# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/iio/addac/adi,ad74115.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Analog Devices AD74115H device maintainers: - Cosmin Tanislav description: | The AD74115H is a single-channel software configurable input/output device for industrial control applications. It contains functionality for analog output, analog input, digital output, digital input, resistance temperature detector, and thermocouple measurements integrated into a single chip solution with an SPI interface. The device features a 16-bit ADC and a 14-bit DAC. https://www.analog.com/en/products/ad74115h.html properties: compatible: enum: - adi,ad74115h reg: maxItems: 1 spi-max-frequency: maximum: 24000000 spi-cpol: true reset-gpios: maxItems: 1 interrupts: minItems: 1 maxItems: 2 interrupt-names: minItems: 1 maxItems: 2 items: enum: - adc_rdy - alert avdd-supply: true avcc-supply: true dvcc-supply: true dovdd-supply: true refin-supply: true adi,ch-func: $ref: /schemas/types.yaml#/definitions/uint32 description: | Channel function. 0 - High impedance 1 - Voltage output 2 - Current output 3 - Voltage input 4 - Current input, externally-powered 5 - Current input, loop-powered 6 - Resistance input 7 - RTD measure 8 - Digital input logic 9 - Digital input, loop-powered 10 - Current output with HART 11 - Current input, externally-powered, with HART 12 - Current input, loop-powered, with HART minimum: 0 maximum: 12 default: 0 adi,conv2-mux: $ref: /schemas/types.yaml#/definitions/uint32 description: | Input node for ADC conversion 2. 0 - SENSE_EXT1 to AGND_SENSE 1 - SENSE_EXT2 to AGND_SENSE 2 - SENSE_EXT2 to SENSE_EXT1 3 - AGND to AGND minimum: 0 maximum: 3 default: 0 adi,conv2-range-microvolt: description: Conversion range for ADC conversion 2. oneOf: - items: - enum: [-2500000, 0] - const: 2500000 - items: - enum: [-12000000, 0] - const: 12000000 - items: - const: -2500000 - const: 0 - items: - const: -104000 - const: 104000 - items: - const: 0 - const: 625000 adi,sense-agnd-buffer-low-power: type: boolean description: Whether to enable low-power buffered mode for the AGND sense pin. adi,lf-buffer-low-power: type: boolean description: Whether to enable low-power buffered mode for the low-side filtered sense pin. adi,hf-buffer-low-power: type: boolean description: Whether to enable low-power buffered mode for the high-side filtered sense pin. adi,ext2-buffer-low-power: type: boolean description: Whether to enable low-power buffered mode for the EXT2 pin. adi,ext1-buffer-low-power: type: boolean description: Whether to enable low-power buffered mode for the EXT1 pin. adi,comparator-invert: type: boolean description: Whether to invert the comparator output. adi,digital-input-sink-range-high: $ref: /schemas/types.yaml#/definitions/uint32 description: | When not present, the digital input range is from 0 to 3700uA in steps of 120uA, with a ~2k series resistance. When present, the digital input range is from 0 to 7400uA in steps of 240uA, with a ~1k series resistance. adi,digital-input-sink-microamp: description: Sink current in digital input mode. minimum: 0 maximum: 3700 default: 0 adi,digital-input-debounce-mode-counter-reset: type: boolean description: | When not present, a counter increments when the signal is asserted and decrements when the signal is de-asserted. When present, a counter increments while the signal is asserted and resets when the signal de-asserts adi,digital-input-unbuffered: type: boolean description: Whether to buffer digital input signals. adi,digital-input-short-circuit-detection: type: boolean description: Whether to detect digital input short circuits. adi,digital-input-open-circuit-detection: type: boolean description: Whether to detect digital input open circuits. adi,digital-input-threshold-mode-fixed: type: boolean description: | When not present, the digital input threshold range is -0.96 * AVDD to AVDD. When present, the threshold range is fixed from -19V to 30V. adi,dac-bipolar: type: boolean description: | When not present, the DAC operates in the 0V