @@ ltc2983_thermistor_new(const struct fwnode_handle *child, struct ltc2983_data *s propname, steinhart, 64, false); - if (IS_ERR(thermistor->custom)) { - ret = PTR_ERR(thermistor->custom); - goto fail; - } + if (IS_ERR(thermistor->custom)) + return ERR_CAST(thermistor->custom); } /* set common parameters */ thermistor->sensor.fault_handler = ltc2983_common_fault_handler; @@ -1006,8 +985,7 @@ ltc2983_thermistor_new(const struct fwnode_handle *child, struct ltc2983_data *s LTC2983_SENSOR_THERMISTOR_STEINHART) { dev_err(&st->spi->dev, "Auto Range not allowed for custom sensors\n"); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } thermistor->excitation_current = 0x0c; break; @@ -1048,16 +1026,11 @@ ltc2983_thermistor_new(const struct fwnode_handle *child, struct ltc2983_data *s dev_err(&st->spi->dev, "Invalid value for excitation current(%u)", excitation_current); - ret = -EINVAL; - goto fail; + return ERR_PTR(-EINVAL); } } - fwnode_handle_put(ref); return &thermistor->sensor; -fail: - fwnode_handle_put(ref); - return ERR_PTR(ret); } static struct ltc2983_sensor * @@ -1350,8 +1323,7 @@ static irqreturn_t ltc2983_irq_handler(int irq, void *data) static int ltc2983_parse_fw(struct ltc2983_data *st) { struct device *dev = &st->spi->dev; - struct fwnode_handle *child; - int ret = 0, chan = 0, channel_avail_mask = 0; + int ret, chan = 0, channel_avail_mask = 0; device_property_read_u32(dev, "adi,mux-delay-config-us", &st->mux_delay_config); @@ -1369,38 +1341,35 @@ static int ltc2983_parse_fw(struct ltc2983_data *st) return -ENOMEM; st->iio_channels = st->num_channels; - device_for_each_child_node(dev, child) { + device_for_each_child_node_scoped(dev, child) { struct ltc2983_sensor sensor; ret = fwnode_property_read_u32(child, "reg", &sensor.chan); - if (ret) { - dev_err(dev, "reg property must given for child nodes\n"); - goto put_child; - } + if (ret) + return dev_err_probe(dev, ret, + "reg property must given for child nodes\n"); /* check if we have a valid channel */ if (sensor.chan < LTC2983_MIN_CHANNELS_NR || - sensor.chan > st->info->max_channels_nr) { - ret = -EINVAL; - dev_err(dev, "chan:%d must be from %u to %u\n", sensor.chan, - LTC2983_MIN_CHANNELS_NR, st->info->max_channels_nr); - goto put_child; - } else if (channel_avail_mask & BIT(sensor.chan)) { - ret = -EINVAL; - dev_err(dev, "chan:%d already in use\n", sensor.chan); - goto put_child; - } + sensor.chan > st->info->max_channels_nr) + return dev_err_probe(dev, -EINVAL, + "chan:%d must be from %u to %u\n", + sensor.chan, + LTC2983_MIN_CHANNELS_NR, + st->info->max_channels_nr); + + if (channel_avail_mask & BIT(sensor.chan)) + return dev_err_probe(dev, -EINVAL, + "chan:%d already in use\n", + sensor.chan); ret = fwnode_property_read_u32(child, "adi,sensor-type", &sensor.type); - if (ret) { - dev_err(dev, + if (ret) + return dev_err_probe(dev, ret, "adi,sensor-type property must given for child nodes\n"); - goto put_child; - } dev_dbg(dev, "Create new sensor, type %u, chann %u", - sensor.type, - sensor.chan); + sensor.type, sensor.chan); if (sensor.type >= LTC2983_SENSOR_THERMOCOUPLE && sensor.type <= LTC2983_SENSOR_THERMOCOUPLE_CUSTOM) { @@ -1427,17 +1396,15 @@ static int ltc2983_parse_fw(struct ltc2983_data *st) sensor.type == LTC2983_SENSOR_ACTIVE_TEMP) { st->sensors[chan] = ltc2983_temp_new(child, st, &sensor); } else { - dev_err(dev, "Unknown sensor type %d\n", sensor.type); - ret = -EINVAL; - goto put_child; + return dev_err_probe(dev, -EINVAL, + "Unknown sensor type %d\n", + sensor.type); } - if (IS_ERR(st->sensors[chan])) { - dev_err(dev, "Failed to create sensor %ld", - PTR_ERR(st->sensors[chan])); - ret = PTR_ERR(st->sensors[chan]); - goto put_child; - } + if (IS_ERR(st->sensors[chan])) + return dev_err_probe(dev, PTR_ERR(st->sensors[chan]), + "Failed to create sensor\n"); + /* set generic sensor parameters */ st->sensors[chan]->chan = sensor.chan; st->sensors[chan]->type = sensor.type; @@ -1447,9 +1414,6 @@ static int ltc2983_parse_fw(struct ltc2983_data *st) } return 0; -put_child: - fwnode_handle_put(child); - return ret; } static int ltc2983_eeprom_cmd(struct ltc2983_data *st, unsigned int cmd, @@ -1634,6 +1598,10 @@ static int ltc2983_probe(struct spi_device *spi) if (ret) return ret; + ret = devm_regulator_get_enable(&spi->dev, "vdd"); + if (ret) + return ret; + gpio = devm_gpiod_get_optional(&st->spi->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(gpio)) return PTR_ERR(gpio); diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 4fb291f0bf7c89..801ed229ed7dc1 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -506,6 +506,17 @@ config OPEN_DICE If unsure, say N. +config NTSYNC + tristate "NT synchronization primitive emulation" + help + This module provides kernel support for emulation of Windows NT + synchronization primitives. It is not a hardware driver. + + To compile this driver as a module, choose M here: the + module will be called ntsync. + + If unsure, say N. + config VCPU_STALL_DETECTOR tristate "Guest vCPU stall detector" depends on OF && HAS_IOMEM diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index ea6ea5bbbc9c62..153a3f4837e8ca 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -59,6 +59,7 @@ obj-$(CONFIG_PVPANIC) += pvpanic/ obj-$(CONFIG_UACCE) += uacce/ obj-$(CONFIG_XILINX_SDFEC) += xilinx_sdfec.o obj-$(CONFIG_HISI_HIKEY_USB) += hisi_hikey_usb.o +obj-$(CONFIG_NTSYNC) += ntsync.o obj-$(CONFIG_HI6421V600_IRQ) += hi6421v600-irq.o obj-$(CONFIG_OPEN_DICE) += open-dice.o obj-$(CONFIG_GP_PCI1XXXX) += mchp_pci1xxxx/ diff --git a/drivers/misc/ds1682.c b/drivers/misc/ds1682.c index 21fc5bc85c5c8c..5f8dcd0e384865 100644 --- a/drivers/misc/ds1682.c +++ b/drivers/misc/ds1682.c @@ -32,6 +32,7 @@ #include <linux/i2c.h> #include <linux/string.h> #include <linux/list.h> +#include <linux/nvmem-provider.h> #include <linux/sysfs.h> #include <linux/ctype.h> #include <linux/hwmon-sysfs.h> @@ -197,11 +198,43 @@ static const struct bin_attribute ds1682_eeprom_attr = { .write = ds1682_eeprom_write, }; +static int ds1682_nvmem_read(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + struct i2c_client *client = priv; + int ret; + + ret = i2c_smbus_read_i2c_block_data(client, DS1682_REG_EEPROM + offset, + bytes, val); + return ret < 0 ? ret : 0; +} + +static int ds1682_nvmem_write(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + struct i2c_client *client = priv; + int ret; + + ret = i2c_smbus_write_i2c_block_data(client, DS1682_REG_EEPROM + offset, + bytes, val); + return ret < 0 ? ret : 0; +} + /* * Called when a ds1682 device is matched with this driver */ static int ds1682_probe(struct i2c_client *client) { + struct nvmem_config config = { + .dev = &client->dev, + .owner = THIS_MODULE, + .type = NVMEM_TYPE_EEPROM, + .reg_read = ds1682_nvmem_read, + .reg_write = ds1682_nvmem_write, + .size = DS1682_EEPROM_SIZE, + .priv = client, + }; + struct nvmem_device *nvmem; int rc; if (!i2c_check_functionality(client->adapter, @@ -211,6 +244,10 @@ static int ds1682_probe(struct i2c_client *client) goto exit; } + nvmem = devm_nvmem_register(&client->dev, &config); + if (IS_ENABLED(CONFIG_NVMEM) && IS_ERR(nvmem)) + return PTR_ERR(nvmem); + rc = sysfs_create_group(&client->dev.kobj, &ds1682_group); if (rc) goto exit; diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index f9bcff19761512..99393f610cdf6d 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -1327,7 +1327,7 @@ static int mei_cl_device_uevent(const struct device *dev, struct kobj_uevent_env return 0; } -static struct bus_type mei_cl_bus_type = { +static const struct bus_type mei_cl_bus_type = { .name = "mei", .dev_groups = mei_cldev_groups, .match = mei_cl_device_match, diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h index eb800a07a84bdd..2e9cf6f4efb6e7 100644 --- a/drivers/misc/mei/hw.h +++ b/drivers/misc/mei/hw.h @@ -247,12 +247,10 @@ enum mei_ext_hdr_type { * struct mei_ext_hdr - extend header descriptor (TLV) * @type: enum mei_ext_hdr_type * @length: length excluding descriptor - * @data: the extended header payload */ struct mei_ext_hdr { u8 type; u8 length; - u8 data[]; } __packed; /** diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c new file mode 100644 index 00000000000000..3c2f743c58b00c --- /dev/null +++ b/drivers/misc/ntsync.c @@ -0,0 +1,249 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ntsync.c - Kernel driver for NT synchronization primitives + * + * Copyright (C) 2024 Elizabeth Figura <zfigura@codeweavers.com> + */ + +#include <linux/anon_inodes.h> +#include <linux/file.h> +#include <linux/fs.h> +#include <linux/miscdevice.h> +#include <linux/module.h> +#include <linux/overflow.