to 12V range. When present, the DAC operates in the -12V to 12V range. adi,charge-pump: type: boolean description: Whether to enable the internal charge pump. adi,dac-hart-slew: type: boolean description: Whether to use a HART-compatible slew rate. adi,dac-current-limit-low: type: boolean description: | When not present, the DAC short-circuit current limit is 32mA in either source or sink for VOUT and 4mA sink for IOUT. When present, the limit is 16mA in either source or sink for VOUT, 1mA sink for IOUT. adi,4-wire-rtd: type: boolean description: | When not present, the ADC should be used for measuring 3-wire RTDs. When present, the ADC should be used for measuring 4-wire RTDs. adi,3-wire-rtd-excitation-swap: type: boolean description: Whether to swap the excitation for 3-wire RTD. adi,rtd-excitation-current-microamp: description: Excitation current to apply to RTD. enum: [250, 500, 750, 1000] default: 250 adi,ext1-burnout: type: boolean description: Whether to enable burnout current for EXT1. adi,ext1-burnout-current-nanoamp: description: Burnout current in nanoamps to be applied to EXT1. enum: [0, 50, 500, 1000, 10000] default: 0 adi,ext1-burnout-current-polarity-sourcing: type: boolean description: | When not present, the burnout current polarity for EXT1 is sinking. When present, the burnout current polarity for EXT1 is sourcing. adi,ext2-burnout: type: boolean description: Whether to enable burnout current for EXT2. adi,ext2-burnout-current-nanoamp: description: Burnout current in nanoamps to be applied to EXT2. enum: [0, 50, 500, 1000, 10000] default: 0 adi,ext2-burnout-current-polarity-sourcing: type: boolean description: | When not present, the burnout current polarity for EXT2 is sinking. When present, the burnout current polarity for EXT2 is sourcing. adi,viout-burnout: type: boolean description: Whether to enable burnout current for VIOUT. adi,viout-burnout-current-nanoamp: description: Burnout current in nanoamps to be applied to VIOUT. enum: [0, 1000, 10000] default: 0 adi,viout-burnout-current-polarity-sourcing: type: boolean description: | When not present, the burnout current polarity for VIOUT is sinking. When present, the burnout current polarity for VIOUT is sourcing. adi,gpio0-mode: $ref: /schemas/types.yaml#/definitions/uint32 description: | GPIO functions. 0 - Disabled 1 - Logic I/O 2 - Comparator output 3 - Control HART CD 4 - Monitor HART CD 5 - Monitor HART EOM status minimum: 0 maximum: 5 default: 0 adi,gpio1-mode: $ref: /schemas/types.yaml#/definitions/uint32 description: | GPIO functions. 0 - Disabled 1 - Logic I/O 2 - Drive external digital output FET 3 - Control HART RXD 4 - Monitor HART RXD 5 - Monitor HART SOM status minimum: 0 maximum: 5 default: 0 adi,gpio2-mode: $ref: /schemas/types.yaml#/definitions/uint32 description: | GPIO functions. 0 - Disabled 1 - Logic I/O 2 - Drive internal digital output FET 3 - Control HART TXD 4 - Monitor HART TXD 5 - Monitor HART TX complete status minimum: 0 maximum: 5 default: 0 adi,gpio3-mode: $ref: /schemas/types.yaml#/definitions/uint32 description: | GPIO functions. 0 - Disabled 1 - Logic I/O 2 - High impedance 3 - Control HART RTS 4 - Monitor HART RTS 5 - Monitor HART CD complete status minimum: 0 maximum: 5 default: 0 required: - compatible - reg - spi-cpol - avdd-supply allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# - if: required: - adi,digital-input-sink-range-high then: properties: adi,digital-input-sink-microamp: maximum: 7400 unevaluatedProperties: false examples: - | #include #include spi { #address-cells = <1>; #size-cells = <0>; addac@0 { compatible = "adi,ad74115h"; reg = <0>; spi-max-frequency = <12000000>; spi-cpol; reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>; interrupt-parent = <&gpio>; interrupts = <26 IRQ_TYPE_EDGE_FALLING>; interrupt-names = "adc_rdy"; avdd-supply = <&ad74115_avdd>; adi,ch-func = <1>; adi,conv2-mux = <2>; adi,conv2-range-microvolt = <(-12000000) 12000000>; adi,gpio0-mode = <1>; adi,gpio1-mode = <1>; adi,gpio2-mode = <1>; adi,gpio3-mode = <1>; adi,dac-bipolar; }; }; ...