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <uapi/linux/ntsync.h> + +#define NTSYNC_NAME "ntsync" + +enum ntsync_type { + NTSYNC_TYPE_SEM, +}; + +/* + * Individual synchronization primitives are represented by + * struct ntsync_obj, and each primitive is backed by a file. + * + * The whole namespace is represented by a struct ntsync_device also + * backed by a file. + * + * Both rely on struct file for reference counting. Individual + * ntsync_obj objects take a reference to the device when created. + */ + +struct ntsync_obj { + spinlock_t lock; + + enum ntsync_type type; + + struct file *file; + struct ntsync_device *dev; + + /* The following fields are protected by the object lock. */ + union { + struct { + __u32 count; + __u32 max; + } sem; + } u; +}; + +struct ntsync_device { + struct file *file; +}; + +/* + * Actually change the semaphore state, returning -EOVERFLOW if it is made + * invalid. + */ +static int post_sem_state(struct ntsync_obj *sem, __u32 count) +{ + __u32 sum; + + lockdep_assert_held(&sem->lock); + + if (check_add_overflow(sem->u.sem.count, count, &sum) || + sum > sem->u.sem.max) + return -EOVERFLOW; + + sem->u.sem.count = sum; + return 0; +} + +static int ntsync_sem_post(struct ntsync_obj *sem, void __user *argp) +{ + __u32 __user *user_args = argp; + __u32 prev_count; + __u32 args; + int ret; + + if (copy_from_user(&args, argp, sizeof(args))) + return -EFAULT; + + if (sem->type != NTSYNC_TYPE_SEM) + return -EINVAL; + + spin_lock(&sem->lock); + + prev_count = sem->u.sem.count; + ret = post_sem_state(sem, args); + + spin_unlock(&sem->lock); + + if (!ret && put_user(prev_count, user_args)) + ret = -EFAULT; + + return ret; +} + +static int ntsync_obj_release(struct inode *inode, struct file *file) +{ + struct ntsync_obj *obj = file->private_data; + + fput(obj->dev->file); + kfree(obj); + + return 0; +} + +static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, + unsigned long parm) +{ + struct ntsync_obj *obj = file->private_data; + void __user *argp = (void __user *)parm; + + switch (cmd) { + case NTSYNC_IOC_SEM_POST: + return ntsync_sem_post(obj, argp); + default: + return -ENOIOCTLCMD; + } +} + +static const struct file_operations ntsync_obj_fops = { + .owner = THIS_MODULE, + .release = ntsync_obj_release, + .unlocked_ioctl = ntsync_obj_ioctl, + .compat_ioctl = compat_ptr_ioctl, + .llseek = no_llseek, +}; + +static struct ntsync_obj *ntsync_alloc_obj(struct ntsync_device *dev, + enum ntsync_type type) +{ + struct ntsync_obj *obj; + + obj = kzalloc(sizeof(*obj), GFP_KERNEL); + if (!obj) + return NULL; + obj->type = type; + obj->dev = dev; + get_file(dev->file); + spin_lock_init(&obj->lock); + + return obj; +} + +static int ntsync_obj_get_fd(struct ntsync_obj *obj) +{ + struct file *file; + int fd; + + fd = get_unused_fd_flags(O_CLOEXEC); + if (fd < 0) + return fd; + file = anon_inode_getfile("ntsync", &ntsync_obj_fops, obj, O_RDWR); + if (IS_ERR(file)) { + put_unused_fd(fd); + return PTR_ERR(file); + } + obj->file = file; + fd_install(fd, file); + + return fd; +} + +static int ntsync_create_sem(struct ntsync_device *dev, void __user *argp) +{ + struct ntsync_sem_args __user *user_args = argp; + struct ntsync_sem_args args; + struct ntsync_obj *sem; + int fd; + + if (copy_from_user(&args, argp, sizeof(args))) + return -EFAULT; + + if (args.count > args.max) + return -EINVAL; + + sem = ntsync_alloc_obj(dev, NTSYNC_TYPE_SEM); + if (!sem) + return -ENOMEM; + sem->u.sem.count = args.count; + sem->u.sem.max = args.max; + fd = ntsync_obj_get_fd(sem); + if (fd < 0) { + kfree(sem); + return fd; + } + + return put_user(fd, &user_args->sem); +} + +static int ntsync_char_open(struct inode *inode, struct file *file) +{ + struct ntsync_device *dev; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + + file->private_data = dev; + dev->file = file; + return nonseekable_open(inode, file); +} + +static int ntsync_char_release(struct inode *inode, struct file *file) +{ + struct ntsync_device *dev = file->private_data; + + kfree(dev); + + return 0; +} + +static long ntsync_char_ioctl(struct file *file, unsigned int cmd, + unsigned long parm) +{ + struct ntsync_device *dev = file->private_data; + void __user *argp = (void __user *)parm; + + switch (cmd) { + case NTSYNC_IOC_CREATE_SEM: + return ntsync_create_sem(dev, argp); + default: + return -ENOIOCTLCMD; + } +} + +static const struct file_operations ntsync_fops = { + .owner = THIS_MODULE, + .open = ntsync_char_open, + .release = ntsync_char_release, + .unlocked_ioctl = ntsync_char_ioctl, + .compat_ioctl = compat_ptr_ioctl, + .llseek = no_llseek, +}; + +static struct miscdevice ntsync_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = NTSYNC_NAME, + .fops = &ntsync_fops, +}; + +module_misc_device(ntsync_misc); + +MODULE_AUTHOR("Elizabeth Figura <zfigura@codeweavers.com>"); +MODULE_DESCRIPTION("Kernel driver for NT synchronization primitives"); +MODULE_LICENSE("GPL"); diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c index 47ebe80bf84998..c4f963cf96f26d 100644 --- a/drivers/misc/ti-st/st_kim.c +++ b/drivers/misc/ti-st/st_kim.c @@ -563,7 +563,7 @@ long st_kim_stop(void *kim_data) static int version_show(struct seq_file *s, void *unused) { - struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private; + struct kim_data_s *kim_gdata = s->private; seq_printf(s, "%04X %d.%d.%d\n", kim_gdata->version.full, kim_gdata->version.chip, kim_gdata->version.maj_ver, kim_gdata->version.min_ver); @@ -572,7 +572,7 @@ static int version_show(struct seq_file *s, void *unused) static int list_show(struct seq_file *s, void *unused) { - struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private; + struct kim_data_s *kim_gdata = s->private; kim_st_list_protocols(kim_gdata->core_data, s); return 0; } diff --git a/drivers/parport/parport_mfc3.c b/drivers/parport/parport_mfc3.c index f4d0da741e8566..bb1817218d7b22 100644 --- a/drivers/parport/parport_mfc3.c +++ b/drivers/parport/parport_mfc3.c @@ -102,8 +102,7 @@ static unsigned char control_pc_to_mfc3(unsigned char control) ret |= 128; if (control & PARPORT_CONTROL_AUTOFD) /* AUTOLF */ ret &= ~64; - if (control & PARPORT_CONTROL_STROBE) /* Strobe */ - /* Handled directly by hardware */; + /* PARPORT_CONTROL_STROBE handled directly by hardware */ return ret; } diff --git a/drivers/peci/core.c b/drivers/peci/core.c index 0f83a9c6093bc2..8f8bda2f2a62e4 100644 --- a/drivers/peci/core.c +++ b/drivers/peci/core.c @@ -25,7 +25,7 @@ static void peci_controller_dev_release(struct device *dev) kfree(controller); } -struct device_type peci_controller_type = { +const struct device_type peci_controller_type = { .release = peci_controller_dev_release, }; @@ -201,7 +201,7 @@ static void peci_bus_device_remove(struct device *dev) driver->remove(device); } -struct bus_type peci_bus_type = { +const struct bus_type peci_bus_type = { .name = "peci", .match = peci_bus_device_match, .probe = peci_bus_device_probe, diff --git a/drivers/peci/device.c b/drivers/peci/device.c index e6b0bffb14f413..ee01f03c29b792 100644 --- a/drivers/peci/device.c +++ b/drivers/peci/device.c @@ -246,7 +246,7 @@ static void peci_device_release(struct device *dev) kfree(device); } -struct device_type peci_device_type = { +const struct device_type peci_device_type = { .groups = peci_device_groups, .release = peci_device_release, }; diff --git a/drivers/peci/internal.h b/drivers/peci/internal.h index 9d75ea54504c36..506bafcccbbf95 100644 --- a/drivers/peci/internal.h +++ b/drivers/peci/internal.h @@ -75,13 +75,13 @@ struct peci_device_id { u8 model; }; -extern struct device_type peci_device_type; +extern const struct device_type peci_device_type; extern const struct attribute_group *peci_device_groups[]; int peci_device_create(struct peci_controller *controller, u8 addr); void peci_device_destroy(struct peci_device *device); -extern struct bus_type peci_bus_type; +extern const struct bus_type peci_bus_type; extern const struct attribute_group *peci_bus_groups[]; /** @@ -129,7 +129,7 @@ void peci_driver_unregister(struct peci_driver *driver); #define module_peci_driver(__peci_driver) \ module_driver(__peci_driver, peci_driver_register, peci_driver_unregister) -extern struct device_type peci_controller_type; +extern const struct device_type peci_controller_type; int peci_controller_scan_devices(struct peci_controller *controller); diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig index 2e16c5338e5b14..b060dcd7c63501 100644 --- a/drivers/uio/Kconfig +++ b/drivers/uio/Kconfig @@ -125,24 +125,6 @@ config UIO_FSL_ELBC_GPCM_NETX5152 Information about this hardware can be found at: http://www.hilscher.com/netx -config UIO_PRUSS - tristate "Texas Instruments PRUSS driver" - select GENERIC_ALLOCATOR - depends on HAS_IOMEM && HAS_DMA - help - PRUSS driver for OMAPL138/DA850/AM18XX devices - PRUSS driver requires user space components, examples and user space - driver is available from below SVN repo - you may use anonymous login - - https://gforge.ti.com/gf/project/pru_sw/ - - More info on API is available at below wiki - - http://processors.wiki.ti.com/index.php/PRU_Linux_Application_Loader - - To compile this driver as a module, choose M here: the module - will be called uio_pruss. - config UIO_MF624 tristate "Humusoft MF624 DAQ PCI card driver" depends on PCI diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile index f2f416a142286b..1c5f3b5a95cf5b 100644 --- a/drivers/uio/Makefile +++ b/drivers/uio/Makefile @@ -7,7 +7,6 @@ obj-$(CONFIG_UIO_AEC) += uio_aec.o obj-$(CONFIG_UIO_SERCOS3) += uio_sercos3.o obj-$(CONFIG_UIO_PCI_GENERIC) += uio_pci_generic.o obj-$(CONFIG_UIO_NETX) += uio_netx.o -obj-$(CONFIG_UIO_PRUSS) += uio_pruss.o obj-$(CONFIG_UIO_MF624) += uio_mf624.o obj-$(CONFIG_UIO_FSL_ELBC_GPCM) += uio_fsl_elbc_gpcm.o obj-$(CONFIG_UIO_HV_GENERIC) += uio_hv_generic.o diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 009158fef2a8f1..5ce429286ab047 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -438,22 +438,36 @@ void uio_event_notify(struct uio_info *info) EXPORT_SYMBOL_GPL(uio_event_notify); /** - * uio_interrupt - hardware interrupt handler + * uio_interrupt_handler - hardware interrupt handler * @irq: IRQ number, can be UIO_IRQ_CYCLIC for cyclic timer * @dev_id: Pointer to the devices uio_device structure */ -static irqreturn_t uio_interrupt(int irq, void *dev_id) +static irqreturn_t uio_interrupt_handler(int irq, void *dev_id) { struct uio_device *idev = (struct uio_device *)dev_id; irqreturn_t ret; ret = idev->info->handler(irq, idev->info); if (ret == IRQ_HANDLED) - uio_event_notify(idev->info); + ret = IRQ_WAKE_THREAD; return ret; } +/** + * uio_interrupt_thread - irq thread handler + * @irq: IRQ number + * @dev_id: Pointer to the devices uio_device structure + */ +static irqreturn_t uio_interrupt_thread(int irq, void *dev_id) +{ + struct uio_device *idev = (struct uio_device *)dev_id; + + uio_event_notify(idev->info); + + return IRQ_HANDLED; +} + struct uio_listener { struct uio_device *dev; s32 event_count; @@ -1024,8 +1038,8 @@ int __uio_register_device(struct module *owner, * FDs at the time of unregister and therefore may not be * freed until they are released. */ - ret = request_irq(info->irq, uio_interrupt, - info->irq_flags, info->name, idev); + ret = request_threaded_irq(info->irq, uio_interrupt_handler, uio_interrupt_thread, + info->irq_flags, info->name, idev); if (ret) { info->uio_dev = NULL; goto err_request_irq; diff --git a/drivers/uio/uio_fsl_elbc_gpcm.c b/drivers/uio/uio_fsl_elbc_gpcm.c index 82dda799f327d8..496caff66e7ea1 100644 --- a/drivers/uio/uio_fsl_elbc_gpcm.c +++ b/drivers/uio/uio_fsl_elbc_gpcm.c @@ -427,7 +427,7 @@ out_err2: return ret; } -static int uio_fsl_elbc_gpcm_remove(struct platform_device *pdev) +static void uio_fsl_elbc_gpcm_remove(struct platform_device *pdev) { struct uio_info *info = platform_get_drvdata(pdev); struct fsl_elbc_gpcm *priv = info->priv; @@ -438,8 +438,6 @@ static int uio_fsl_elbc_gpcm_remove(struct platform_device *pdev) priv->shutdown(info, false); iounmap(info->mem[0].internal_addr); - return 0; - } static const struct of_device_id uio_fsl_elbc_gpcm_match[] = { @@ -455,7 +453,7 @@ static struct platform_driver uio_fsl_elbc_gpcm_driver = { .dev_groups = uio_fsl_elbc_gpcm_groups, }, .probe = uio_fsl_elbc_gpcm_probe, - .remove = uio_fsl_elbc_gpcm_remove, + .remove_new = uio_fsl_elbc_gpcm_remove, }; module_platform_driver(uio_fsl_elbc_gpcm_driver); diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index 6be3462b109ff2..b45653752301df 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -36,7 +36,6 @@ #define DRIVER_AUTHOR "Stephen Hemminger <sthemmin at microsoft.com>" #define DRIVER_DESC "Generic UIO driver for VMBus devices" -#define HV_RING_SIZE 512 /* pages */ #define SEND_BUFFER_SIZE (16 * 1024 * 1024) #define RECV_BUFFER_SIZE (31 * 1024 * 1024) @@ -84,6 +83,9 @@ hv_uio_irqcontrol(struct uio_info *info, s32 irq_state) dev->channel->inbound.ring_buffer->interrupt_mask = !irq_state; virt_mb(); + if (!dev->channel->offermsg.monitor_allocated && irq_state) + vmbus_setevent(dev->channel); + return 0; } @@ -143,7 +145,7 @@ static const struct bin_attribute ring_buffer_bin_attr = { .name = "ring", .mode = 0600, }, - .size = 2 * HV_RING_SIZE * PAGE_SIZE, + .size = 2 * SZ_2M, .mmap = hv_uio_ring_mmap, }; @@ -153,7 +155,7 @@ hv_uio_new_channel(struct vmbus_channel *new_sc) { struct hv_device *hv_dev = new_sc->primary_channel->device_obj; struct device *device = &hv_dev->device; - const size_t ring_bytes = HV_RING_SIZE * PAGE_SIZE; + const size_t ring_bytes = SZ_2M; int ret; /* Create host communication ring */ @@ -240,19 +242,16 @@ hv_uio_probe(struct hv_device *dev, struct hv_uio_private_data *pdata; void *ring_buffer; int ret; + size_t ring_size = hv_dev_ring_size(channel); - /* Communicating with host has to be via shared memory not hypercall */ - if (!channel->offermsg.monitor_allocated) { - dev_err(&dev->device, "vmbus channel requires hypercall\n"); - return -ENOTSUPP; - } + if (!ring_size) + ring_size = SZ_2M; pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; - ret = vmbus_alloc_ring(channel, HV_RING_SIZE * PAGE_SIZE, - HV_RING_SIZE * PAGE_SIZE); + ret = vmbus_alloc_ring(channel, ring_size, ring_size); if (ret) return ret; diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c index 63258b6accc468..796f5be0a086a5 100644 --- a/drivers/uio/uio_pdrv_genirq.c +++ b/drivers/uio/uio_pdrv_genirq.c @@ -23,8 +23,8 @@ #include <linux/irq.h> #include <linux/of.h> -#include <linux/of_platform.h> -#include <linux/of_address.h> +#include <linux/mod_devicetable.h> +#include <linux/property.h> #define DRIVER_NAME "uio_pdrv_genirq" @@ -110,7 +110,7 @@ static void uio_pdrv_genirq_cleanup(void *data) static int uio_pdrv_genirq_probe(struct platform_device *pdev) { struct uio_info *uioinfo = dev_get_platdata(&pdev->dev); - struct device_node *node = pdev->dev.of_node; + struct fwnode_handle *node = dev_fwnode(&pdev->dev); struct uio_pdrv_genirq_platdata *priv; struct uio_mem *uiomem; int ret = -EINVAL; @@ -127,11 +127,11 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev) return -ENOMEM; } - if (!of_property_read_string(node, "linux,uio-name", &name)) + if (!device_property_read_string(&pdev->dev, "linux,uio-name", &name)) uioinfo->name = devm_kstrdup(&pdev->dev, name, GFP_KERNEL); else uioinfo->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, - "%pOFn", node); + "%pfwP", node); uioinfo->version = "devicetree"; /* Multiple IRQs are not supported */ diff --git a/drivers/uio/uio_pruss.c b/drivers/uio/uio_pruss.c deleted file mode 100644 index f67881cba645ba..00000000000000 --- a/drivers/uio/uio_pruss.c +++ /dev/null @@ -1,255 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Programmable Real-Time Unit Sub System (PRUSS) UIO driver (uio_pruss) - * - * This driver exports PRUSS host event out interrupts and PRUSS, L3 RAM, - * and DDR RAM to user space for applications interacting with PRUSS firmware - * - * Copyright (C) 2010-11 Texas Instruments Incorporated - http://www.ti.com/ - */ -#include <linux/device.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/platform_device.h> -#include <linux/uio_driver.h> -#include <linux/platform_data/uio_pruss.h> -#include <linux/io.h> -#include <linux/clk.h> -#include <linux/dma-mapping.h> -#include <linux/sizes.h> -#include <linux/slab.h> -#include <linux/genalloc.h> - -#define DRV_NAME "pruss_uio" -#define DRV_VERSION "1.0" - -static int sram_pool_sz = SZ_16K; -module_param(sram_pool_sz, int, 0); -MODULE_PARM_DESC(sram_pool_sz, "sram pool size to allocate "); - -static int extram_pool_sz = SZ_256K; -module_param(extram_pool_sz, int, 0); -MODULE_PARM_DESC(extram_pool_sz, "external ram pool size to allocate"); - -/* - * Host event IRQ numbers from PRUSS - PRUSS can generate up to 8 interrupt - * events to AINTC of ARM host processor - which can be used for IPC b/w PRUSS - * firmware and user space application, async notification from PRU firmware - * to user space application - * 3 PRU_EVTOUT0 - * 4 PRU_EVTOUT1 - * 5 PRU_EVTOUT2 - * 6 PRU_EVTOUT3 - * 7 PRU_EVTOUT4 - * 8 PRU_EVTOUT5 - * 9 PRU_EVTOUT6 - * 10 PRU_EVTOUT7 -*/ -#define MAX_PRUSS_EVT 8 - -#define PINTC_HIDISR 0x0038 -#define PINTC_HIPIR 0x0900 -#define HIPIR_NOPEND 0x80000000 -#define PINTC_HIER 0x1500 - -struct uio_pruss_dev { - struct uio_info *info; - struct clk *pruss_clk; - dma_addr_t sram_paddr; - dma_addr_t ddr_paddr; - void __iomem *prussio_vaddr; - unsigned long sram_vaddr; - void *ddr_vaddr; - unsigned int hostirq_start; - unsigned int pintc_base; - struct gen_pool *sram_pool; -}; - -static irqreturn_t pruss_handler(int irq, struct uio_info *info) -{ - struct uio_pruss_dev *gdev = info->priv; - int intr_bit = (irq - gdev->hostirq_start + 2); - int val, intr_mask = (1 << intr_bit); - void __iomem *base = gdev->prussio_vaddr + gdev->pintc_base; - void __iomem *intren_reg = base + PINTC_HIER; - void __iomem *intrdis_reg = base + PINTC_HIDISR; - void __iomem *intrstat_reg = base + PINTC_HIPIR + (intr_bit << 2); - - val = ioread32(intren_reg); - /* Is interrupt enabled and active ? */ - if (!(val & intr_mask) && (ioread32(intrstat_reg) & HIPIR_NOPEND)) - return IRQ_NONE; - /* Disable interrupt */ - iowrite32(intr_bit, intrdis_reg); - return IRQ_HANDLED; -} - -static void pruss_cleanup(struct device *dev, struct uio_pruss_dev *gdev) -{ - int cnt; - struct uio_info *p = gdev->info; - - for (cnt = 0; cnt < MAX_PRUSS_EVT; cnt++, p++) { - uio_unregister_device(p); - } - iounmap(gdev->prussio_vaddr); - if (gdev->ddr_vaddr) { - dma_free_coherent(dev, extram_pool_sz, gdev->ddr_vaddr, - gdev->ddr_paddr); - } - if (gdev->sram_vaddr) - gen_pool_free(gdev->sram_pool, - gdev->sram_vaddr, - sram_pool_sz); - clk_disable(gdev->pruss_clk); -} - -static int pruss_probe(struct platform_device *pdev) -{ - struct uio_info *p; - struct uio_pruss_dev *gdev; - struct resource *regs_prussio; - struct device *dev = &pdev->dev; - int ret, cnt, i, len; - struct uio_pruss_pdata *pdata = dev_get_platdata(dev); - - gdev = devm_kzalloc(dev, sizeof(struct uio_pruss_dev), GFP_KERNEL); - if (!gdev) - return -ENOMEM; - - gdev->info = devm_kcalloc(dev, MAX_PRUSS_EVT, sizeof(*p), GFP_KERNEL); - if (!gdev->info) - return -ENOMEM; - - /* Power on PRU in case its not done as part of boot-loader */ - gdev->pruss_clk = devm_clk_get(dev, "pruss"); - if (IS_ERR(gdev->pruss_clk)) { - dev_err(dev, "Failed to get clock\n"); - return PTR_ERR(gdev->pruss_clk); - } - - ret = clk_enable(gdev->pruss_clk); - if (ret) { - dev_err(dev, "Failed to enable clock\n"); - return ret; - } - - regs_prussio = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!regs_prussio) { - dev_err(dev, "No PRUSS I/O resource specified\n"); - ret = -EIO; - goto err_clk_disable; - } - - if (!regs_prussio->start) { - dev_err(dev, "Invalid memory resource\n"); - ret = -EIO; - goto err_clk_disable; - } - - if (pdata->sram_pool) { - gdev->sram_pool = pdata->sram_pool; - gdev->sram_vaddr = - (unsigned long)gen_pool_dma_alloc(gdev->sram_pool, - sram_pool_sz, &gdev->sram_paddr); - if (!gdev->sram_vaddr) { - dev_err(dev, "Could not allocate SRAM pool\n"); - ret = -ENOMEM; - goto err_clk_disable; - } - } - - gdev->ddr_vaddr = dma_alloc_coherent(dev, extram_pool_sz, - &(gdev->ddr_paddr), GFP_KERNEL | GFP_DMA); - if (!gdev->ddr_vaddr) { - dev_err(dev, "Could not allocate external memory\n"); - ret = -ENOMEM; - goto err_free_sram; - } - - len = resource_size(regs_prussio); - gdev->prussio_vaddr = ioremap(regs_prussio->start, len); - if (!gdev->prussio_vaddr) { - dev_err(dev, "Can't remap PRUSS I/O address range\n"); - ret = -ENOMEM; - goto err_free_ddr_vaddr; - } - - ret = platform_get_irq(pdev, 0); - if (ret < 0) - goto err_unmap; - - gdev->hostirq_start = ret; - gdev->pintc_base = pdata->pintc_base; - - for (cnt = 0, p = gdev->info; cnt < MAX_PRUSS_EVT; cnt++, p++) { - p->mem[0].addr = regs_prussio->start; - p->mem[0].size = resource_size(regs_prussio); - p->mem[0].memtype = UIO_MEM_PHYS; - - p->mem[1].addr = gdev->sram_paddr; - p->mem[1].size = sram_pool_sz; - p->mem[1].memtype = UIO_MEM_PHYS; - - p->mem[2].addr = (uintptr_t) gdev->ddr_vaddr; - p->mem[2].dma_addr = gdev->ddr_paddr; - p->mem[2].size = extram_pool_sz; - p->mem[2].memtype = UIO_MEM_DMA_COHERENT; - p->mem[2].dma_device = dev; - - p->name = devm_kasprintf(dev, GFP_KERNEL, "pruss_evt%d", cnt); - p->version = DRV_VERSION; - - /* Register PRUSS IRQ lines */ - p->irq = gdev->hostirq_start + cnt; - p->handler = pruss_handler; - p->priv = gdev; - - ret = uio_register_device(dev, p); - if (ret < 0) - goto err_unloop; - } - - platform_set_drvdata(pdev, gdev); - return 0; - -err_unloop: - for (i = 0, p = gdev->info; i < cnt; i++, p++) { - uio_unregister_device(p); - } -err_unmap: - iounmap(gdev->prussio_vaddr); -err_free_ddr_vaddr: - dma_free_coherent(dev, extram_pool_sz, gdev->ddr_vaddr, - gdev->ddr_paddr); -err_free_sram: - if (pdata->sram_pool) - gen_pool_free(gdev->sram_pool, gdev->sram_vaddr, sram_pool_sz); -err_clk_disable: - clk_disable(gdev->pruss_clk); - - return ret; -} - -static int pruss_remove(struct platform_device *dev) -{ - struct uio_pruss_dev *gdev = platform_get_drvdata(dev); - - pruss_cleanup(&dev->dev, gdev); - return 0; -} - -static struct platform_driver pruss_driver = { - .probe = pruss_probe, - .remove = pruss_remove, - .driver = { - .name = DRV_NAME, - }, -}; - -module_platform_driver(pruss_driver); - -MODULE_LICENSE("GPL v2"); -MODULE_VERSION(DRV_VERSION); -MODULE_AUTHOR("Amit Chatterjee <amit.chatterjee@ti.com>"); -MODULE_AUTHOR("Pratheesh Gangadhar <pratheesh@ti.com>"); diff --git a/include/linux/counter.h b/include/linux/counter.h index 702e9108bbb44e..cd35d8574ee219 100644 --- a/include/linux/counter.h +++ b/include/linux/counter.h @@ -359,7 +359,6 @@ struct counter_ops { * @num_counts: number of Counts specified in @counts * @ext: optional array of Counter device extensions * @num_ext: number of Counter device extensions specified in @ext - * @priv: optional private data supplied by driver * @dev: internal device structure * @chrdev: internal character device structure * @events_list: list of current watching Counter events @@ -602,6 +601,9 @@ struct counter_array { #define COUNTER_COMP_FLOOR(_read, _write) \ COUNTER_COMP_COUNT_U64("floor", _read, _write) +#define COUNTER_COMP_FREQUENCY(_read) \ + COUNTER_COMP_SIGNAL_U64("frequency", _read, NULL) + #define COUNTER_COMP_POLARITY(_read, _write, _available) \ { \ .type = COUNTER_COMP_SIGNAL_POLARITY, \ diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 96ceb4095425eb..5e39baa7f6cbb6 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -820,6 +820,8 @@ struct vmbus_requestor { #define VMBUS_RQST_RESET (U64_MAX - 3) struct vmbus_device { + /* preferred ring buffer size in KB, 0 means no preferred size for this device */ + size_t pref_ring_size; u16 dev_type; guid_t guid; bool perf_device; diff --git a/include/linux/iio/adc/ad_sigma_delta.h b/include/linux/iio/adc/ad_sigma_delta.h index 719cf9cc6e1ac4..383614ebd760fb 100644 --- a/include/linux/iio/adc/ad_sigma_delta.h +++ b/include/linux/iio/adc/ad_sigma_delta.h @@ -48,6 +48,7 @@ struct iio_dev; * be used. * @irq_flags: flags for the interrupt used by the triggered buffer * @num_slots: Number of sequencer slots + * @irq_line: IRQ for reading conversions. If 0, spi->irq will be used */ struct ad_sigma_delta_info { int (*set_channel)(struct ad_sigma_delta *, unsigned int channel); @@ -62,6 +63,7 @@ struct ad_sigma_delta_info { unsigned int data_reg; unsigned long irq_flags; unsigned int num_slots; + int irq_line; }; /** @@ -89,6 +91,7 @@ struct ad_sigma_delta { unsigned int active_slots; unsigned int current_slot; unsigned int num_slots; + int irq_line; bool status_appended; /* map slots to channels in order to know what to expect from devices */ unsigned int *slots; diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index a6d79381866ece..9d144631134db0 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -4,6 +4,7 @@ #include <linux/types.h> +struct iio_chan_spec; struct fwnode_handle; struct iio_backend; struct device; @@ -15,6 +16,26 @@ enum iio_backend_data_type { IIO_BACKEND_DATA_TYPE_MAX }; +enum iio_backend_data_source { + IIO_BACKEND_INTERNAL_CONTINUOS_WAVE, + IIO_BACKEND_EXTERNAL, + IIO_BACKEND_DATA_SOURCE_MAX +}; + +/** + * IIO_BACKEND_EX_INFO - Helper for an IIO extended channel attribute + * @_name: Attribute name + * @_shared: Whether the attribute is shared between all channels + * @_what: Data private to the driver + */ +#define IIO_BACKEND_EX_INFO(_name, _shared, _what) { \ + .name = (_name), \ + .shared = (_shared), \ + .read = iio_backend_ext_info_get, \ + .write = iio_backend_ext_info_set, \ + .private = (_what), \ +} + /** * struct iio_backend_data_fmt - Backend data format * @type: Data type. @@ -35,8 +56,13 @@ struct iio_backend_data_fmt { * @chan_enable: Enable one channel. * @chan_disable: Disable one channel. * @data_format_set: Configure the data format for a specific channel. + * @data_source_set: Configure the data source for a specific channel. + * @set_sample_rate: Configure the sampling rate for a specific channel. * @request_buffer: Request an IIO buffer. * @free_buffer: Free an IIO buffer. + * @extend_chan_spec: Extend an IIO channel. + * @ext_info_set: Extended info setter. + * @ext_info_get: Extended info getter. **/ struct iio_backend_ops { int (*enable)(struct iio_backend *back); @@ -45,10 +71,21 @@ struct iio_backend_ops { int (*chan_disable)(struct iio_backend *back, unsigned int chan); int (*data_format_set)(struct iio_backend *back, unsigned int chan, const struct iio_backend_data_fmt *data); + int (*data_source_set)(struct iio_backend *back, unsigned int chan, + enum iio_backend_data_source data); + int (*set_sample_rate)(struct iio_backend *back, unsigned int chan, + u64 sample_rate_hz); struct iio_buffer *(*request_buffer)(struct iio_backend *back, struct iio_dev *indio_dev); void (*free_buffer)(struct iio_backend *back, struct iio_buffer *buffer); + int (*extend_chan_spec)(struct iio_backend *back, + struct iio_chan_spec *chan); + int (*ext_info_set)(struct iio_backend *back, uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len); + int (*ext_info_get)(struct iio_backend *back, uintptr_t private, + const struct iio_chan_spec *chan, char *buf); }; int iio_backend_chan_enable(struct iio_backend *back, unsigned int chan); @@ -56,10 +93,22 @@ int iio_backend_chan_disable(struct iio_backend *back, unsigned int chan); int devm_iio_backend_enable(struct device *dev, struct iio_backend *back); int iio_backend_data_format_set(struct iio_backend *back, unsigned int chan, const struct iio_backend_data_fmt *data); +int iio_backend_data_source_set(struct iio_backend *back, unsigned int chan, + enum iio_backend_data_source data); +int iio_backend_set_sampling_freq(struct iio_backend *back, unsigned int chan, + u64 sample_rate_hz); int devm_iio_backend_request_buffer(struct device *dev, struct iio_backend *back, struct iio_dev *indio_dev); +ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private, + const struct iio_chan_spec *chan, + const char *buf, size_t len); +ssize_t iio_backend_ext_info_get(struct iio_dev *indio_dev, uintptr_t private, + const struct iio_chan_spec *chan, char *buf); +int iio_backend_extend_chan_spec(struct iio_dev *indio_dev, + struct iio_backend *back, + struct iio_chan_spec *chan); void *iio_backend_get_priv(const struct iio_backend *conv); struct iio_backend *devm_iio_backend_get(struct device *dev, const char *name); struct iio_backend * diff --git a/include/linux/iio/buffer-dma.h b/include/linux/iio/buffer-dma.h index 18d3702fa95d13..6e27e47077d567 100644 --- a/include/linux/iio/buffer-dma.h +++ b/include/linux/iio/buffer-dma.h @@ -132,7 +132,9 @@ int iio_dma_buffer_disable(struct iio_buffer *buffer, struct iio_dev *indio_dev); int iio_dma_buffer_read(struct iio_buffer *buffer, size_t n, char __user *user_buffer); -size_t iio_dma_buffer_data_available(struct iio_buffer *buffer); +int iio_dma_buffer_write(struct iio_buffer *buffer, size_t n, + const char __user *user_buffer); +size_t iio_dma_buffer_usage(struct iio_buffer *buffer); int iio_dma_buffer_set_bytes_per_datum(struct iio_buffer *buffer, size_t bpd); int iio_dma_buffer_set_length(struct iio_buffer *buffer, unsigned int length); int iio_dma_buffer_request_update(struct iio_buffer *buffer); diff --git a/include/linux/iio/buffer-dmaengine.h b/include/linux/iio/buffer-dmaengine.h index cbb8ba957fade3..81d9a19aeb9199 100644 --- a/include/linux/iio/buffer-dmaengine.h +++ b/include/linux/iio/buffer-dmaengine.h @@ -7,14 +7,28 @@ #ifndef __IIO_DMAENGINE_H__ #define __IIO_DMAENGINE_H__ +#include <linux/iio/buffer.h> + struct iio_dev; struct device; -struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev, - const char *channel); void iio_dmaengine_buffer_free(struct iio_buffer *buffer); -int devm_iio_dmaengine_buffer_setup(struct device *dev, - struct iio_dev *indio_dev, - const char *channel); +struct iio_buffer *iio_dmaengine_buffer_setup_ext(struct device *dev, + struct iio_dev *indio_dev, + const char *channel, + enum iio_buffer_direction dir); + +#define iio_dmaengine_buffer_setup(dev, indio_dev, channel) \ + iio_dmaengine_buffer_setup_ext(dev, indio_dev, channel, \ + IIO_BUFFER_DIRECTION_IN) + +int devm_iio_dmaengine_buffer_setup_ext(struct device *dev, + struct iio_dev *indio_dev, + const char *channel, + enum iio_buffer_direction dir); + +#define devm_iio_dmaengine_buffer_setup(dev, indio_dev, channel) \ + devm_iio_dmaengine_buffer_setup_ext(dev, indio_dev, channel, \ + IIO_BUFFER_DIRECTION_IN) #endif diff --git a/include/linux/mfd/stm32-timers.h b/include/linux/mfd/stm32-timers.h index ca35af30745f7f..9eb17481b07fac 100644 --- a/include/linux/mfd/stm32-timers.h +++ b/include/linux/mfd/stm32-timers.h @@ -41,6 +41,11 @@ #define TIM_SMCR_SMS (BIT(0) | BIT(1) | BIT(2)) /* Slave mode selection */ #define TIM_SMCR_TS (BIT(4) | BIT(5) | BIT(6)) /* Trigger selection */ #define TIM_DIER_UIE BIT(0) /* Update interrupt */ +#define TIM_DIER_CC1IE BIT(1) /* CC1 Interrupt Enable */ +#define TIM_DIER_CC2IE BIT(2) /* CC2 Interrupt Enable */ +#define TIM_DIER_CC3IE BIT(3) /* CC3 Interrupt Enable */ +#define TIM_DIER_CC4IE BIT(4) /* CC4 Interrupt Enable */ +#define TIM_DIER_CC_IE(x) BIT((x) + 1) /* CC1, CC2, CC3, CC4 interrupt enable */ #define TIM_DIER_UDE BIT(8) /* Update DMA request Enable */ #define TIM_DIER_CC1DE BIT(9) /* CC1 DMA request Enable */ #define TIM_DIER_CC2DE BIT(10) /* CC2 DMA request Enable */ @@ -49,6 +54,7 @@ #define TIM_DIER_COMDE BIT(13) /* COM DMA request Enable */ #define TIM_DIER_TDE BIT(14) /* Trigger DMA request Enable */ #define TIM_SR_UIF BIT(0) /* Update interrupt flag */ +#define TIM_SR_CC_IF(x) BIT((x) + 1) /* CC1, CC2, CC3, CC4 interrupt flag */ #define TIM_EGR_UG BIT(0) /* Update Generation */ #define TIM_CCMR_PE BIT(3) /* Channel Preload Enable */ #define TIM_CCMR_M1 (BIT(6) | BIT(5)) /* Channel PWM Mode 1 */ @@ -60,16 +66,23 @@ #define TIM_CCMR_CC1S_TI2 BIT(1) /* IC1/IC3 selects TI2/TI4 */ #define TIM_CCMR_CC2S_TI2 BIT(8) /* IC2/IC4 selects TI2/TI4 */ #define TIM_CCMR_CC2S_TI1 BIT(9) /* IC2/IC4 selects TI1/TI3 */ +#define TIM_CCMR_CC3S (BIT(0) | BIT(1)) /* Capture/compare 3 sel */ +#define TIM_CCMR_CC4S (BIT(8) | BIT(9)) /* Capture/compare 4 sel */ +#define TIM_CCMR_CC3S_TI3 BIT(0) /* IC3 selects TI3 */ +#define TIM_CCMR_CC4S_TI4 BIT(8) /* IC4 selects TI4 */ #define TIM_CCER_CC1E BIT(0) /* Capt/Comp 1 out Ena */ #define TIM_CCER_CC1P BIT(1) /* Capt/Comp 1 Polarity */ #define TIM_CCER_CC1NE BIT(2) /* Capt/Comp 1N out Ena */ #define TIM_CCER_CC1NP BIT(3) /* Capt/Comp 1N Polarity */ #define TIM_CCER_CC2E BIT(4) /* Capt/Comp 2 out Ena */ #define TIM_CCER_CC2P BIT(5) /* Capt/Comp 2 Polarity */ +#define TIM_CCER_CC2NP BIT(7) /* Capt/Comp 2N Polarity */ #define TIM_CCER_CC3E BIT(8) /* Capt/Comp 3 out Ena */ #define TIM_CCER_CC3P BIT(9) /* Capt/Comp 3 Polarity */ +#define TIM_CCER_CC3NP BIT(11) /* Capt/Comp 3N Polarity */ #define TIM_CCER_CC4E BIT(12) /* Capt/Comp 4 out Ena */ #define TIM_CCER_CC4P BIT(13) /* Capt/Comp 4 Polarity */ +#define TIM_CCER_CC4NP BIT(15) /* Capt/Comp 4N Polarity */ #define TIM_CCER_CCXE (BIT(0) | BIT(4) | BIT(8) | BIT(12)) #define TIM_BDTR_BKE(x) BIT(12 + (x) * 12) /* Break input enable */ #define TIM_BDTR_BKP(x) BIT(13 + (x) * 12) /* Break input polarity */ diff --git a/include/linux/platform_data/uio_pruss.h b/include/linux/platform_data/uio_pruss.h deleted file mode 100644 index f76fa393b8023c..00000000000000 --- a/include/linux/platform_data/uio_pruss.h +++ /dev/null @@ -1,18 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * include/linux/platform_data/uio_pruss.h - * - * Platform data for uio_pruss driver - * - * Copyright (C) 2010-11 Texas Instruments Incorporated - https://www.ti.com/ - */ - -#ifndef _UIO_PRUSS_H_ -#define _UIO_PRUSS_H_ - -/* To configure the PRUSS INTC base offset for UIO driver */ -struct uio_pruss_pdata { - u32 pintc_base; - struct gen_pool *sram_pool; -}; -#endif /* _UIO_PRUSS_H_ */ diff --git a/include/linux/property.h b/include/linux/property.h index 3a1045eb786c4c..61fc20e5f81f8d 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -13,6 +13,7 @@ #include <linux/args.h> #include <linux/array_size.h> #include <linux/bits.h> +#include <linux/cleanup.h> #include <linux/fwnode.h> #include <linux/stddef.h> #include <linux/types.h> @@ -174,13 +175,32 @@ struct fwnode_handle *device_get_next_child_node(const struct device *dev, for (child = device_get_next_child_node(dev, NULL); child; \ child = device_get_next_child_node(dev, child)) +#define device_for_each_child_node_scoped(dev, child) \ + for (struct fwnode_handle *child __free(fwnode_handle) = \ + device_get_next_child_node(dev, NULL); \ + child; child = device_get_next_child_node(dev, child)) + struct fwnode_handle *fwnode_get_named_child_node(const struct fwnode_handle *fwnode, const char *childname); struct fwnode_handle *device_get_named_child_node(const struct device *dev, const char *childname); struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode); -void fwnode_handle_put(struct fwnode_handle *fwnode); + +/** + * fwnode_handle_put - Drop reference to a device node + * @fwnode: Pointer to the device node to drop the reference to. + * + * This has to be used when terminating device_for_each_child_node() iteration + * with break or return to prevent stale device node references from being left + * behind. + */ +static inline void fwnode_handle_put(struct fwnode_handle *fwnode) +{ + fwnode_call_void_op(fwnode, put); +} + +DEFINE_FREE(fwnode_handle, struct fwnode_handle *, fwnode_handle_put(_T)) int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index); int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name); diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h new file mode 100644 index 00000000000000..dcfa38fdc93c61 --- /dev/null +++ b/include/uapi/linux/ntsync.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Kernel support for NT synchronization primitive emulation + * + * Copyright (C) 2021-2022 Elizabeth Figura <zfigura@codeweavers.com> + */ + +#ifndef __LINUX_NTSYNC_H +#define __LINUX_NTSYNC_H + +#include <linux/types.h> + +struct ntsync_sem_args { + __u32 sem; + __u32 count; + __u32 max; +}; + +#define NTSYNC_IOC_CREATE_SEM _IOWR('N', 0x80, struct ntsync_sem_args) + +#define NTSYNC_IOC_SEM_POST _IOWR('N', 0x81, __u32) + +#endif diff --git a/include/uapi/misc/pvpanic.h b/include/uapi/misc/pvpanic.h index 54b7485390d314..3f1745cd1b52ab 100644 --- a/include/uapi/misc/pvpanic.h +++ b/include/uapi/misc/pvpanic.h @@ -3,7 +3,10 @@ #ifndef __PVPANIC_H__ #define __PVPANIC_H__ -#define PVPANIC_PANICKED (1 << 0) -#define PVPANIC_CRASH_LOADED (1 << 1) +#include <linux/const.h> + +#define PVPANIC_PANICKED _BITUL(0) +#define PVPANIC_CRASH_LOADED _BITUL(1) +#define PVPANIC_SHUTDOWN _BITUL(2) #endif /* __PVPANIC_H__ */ diff --git a/tools/hv/Build b/tools/hv/Build index 6cf51fa4b30633..7d1f1698069be2 100644 --- a/tools/hv/Build +++ b/tools/hv/Build @@ -1,3 +1,4 @@ hv_kvp_daemon-y += hv_kvp_daemon.o hv_vss_daemon-y += hv_vss_daemon.o -hv_fcopy_daemon-y += hv_fcopy_daemon.o +hv_fcopy_uio_daemon-y += hv_fcopy_uio_daemon.o +hv_fcopy_uio_daemon-y += vmbus_bufring.o diff --git a/tools/hv/Makefile b/tools/hv/Makefile index fe770e679ae8fe..bb52871da34123 100644 --- a/tools/hv/Makefile +++ b/tools/hv/Makefile @@ -2,6 +2,7 @@ # Makefile for Hyper-V tools include ../scripts/Makefile.include +ARCH := $(shell uname -m 2>/dev/null) sbindir ?= /usr/sbin libexecdir ?= /usr/libexec sharedstatedir ?= /var/lib @@ -17,7 +18,10 @@ MAKEFLAGS += -r override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include -ALL_TARGETS := hv_kvp_daemon hv_vss_daemon hv_fcopy_daemon +ALL_TARGETS := hv_kvp_daemon hv_vss_daemon +ifneq ($(ARCH), aarch64) +ALL_TARGETS += hv_fcopy_uio_daemon +endif ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS)) ALL_SCRIPTS := hv_get_dhcp_info.sh hv_get_dns_info.sh hv_set_ifconfig.sh @@ -39,10 +43,10 @@ $(HV_VSS_DAEMON_IN): FORCE $(OUTPUT)hv_vss_daemon: $(HV_VSS_DAEMON_IN) $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ -HV_FCOPY_DAEMON_IN := $(OUTPUT)hv_fcopy_daemon-in.o -$(HV_FCOPY_DAEMON_IN): FORCE - $(Q)$(MAKE) $(build)=hv_fcopy_daemon -$(OUTPUT)hv_fcopy_daemon: $(HV_FCOPY_DAEMON_IN) +HV_FCOPY_UIO_DAEMON_IN := $(OUTPUT)hv_fcopy_uio_daemon-in.o +$(HV_FCOPY_UIO_DAEMON_IN): FORCE + $(Q)$(MAKE) $(build)=hv_fcopy_uio_daemon +$(OUTPUT)hv_fcopy_uio_daemon: $(HV_FCOPY_UIO_DAEMON_IN) $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ clean: diff --git a/tools/hv/hv_fcopy_daemon.c b/tools/hv/hv_fcopy_daemon.c deleted file mode 100644 index 16d629b22c2542..00000000000000 --- a/tools/hv/hv_fcopy_daemon.c +++ /dev/null @@ -1,266 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * An implementation of host to guest copy functionality for Linux. - * - * Copyright (C) 2014, Microsoft, Inc. - * - * Author : K. Y. Srinivasan <kys@microsoft.com> - */ - - -#include <sys/types.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <errno.h> -#include <linux/hyperv.h> -#include <linux/limits.h> -#include <syslog.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <getopt.h> - -static int target_fd; -static char target_fname[PATH_MAX]; -static unsigned long long filesize; - -static int hv_start_fcopy(struct hv_start_fcopy *smsg) -{ - int error = HV_E_FAIL; - char *q, *p; - - filesize = 0; - p = (char *)smsg->path_name; - snprintf(target_fname, sizeof(target_fname), "%s/%s", - (char *)smsg->path_name, (char *)smsg->file_name); - - syslog(LOG_INFO, "Target file name: %s", target_fname); - /* - * Check to see if the path is already in place; if not, - * create if required. - */ - while ((q = strchr(p, '/')) != NULL) { - if (q == p) { - p++; - continue; - } - *q = '\0'; - if (access((char *)smsg->path_name, F_OK)) { - if (smsg->copy_flags & CREATE_PATH) { - if (mkdir((char *)smsg->path_name, 0755)) { - syslog(LOG_ERR, "Failed to create %s", - (char *)smsg->path_name); - goto done; - } - } else { - syslog(LOG_ERR, "Invalid path: %s", - (char *)smsg->path_name); - goto done; - } - } - p = q + 1; - *q = '/'; - } - - if (!access(target_fname, F_OK)) { - syslog(LOG_INFO, "File: %s exists", target_fname); - if (!(smsg->copy_flags & OVER_WRITE)) { - error = HV_ERROR_ALREADY_EXISTS; - goto done; - } - } - - target_fd = open(target_fname, - O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0744); - if (target_fd == -1) { - syslog(LOG_INFO, "Open Failed: %s", strerror(errno)); - goto done; - } - - error = 0; -done: - if (error) - target_fname[0] = '\0'; - return error; -} - -static int hv_copy_data(struct hv_do_fcopy *cpmsg) -{ - ssize_t bytes_written; - int ret = 0; - - bytes_written = pwrite(target_fd, cpmsg->data, cpmsg->size, - cpmsg->offset); - - filesize += cpmsg->size; - if (bytes_written != cpmsg->size) { - switch (errno) { - case ENOSPC: - ret = HV_ERROR_DISK_FULL; - break; - default: - ret = HV_E_FAIL; - break; - } - syslog(LOG_ERR, "pwrite failed to write %llu bytes: %ld (%s)", - filesize, (long)bytes_written, strerror(errno)); - } - - return ret; -} - -/* - * Reset target_fname to "" in the two below functions for hibernation: if - * the fcopy operation is aborted by hibernation, the daemon should remove the - * partially-copied file; to achieve this, the hv_utils driver always fakes a - * CANCEL_FCOPY message upon suspend, and later when the VM resumes back, - * the daemon calls hv_copy_cancel() to remove the file; if a file is copied - * successfully before suspend, hv_copy_finished() must reset target_fname to - * avoid that the file can be incorrectly removed upon resume, since the faked - * CANCEL_FCOPY message is spurious in this case. - */ -static int hv_copy_finished(void) -{ - close(target_fd); - target_fname[0] = '\0'; - return 0; -} -static int hv_copy_cancel(void) -{ - close(target_fd); - if (strlen(target_fname) > 0) { - unlink(target_fname); - target_fname[0] = '\0'; - } - return 0; - -} - -void print_usage(char *argv[]) -{ - fprintf(stderr, "Usage: %s [options]\n" - "Options are:\n" - " -n, --no-daemon stay in foreground, don't daemonize\n" - " -h, --help print this help\n", argv[0]); -} - -int main(int argc, char *argv[]) -{ - int fcopy_fd = -1; - int error; - int daemonize = 1, long_index = 0, opt; - int version = FCOPY_CURRENT_VERSION; - union { - struct hv_fcopy_hdr hdr; - struct hv_start_fcopy start; - struct hv_do_fcopy copy; - __u32 kernel_modver; - } buffer = { }; - int in_handshake; - - static struct option long_options[] = { - {"help", no_argument, 0, 'h' }, - {"no-daemon", no_argument, 0, 'n' }, - {0, 0, 0, 0 } - }; - - while ((opt = getopt_long(argc, argv, "hn", long_options, - &long_index)) != -1) { - switch (opt) { - case 'n': - daemonize = 0; - break; - case 'h': - default: - print_usage(argv); - exit(EXIT_FAILURE); - } - } - - if (daemonize && daemon(1, 0)) { - syslog(LOG_ERR, "daemon() failed; error: %s", strerror(errno)); - exit(EXIT_FAILURE); - } - - openlog("HV_FCOPY", 0, LOG_USER); - syslog(LOG_INFO, "starting; pid is:%d", getpid()); - -reopen_fcopy_fd: - if (fcopy_fd != -1) - close(fcopy_fd); - /* Remove any possible partially-copied file on error */ - hv_copy_cancel(); - in_handshake = 1; - fcopy_fd = open("/dev/vmbus/hv_fcopy", O_RDWR); - - if (fcopy_fd < 0) { - syslog(LOG_ERR, "open /dev/vmbus/hv_fcopy failed; error: %d %s", - errno, strerror(errno)); - exit(EXIT_FAILURE); - } - - /* - * Register with the kernel. - */ - if ((write(fcopy_fd, &version, sizeof(int))) != sizeof(int)) { - syslog(LOG_ERR, "Registration failed: %s", strerror(errno)); - exit(EXIT_FAILURE); - } - - while (1) { - /* - * In this loop we process fcopy messages after the - * handshake is complete. - */ - ssize_t len; - - len = pread(fcopy_fd, &buffer, sizeof(buffer), 0); - if (len < 0) { - syslog(LOG_ERR, "pread failed: %s", strerror(errno)); - goto reopen_fcopy_fd; - } - - if (in_handshake) { - if (len != sizeof(buffer.kernel_modver)) { - syslog(LOG_ERR, "invalid version negotiation"); - exit(EXIT_FAILURE); - } - in_handshake = 0; - syslog(LOG_INFO, "kernel module version: %u", - buffer.kernel_modver); - continue; - } - - switch (buffer.hdr.operation) { - case START_FILE_COPY: - error = hv_start_fcopy(&buffer.start); - break; - case WRITE_TO_FILE: - error = hv_copy_data(&buffer.copy); - break; - case COMPLETE_FCOPY: - error = hv_copy_finished(); - break; - case CANCEL_FCOPY: - error = hv_copy_cancel(); - break; - - default: - error = HV_E_FAIL; - syslog(LOG_ERR, "Unknown operation: %d", - buffer.hdr.operation); - - } - - /* - * pwrite() may return an error due to the faked CANCEL_FCOPY - * message upon hibernation. Ignore the error by resetting the - * dev file, i.e. closing and re-opening it. - */ - if (pwrite(fcopy_fd, &error, sizeof(int), 0) != sizeof(int)) { - syslog(LOG_ERR, "pwrite failed: %s", strerror(errno)); - goto reopen_fcopy_fd; - } - } -} diff --git a/tools/hv/hv_fcopy_uio_daemon.c b/tools/hv/hv_fcopy_uio_daemon.c new file mode 100644 index 00000000000000..3ce316cc9f970b --- /dev/null +++ b/tools/hv/hv_fcopy_uio_daemon.c @@ -0,0 +1,490 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * An implementation of host to guest copy functionality for Linux. + * + * Copyright (C) 2023, Microsoft, Inc. + * + * Author : K. Y. Srinivasan <kys@microsoft.com> + * Author : Saurabh Sengar <ssengar@microsoft.com> + * + */ + +#include <dirent.h> +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <locale.h> +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <unistd.h> +#include <wchar.h> +#include <sys/stat.h> +#include <linux/hyperv.h> +#include <linux/limits.h> +#include "vmbus_bufring.h" + +#define ICMSGTYPE_NEGOTIATE 0 +#define ICMSGTYPE_FCOPY 7 + +#define WIN8_SRV_MAJOR 1 +#define WIN8_SRV_MINOR 1 +#define WIN8_SRV_VERSION (WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR) + +#define MAX_FOLDER_NAME 15 +#define MAX_PATH_LEN 15 +#define FCOPY_UIO "/sys/bus/vmbus/devices/eb765408-105f-49b6-b4aa-c123b64d17d4/uio" + +#define FCOPY_VER_COUNT 1 +static const int fcopy_versions[] = { + WIN8_SRV_VERSION +}; + +#define FW_VER_COUNT 1 +static const int fw_versions[] = { + UTIL_FW_VERSION +}; + +#define HV_RING_SIZE 0x4000 /* 16KB ring buffer size */ + +unsigned char desc[HV_RING_SIZE]; + +static int target_fd; +static char target_fname[PATH_MAX]; +static unsigned long long filesize; + +static int hv_fcopy_create_file(char *file_name, char *path_name, __u32 flags) +{ + int error = HV_E_FAIL; + char *q, *p; + + filesize = 0; + p = path_name; + snprintf(target_fname, sizeof(target_fname), "%s/%s", + path_name, file_name); + + /* + * Check to see if the path is already in place; if not, + * create if required. + */ + while ((q = strchr(p, '/')) != NULL) { + if (q == p) { + p++; + continue; + } + *q = '\0'; + if (access(path_name, F_OK)) { + if (flags & CREATE_PATH) { + if (mkdir(path_name, 0755)) { + syslog(LOG_ERR, "Failed to create %s", + path_name); + goto done; + } + } else { + syslog(LOG_ERR, "Invalid path: %s", path_name); + goto done; + } + } + p = q + 1; + *q = '/'; + } + + if (!access(target_fname, F_OK)) { + syslog(LOG_INFO, "File: %s exists", target_fname); + if (!(flags & OVER_WRITE)) { + error = HV_ERROR_ALREADY_EXISTS; + goto done; + } + } + + target_fd = open(target_fname, + O_RDWR | O_CREAT | O_TRUNC | O_CLOEXEC, 0744); + if (target_fd == -1) { + syslog(LOG_INFO, "Open Failed: %s", strerror(errno)); + goto done; + } + + error = 0; +done: + if (error) + target_fname[0] = '\0'; + return error; +} + +/* copy the data into the file */ +static int hv_copy_data(struct hv_do_fcopy *cpmsg) +{ + ssize_t len; + int ret = 0; + + len = pwrite(target_fd, cpmsg->data, cpmsg->size, cpmsg->offset); + + filesize += cpmsg->size; + if (len != cpmsg->size) { + switch (errno) { + case ENOSPC: + ret = HV_ERROR_DISK_FULL; + break; + default: + ret = HV_E_FAIL; + break; + } + syslog(LOG_ERR, "pwrite failed to write %llu bytes: %ld (%s)", + filesize, (long)len, strerror(errno)); + } + + return ret; +} + +static int hv_copy_finished(void) +{ + close(target_fd); + target_fname[0] = '\0'; + + return 0; +} + +static void print_usage(char *argv[]) +{ + fprintf(stderr, "Usage: %s [options]\n" + "Options are:\n" + " -n, --no-daemon stay in foreground, don't daemonize\n" + " -h, --help print this help\n", argv[0]); +} + +static bool vmbus_prep_negotiate_resp(struct icmsg_hdr *icmsghdrp, unsigned char *buf, + unsigned int buflen, const int *fw_version, int fw_vercnt, + const int *srv_version, int srv_vercnt, + int *nego_fw_version, int *nego_srv_version) +{ + int icframe_major, icframe_minor; + int icmsg_major, icmsg_minor; + int fw_major, fw_minor; + int srv_major, srv_minor; + int i, j; + bool found_match = false; + struct icmsg_negotiate *negop; + + /* Check that there's enough space for icframe_vercnt, icmsg_vercnt */ + if (buflen < ICMSG_HDR + offsetof(struct icmsg_negotiate, reserved)) { + syslog(LOG_ERR, "Invalid icmsg negotiate"); + return false; + } + + icmsghdrp->icmsgsize = 0x10; + negop = (struct icmsg_negotiate *)&buf[ICMSG_HDR]; + + icframe_major = negop->icframe_vercnt; + icframe_minor = 0; + + icmsg_major = negop->icmsg_vercnt; + icmsg_minor = 0; + + /* Validate negop packet */ + if (icframe_major > IC_VERSION_NEGOTIATION_MAX_VER_COUNT || + icmsg_major > IC_VERSION_NEGOTIATION_MAX_VER_COUNT || + ICMSG_NEGOTIATE_PKT_SIZE(icframe_major, icmsg_major) > buflen) { + syslog(LOG_ERR, "Invalid icmsg negotiate - icframe_major: %u, icmsg_major: %u\n", + icframe_major, icmsg_major); + goto fw_error; + } + + /* + * Select the framework version number we will + * support. + */ + + for (i = 0; i < fw_vercnt; i++) { + fw_major = (fw_version[i] >> 16); + fw_minor = (fw_version[i] & 0xFFFF); + + for (j = 0; j < negop->icframe_vercnt; j++) { + if (negop->icversion_data[j].major == fw_major && + negop->icversion_data[j].minor == fw_minor) { + icframe_major = negop->icversion_data[j].major; + icframe_minor = negop->icversion_data[j].minor; + found_match = true; + break; + } + } + + if (found_match) + break; + } + + if (!found_match) + goto fw_error; + + found_match = false; + + for (i = 0; i < srv_vercnt; i++) { + srv_major = (srv_version[i] >> 16); + srv_minor = (srv_version[i] & 0xFFFF); + + for (j = negop->icframe_vercnt; + (j < negop->icframe_vercnt + negop->icmsg_vercnt); + j++) { + if (negop->icversion_data[j].major == srv_major && + negop->icversion_data[j].minor == srv_minor) { + icmsg_major = negop->icversion_data[j].major; + icmsg_minor = negop->icversion_data[j].minor; + found_match = true; + break; + } + } + + if (found_match) + break; + } + + /* + * Respond with the framework and service + * version numbers we can support. + */ +fw_error: + if (!found_match) { + negop->icframe_vercnt = 0; + negop->icmsg_vercnt = 0; + } else { + negop->icframe_vercnt = 1; + negop->icmsg_vercnt = 1; + } + + if (nego_fw_version) + *nego_fw_version = (icframe_major << 16) | icframe_minor; + + if (nego_srv_version) + *nego_srv_version = (icmsg_major << 16) | icmsg_minor; + + negop->icversion_data[0].major = icframe_major; + negop->icversion_data[0].minor = icframe_minor; + negop->icversion_data[1].major = icmsg_major; + negop->icversion_data[1].minor = icmsg_minor; + + return found_match; +} + +static void wcstoutf8(char *dest, const __u16 *src, size_t dest_size) +{ + size_t len = 0; + + while (len < dest_size) { + if (src[len] < 0x80) + dest[len++] = (char)(*src++); + else + dest[len++] = 'X'; + } + + dest[len] = '\0'; +} + +static int hv_fcopy_start(struct hv_start_fcopy *smsg_in) +{ + setlocale(LC_ALL, "en_US.utf8"); + size_t file_size, path_size; + char *file_name, *path_name; + char *in_file_name = (char *)smsg_in->file_name; + char *in_path_name = (char *)smsg_in->path_name; + + file_size = wcstombs(NULL, (const wchar_t *restrict)in_file_name, 0) + 1; + path_size = wcstombs(NULL, (const wchar_t *restrict)in_path_name, 0) + 1; + + file_name = (char *)malloc(file_size * sizeof(char)); + path_name = (char *)malloc(path_size * sizeof(char)); + + wcstoutf8(file_name, (__u16 *)in_file_name, file_size); + wcstoutf8(path_name, (__u16 *)in_path_name, path_size); + + return hv_fcopy_create_file(file_name, path_name, smsg_in->copy_flags); +} + +static int hv_fcopy_send_data(struct hv_fcopy_hdr *fcopy_msg, int recvlen) +{ + int operation = fcopy_msg->operation; + + /* + * The strings sent from the host are encoded in + * utf16; convert it to utf8 strings. + * The host assures us that the utf16 strings will not exceed + * the max lengths specified. We will however, reserve room + * for the string terminating character - in the utf16s_utf8s() + * function we limit the size of the buffer where the converted + * string is placed to W_MAX_PATH -1 to guarantee + * that the strings can be properly terminated! + */ + + switch (operation) { + case START_FILE_COPY: + return hv_fcopy_start((struct hv_start_fcopy *)fcopy_msg); + case WRITE_TO_FILE: + return hv_copy_data((struct hv_do_fcopy *)fcopy_msg); + case COMPLETE_FCOPY: + return hv_copy_finished(); + } + + return HV_E_FAIL; +} + +/* process the packet recv from host */ +static int fcopy_pkt_process(struct vmbus_br *txbr) +{ + int ret, offset, pktlen; + int fcopy_srv_version; + const struct vmbus_chanpkt_hdr *pkt; + struct hv_fcopy_hdr *fcopy_msg; + struct icmsg_hdr *icmsghdr; + + pkt = (const struct vmbus_chanpkt_hdr *)desc; + offset = pkt->hlen << 3; + pktlen = (pkt->tlen << 3) - offset; + icmsghdr = (struct icmsg_hdr *)&desc[offset + sizeof(struct vmbuspipe_hdr)]; + icmsghdr->status = HV_E_FAIL; + + if (icmsghdr->icmsgtype == ICMSGTYPE_NEGOTIATE) { + if (vmbus_prep_negotiate_resp(icmsghdr, desc + offset, pktlen, fw_versions, + FW_VER_COUNT, fcopy_versions, FCOPY_VER_COUNT, + NULL, &fcopy_srv_version)) { + syslog(LOG_INFO, "FCopy IC version %d.%d", + fcopy_srv_version >> 16, fcopy_srv_version & 0xFFFF); + icmsghdr->status = 0; + } + } else if (icmsghdr->icmsgtype == ICMSGTYPE_FCOPY) { + /* Ensure recvlen is big enough to contain hv_fcopy_hdr */ + if (pktlen < ICMSG_HDR + sizeof(struct hv_fcopy_hdr)) { + syslog(LOG_ERR, "Invalid Fcopy hdr. Packet length too small: %u", + pktlen); + return -ENOBUFS; + } + + fcopy_msg = (struct hv_fcopy_hdr *)&desc[offset + ICMSG_HDR]; + icmsghdr->status = hv_fcopy_send_data(fcopy_msg, pktlen); + } + + icmsghdr->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; + ret = rte_vmbus_chan_send(txbr, 0x6, desc + offset, pktlen, 0); + if (ret) { + syslog(LOG_ERR, "Write to ringbuffer failed err: %d", ret); + return ret; + } + + return 0; +} + +static void fcopy_get_first_folder(char *path, char *chan_no) +{ + DIR *dir = opendir(path); + struct dirent *entry; + + if (!dir) { + syslog(LOG_ERR, "Failed to open directory (errno=%s).\n", strerror(errno)); + return; + } + + while ((entry = readdir(dir)) != NULL) { + if (entry->d_type == DT_DIR && strcmp(entry->d_name, ".") != 0 && + strcmp(entry->d_name, "..") != 0) { + strcpy(chan_no, entry->d_name); + break; + } + } + + closedir(dir); +} + +int main(int argc, char *argv[]) +{ + int fcopy_fd = -1, tmp = 1; + int daemonize = 1, long_index = 0, opt, ret = -EINVAL; + struct vmbus_br txbr, rxbr; + void *ring; + uint32_t len = HV_RING_SIZE; + char uio_name[MAX_FOLDER_NAME] = {0}; + char uio_dev_path[MAX_PATH_LEN] = {0}; + + static struct option long_options[] = { + {"help", no_argument, 0, 'h' }, + {"no-daemon", no_argument, 0, 'n' }, + {0, 0, 0, 0 } + }; + + while ((opt = getopt_long(argc, argv, "hn", long_options, + &long_index)) != -1) { + switch (opt) { + case 'n': + daemonize = 0; + break; + case 'h': + default: + print_usage(argv); + goto exit; + } + } + + if (daemonize && daemon(1, 0)) { + syslog(LOG_ERR, "daemon() failed; error: %s", strerror(errno)); + goto exit; + } + + openlog("HV_UIO_FCOPY", 0, LOG_USER); + syslog(LOG_INFO, "starting; pid is:%d", getpid()); + + fcopy_get_first_folder(FCOPY_UIO, uio_name); + snprintf(uio_dev_path, sizeof(uio_dev_path), "/dev/%s", uio_name); + fcopy_fd = open(uio_dev_path, O_RDWR); + + if (fcopy_fd < 0) { + syslog(LOG_ERR, "open %s failed; error: %d %s", + uio_dev_path, errno, strerror(errno)); + ret = fcopy_fd; + goto exit; + } + + ring = vmbus_uio_map(&fcopy_fd, HV_RING_SIZE); + if (!ring) { + ret = errno; + syslog(LOG_ERR, "mmap ringbuffer failed; error: %d %s", ret, strerror(ret)); + goto close; + } + vmbus_br_setup(&txbr, ring, HV_RING_SIZE); + vmbus_br_setup(&rxbr, (char *)ring + HV_RING_SIZE, HV_RING_SIZE); + + rxbr.vbr->imask = 0; + + while (1) { + /* + * In this loop we process fcopy messages after the + * handshake is complete. + */ + ret = pread(fcopy_fd, &tmp, sizeof(int), 0); + if (ret < 0) { + syslog(LOG_ERR, "pread failed: %s", strerror(errno)); + continue; + } + + len = HV_RING_SIZE; + ret = rte_vmbus_chan_recv_raw(&rxbr, desc, &len); + if (unlikely(ret <= 0)) { + /* This indicates a failure to communicate (or worse) */ + syslog(LOG_ERR, "VMBus channel recv error: %d", ret); + } else { + ret = fcopy_pkt_process(&txbr); + if (ret < 0) + goto close; + + /* Signal host */ + if ((write(fcopy_fd, &tmp, sizeof(int))) != sizeof(int)) { + ret = errno; + syslog(LOG_ERR, "Signal to host failed: %s\n", strerror(ret)); + goto close; + } + } + } +close: + close(fcopy_fd); +exit: + return ret; +} diff --git a/tools/hv/vmbus_bufring.c b/tools/hv/vmbus_bufring.c new file mode 100644 index 00000000000000..bac32c1109df86 --- /dev/null +++ b/tools/hv/vmbus_bufring.c @@ -0,0 +1,318 @@ +// SPDX-License-Identifier: BSD-3-Clause +/* + * Copyright (c) 2009-2012,2016,2023 Microsoft Corp. + * Copyright (c) 2012 NetApp Inc. + * Copyright (c) 2012 Citrix Inc. + * All rights reserved. + */ + +#include <errno.h> +#include <fcntl.h> +#include <emmintrin.h> +#include <linux/limits.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <string.h> +#include <sys/mman.h> +#include <sys/uio.h> +#include <unistd.h> +#include "vmbus_bufring.h" + +/** + * Compiler barrier. + * + * Guarantees that operation reordering does not occur at compile time + * for operations directly before and after the barrier. + */ +#define rte_compiler_barrier() ({ asm volatile ("" : : : "memory"); }) + +#define VMBUS_RQST_ERROR 0xFFFFFFFFFFFFFFFF +#define ALIGN(val, align) ((typeof(val))((val) & (~((typeof(val))((align) - 1))))) + +void *vmbus_uio_map(int *fd, int size) +{ + void *map; + + map = mmap(NULL, 2 * size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0); + if (map == MAP_FAILED) + return NULL; + + return map; +} + +/* Increase bufring index by inc with wraparound */ +static inline uint32_t vmbus_br_idxinc(uint32_t idx, uint32_t inc, uint32_t sz) +{ + idx += inc; + if (idx >= sz) + idx -= sz; + + return idx; +} + +void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen) +{ + br->vbr = buf; + br->windex = br->vbr->windex; + br->dsize = blen - sizeof(struct vmbus_bufring); +} + +static inline __always_inline void +rte_smp_mb(void) +{ + asm volatile("lock addl $0, -128(%%rsp); " ::: "memory"); +} + +static inline int +rte_atomic32_cmpset(volatile uint32_t *dst, uint32_t exp, uint32_t src) +{ + uint8_t res; + + asm volatile("lock ; " + "cmpxchgl %[src], %[dst];" + "sete %[res];" + : [res] "=a" (res), /* output */ + [dst] "=m" (*dst) + : [src] "r" (src), /* input */ + "a" (exp), + "m" (*dst) + : "memory"); /* no-clobber list */ + return res; +} + +static inline uint32_t +vmbus_txbr_copyto(const struct vmbus_br *tbr, uint32_t windex, + const void *src0, uint32_t cplen) +{ + uint8_t *br_data = tbr->vbr->data; + uint32_t br_dsize = tbr->dsize; + const uint8_t *src = src0; + + /* XXX use double mapping like Linux kernel? */ + if (cplen > br_dsize - windex) { + uint32_t fraglen = br_dsize - windex; + + /* Wrap-around detected */ + memcpy(br_data + windex, src, fraglen); + memcpy(br_data, src + fraglen, cplen - fraglen); + } else { + memcpy(br_data + windex, src, cplen); + } + + return vmbus_br_idxinc(windex, cplen, br_dsize); +} + +/* + * Write scattered channel packet to TX bufring. + * + * The offset of this channel packet is written as a 64bits value + * immediately after this channel packet. + * + * The write goes through three stages: + * 1. Reserve space in ring buffer for the new data. + * Writer atomically moves priv_write_index. + * 2. Copy the new data into the ring. + * 3. Update the tail of the ring (visible to host) that indicates + * next read location. Writer updates write_index + */ +static int +vmbus_txbr_write(struct vmbus_br *tbr, const struct iovec iov[], int iovlen) +{ + struct vmbus_bufring *vbr = tbr->vbr; + uint32_t ring_size = tbr->dsize; + uint32_t old_windex, next_windex, windex, total; + uint64_t save_windex; + int i; + + total = 0; + for (i = 0; i < iovlen; i++) + total += iov[i].iov_len; + total += sizeof(save_windex); + + /* Reserve space in ring */ + do { + uint32_t avail; + + /* Get current free location */ + old_windex = tbr->windex; + + /* Prevent compiler reordering this with calculation */ + rte_compiler_barrier(); + + avail = vmbus_br_availwrite(tbr, old_windex); + + /* If not enough space in ring, then tell caller. */ + if (avail <= total) + return -EAGAIN; + + next_windex = vmbus_br_idxinc(old_windex, total, ring_size); + + /* Atomic update of next write_index for other threads */ + } while (!rte_atomic32_cmpset(&tbr->windex, old_windex, next_windex)); + + /* Space from old..new is now reserved */ + windex = old_windex; + for (i = 0; i < iovlen; i++) + windex = vmbus_txbr_copyto(tbr, windex, iov[i].iov_base, iov[i].iov_len); + + /* Set the offset of the current channel packet. */ + save_windex = ((uint64_t)old_windex) << 32; + windex = vmbus_txbr_copyto(tbr, windex, &save_windex, + sizeof(save_windex)); + + /* The region reserved should match region used */ + if (windex != next_windex) + return -EINVAL; + + /* Ensure that data is available before updating host index */ + rte_compiler_barrier(); + + /* Checkin for our reservation. wait for our turn to update host */ + while (!rte_atomic32_cmpset(&vbr->windex, old_windex, next_windex)) + _mm_pause(); + + return 0; +} + +int rte_vmbus_chan_send(struct vmbus_br *txbr, uint16_t type, void *data, + uint32_t dlen, uint32_t flags) +{ + struct vmbus_chanpkt pkt; + unsigned int pktlen, pad_pktlen; + const uint32_t hlen = sizeof(pkt); + uint64_t pad = 0; + struct iovec iov[3]; + int error; + + pktlen = hlen + dlen; + pad_pktlen = ALIGN(pktlen, sizeof(uint64_t)); + + pkt.hdr.type = type; + pkt.hdr.flags = flags; + pkt.hdr.hlen = hlen >> VMBUS_CHANPKT_SIZE_SHIFT; + pkt.hdr.tlen = pad_pktlen >> VMBUS_CHANPKT_SIZE_SHIFT; + pkt.hdr.xactid = VMBUS_RQST_ERROR; + + iov[0].iov_base = &pkt; + iov[0].iov_len = hlen; + iov[1].iov_base = data; + iov[1].iov_len = dlen; + iov[2].iov_base = &pad; + iov[2].iov_len = pad_pktlen - pktlen; + + error = vmbus_txbr_write(txbr, iov, 3); + + return error; +} + +static inline uint32_t +vmbus_rxbr_copyfrom(const struct vmbus_br *rbr, uint32_t rindex, + void *dst0, size_t cplen) +{ + const uint8_t *br_data = rbr->vbr->data; + uint32_t br_dsize = rbr->dsize; + uint8_t *dst = dst0; + + if (cplen > br_dsize - rindex) { + uint32_t fraglen = br_dsize - rindex; + + /* Wrap-around detected. */ + memcpy(dst, br_data + rindex, fraglen); + memcpy(dst + fraglen, br_data, cplen - fraglen); + } else { + memcpy(dst, br_data + rindex, cplen); + } + + return vmbus_br_idxinc(rindex, cplen, br_dsize); +} + +/* Copy data from receive ring but don't change index */ +static int +vmbus_rxbr_peek(const struct vmbus_br *rbr, void *data, size_t dlen) +{ + uint32_t avail; + + /* + * The requested data and the 64bits channel packet + * offset should be there at least. + */ + avail = vmbus_br_availread(rbr); + if (avail < dlen + sizeof(uint64_t)) + return -EAGAIN; + + vmbus_rxbr_copyfrom(rbr, rbr->vbr->rindex, data, dlen); + return 0; +} + +/* + * Copy data from receive ring and change index + * NOTE: + * We assume (dlen + skip) == sizeof(channel packet). + */ +static int +vmbus_rxbr_read(struct vmbus_br *rbr, void *data, size_t dlen, size_t skip) +{ + struct vmbus_bufring *vbr = rbr->vbr; + uint32_t br_dsize = rbr->dsize; + uint32_t rindex; + + if (vmbus_br_availread(rbr) < dlen + skip + sizeof(uint64_t)) + return -EAGAIN; + + /* Record where host was when we started read (for debug) */ + rbr->windex = rbr->vbr->windex; + + /* + * Copy channel packet from RX bufring. + */ + rindex = vmbus_br_idxinc(rbr->vbr->rindex, skip, br_dsize); + rindex = vmbus_rxbr_copyfrom(rbr, rindex, data, dlen); + + /* + * Discard this channel packet's 64bits offset, which is useless to us. + */ + rindex = vmbus_br_idxinc(rindex, sizeof(uint64_t), br_dsize); + + /* Update the read index _after_ the channel packet is fetched. */ + rte_compiler_barrier(); + + vbr->rindex = rindex; + + return 0; +} + +int rte_vmbus_chan_recv_raw(struct vmbus_br *rxbr, + void *data, uint32_t *len) +{ + struct vmbus_chanpkt_hdr pkt; + uint32_t dlen, bufferlen = *len; + int error; + + error = vmbus_rxbr_peek(rxbr, &pkt, sizeof(pkt)); + if (error) + return error; + + if (unlikely(pkt.hlen < VMBUS_CHANPKT_HLEN_MIN)) + /* XXX this channel is dead actually. */ + return -EIO; + + if (unlikely(pkt.hlen > pkt.tlen)) + return -EIO; + + /* Length are in quad words */ + dlen = pkt.tlen << VMBUS_CHANPKT_SIZE_SHIFT; + *len = dlen; + + /* If caller buffer is not large enough */ + if (unlikely(dlen > bufferlen)) + return -ENOBUFS; + + /* Read data and skip packet header */ + error = vmbus_rxbr_read(rxbr, data, dlen, 0); + if (error) + return error; + + /* Return the number of bytes read */ + return dlen + sizeof(uint64_t); +} diff --git a/tools/hv/vmbus_bufring.h b/tools/hv/vmbus_bufring.h new file mode 100644 index 00000000000000..6e7caacfff5744 --- /dev/null +++ b/tools/hv/vmbus_bufring.h @@ -0,0 +1,158 @@ +/* SPDX-License-Identifier: BSD-3-Clause */ + +#ifndef _VMBUS_BUF_H_ +#define _VMBUS_BUF_H_ + +#include <stdbool.h> +#include <stdint.h> + +#define __packed __attribute__((__packed__)) +#define unlikely(x) __builtin_expect(!!(x), 0) + +#define ICMSGHDRFLAG_TRANSACTION 1 +#define ICMSGHDRFLAG_REQUEST 2 +#define ICMSGHDRFLAG_RESPONSE 4 + +#define IC_VERSION_NEGOTIATION_MAX_VER_COUNT 100 +#define ICMSG_HDR (sizeof(struct vmbuspipe_hdr) + sizeof(struct icmsg_hdr)) +#define ICMSG_NEGOTIATE_PKT_SIZE(icframe_vercnt, icmsg_vercnt) \ + (ICMSG_HDR + sizeof(struct icmsg_negotiate) + \ + (((icframe_vercnt) + (icmsg_vercnt)) * sizeof(struct ic_version))) + +/* + * Channel packets + */ + +/* Channel packet flags */ +#define VMBUS_CHANPKT_TYPE_INBAND 0x0006 +#define VMBUS_CHANPKT_TYPE_RXBUF 0x0007 +#define VMBUS_CHANPKT_TYPE_GPA 0x0009 +#define VMBUS_CHANPKT_TYPE_COMP 0x000b + +#define VMBUS_CHANPKT_FLAG_NONE 0 +#define VMBUS_CHANPKT_FLAG_RC 0x0001 /* report completion */ + +#define VMBUS_CHANPKT_SIZE_SHIFT 3 +#define VMBUS_CHANPKT_SIZE_ALIGN BIT(VMBUS_CHANPKT_SIZE_SHIFT) +#define VMBUS_CHANPKT_HLEN_MIN \ + (sizeof(struct vmbus_chanpkt_hdr) >> VMBUS_CHANPKT_SIZE_SHIFT) + +/* + * Buffer ring + */ +struct vmbus_bufring { + volatile uint32_t windex; + volatile uint32_t rindex; + + /* + * Interrupt mask {0,1} + * + * For TX bufring, host set this to 1, when it is processing + * the TX bufring, so that we can safely skip the TX event + * notification to host. + * + * For RX bufring, once this is set to 1 by us, host will not + * further dispatch interrupts to us, even if there are data + * pending on the RX bufring. This effectively disables the + * interrupt of the channel to which this RX bufring is attached. + */ + volatile uint32_t imask; + + /* + * Win8 uses some of the reserved bits to implement + * interrupt driven flow management. On the send side + * we can request that the receiver interrupt the sender + * when the ring transitions from being full to being able + * to handle a message of size "pending_send_sz". + * + * Add necessary state for this enhancement. + */ + volatile uint32_t pending_send; + uint32_t reserved1[12]; + + union { + struct { + uint32_t feat_pending_send_sz:1; + }; + uint32_t value; + } feature_bits; + + /* Pad it to rte_mem_page_size() so that data starts on page boundary */ + uint8_t reserved2[4028]; + + /* + * Ring data starts here + RingDataStartOffset + * !!! DO NOT place any fields below this !!! + */ + uint8_t data[]; +} __packed; + +struct vmbus_br { + struct vmbus_bufring *vbr; + uint32_t dsize; + uint32_t windex; /* next available location */ +}; + +struct vmbus_chanpkt_hdr { + uint16_t type; /* VMBUS_CHANPKT_TYPE_ */ + uint16_t hlen; /* header len, in 8 bytes */ + uint16_t tlen; /* total len, in 8 bytes */ + uint16_t flags; /* VMBUS_CHANPKT_FLAG_ */ + uint64_t xactid; +} __packed; + +struct vmbus_chanpkt { + struct vmbus_chanpkt_hdr hdr; +} __packed; + +struct vmbuspipe_hdr { + unsigned int flags; + unsigned int msgsize; +} __packed; + +struct ic_version { + unsigned short major; + unsigned short minor; +} __packed; + +struct icmsg_negotiate { + unsigned short icframe_vercnt; + unsigned short icmsg_vercnt; + unsigned int reserved; + struct ic_version icversion_data[]; /* any size array */ +} __packed; + +struct icmsg_hdr { + struct ic_version icverframe; + unsigned short icmsgtype; + struct ic_version icvermsg; + unsigned short icmsgsize; + unsigned int status; + unsigned char ictransaction_id; + unsigned char icflags; + unsigned char reserved[2]; +} __packed; + +int rte_vmbus_chan_recv_raw(struct vmbus_br *rxbr, void *data, uint32_t *len); +int rte_vmbus_chan_send(struct vmbus_br *txbr, uint16_t type, void *data, + uint32_t dlen, uint32_t flags); +void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen); +void *vmbus_uio_map(int *fd, int size); + +/* Amount of space available for write */ +static inline uint32_t vmbus_br_availwrite(const struct vmbus_br *br, uint32_t windex) +{ + uint32_t rindex = br->vbr->rindex; + + if (windex >= rindex) + return br->dsize - (windex - rindex); + else + return rindex - windex; +} + +static inline uint32_t vmbus_br_availread(const struct vmbus_br *br) +{ + return br->dsize - vmbus_br_availwrite(br, br->vbr->windex); +} + +#endif /* !_VMBUS_BUF_H_ */ diff --git a/tools/testing/nvdimm/test/ndtest.c b/tools/testing/nvdimm/test/ndtest.c index b8419f460368a4..2c6285aae852d1 100644 --- a/tools/testing/nvdimm/test/ndtest.c +++ b/tools/testing/nvdimm/test/ndtest.c @@ -830,12 +830,11 @@ static int ndtest_bus_register(struct ndtest_priv *p) return 0; } -static int ndtest_remove(struct platform_device *pdev) +static void ndtest_remove(struct platform_device *pdev) { struct ndtest_priv *p = to_ndtest_priv(&pdev->dev); nvdimm_bus_unregister(p->bus); - return 0; } static int ndtest_probe(struct platform_device *pdev) @@ -882,7 +881,7 @@ static const struct platform_device_id ndtest_id[] = { static struct platform_driver ndtest_driver = { .probe = ndtest_probe, - .remove = ndtest_remove, + .remove_new = ndtest_remove, .driver = { .name = KBUILD_MODNAME, }, |