# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/pinctrl/pinctrl-mt8186.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Mediatek MT8186 Pin Controller maintainers: - Sean Wang description: | The Mediatek's Pin controller is used to control SoC pins. properties: compatible: const: mediatek,mt8186-pinctrl gpio-controller: true '#gpio-cells': description: | Number of cells in GPIO specifier. Since the generic GPIO binding is used, the amount of cells must be specified as 2. See the below mentioned gpio binding representation for description of particular cells. const: 2 gpio-ranges: maxItems: 1 gpio-line-names: true reg: description: | Physical address base for gpio base registers. There are 8 different GPIO physical address base in mt8186. maxItems: 8 reg-names: description: | Gpio base register names. items: - const: iocfg0 - const: iocfg_lt - const: iocfg_lm - const: iocfg_lb - const: iocfg_bl - const: iocfg_rb - const: iocfg_rt - const: eint interrupt-controller: true '#interrupt-cells': const: 2 interrupts: description: The interrupt outputs to sysirq maxItems: 1 mediatek,rsel-resistance-in-si-unit: type: boolean description: | Identifying i2c pins pull up/down type which is RSEL. It can support RSEL define or si unit value(ohm) to set different resistance. # PIN CONFIGURATION NODES patternProperties: '-pins$': type: object additionalProperties: false patternProperties: '^pins': type: object additionalProperties: false description: | A pinctrl node should contain at least one subnodes representing the pinctrl groups available on the machine. Each subnode will list the pins it needs, and how they should be configured, with regard to muxer configuration, pullups, drive strength, input enable/disable and input schmitt. An example of using macro: pincontroller { /* GPIO0 set as multifunction GPIO0 */ gpio-pins { pins { pinmux = ; } }; /* GPIO128 set as multifunction SDA0 */ i2c0-pins { pins { pinmux = ; } }; }; $ref: "pinmux-node.yaml" properties: pinmux: description: | Integer array, represents gpio pin number and mux setting. Supported pin number and mux varies for different SoCs, and are defined as macros in dt-bindings/pinctrl/-pinfunc.h directly. drive-strength: enum: [2, 4, 6, 8, 10, 12, 14, 16] drive-strength-microamp: enum: [125, 250, 500, 1000] bias-pull-down: oneOf: - type: boolean - enum: [100, 101, 102, 103] description: mt8186 pull down PUPD/R0/R1 type define value. - enum: [200, 201, 202, 203] description: mt8186 pull down RSEL type define value. - enum: [75000, 5000] description: mt8186 pull down RSEL type si unit value(ohm). description: | For pull down type is normal, it don't need add RSEL & R1R0 define and resistance value. For pull down type is PUPD/R0/R1 type, it can add R1R0 define to set different resistance. It can support "MTK_PUPD_SET_R1R0_00" & "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & "MTK_PUPD_SET_R1R0_11" define in mt8186. For pull down type is RSEL, it can add RSEL define & resistance value(ohm) to set different resistance by identifying property "mediatek,rsel-resistance-in-si-unit". It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001" & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" define in mt8186. It can also support resistance value(ohm) "75000" & "5000" in mt8186. An example of using RSEL define: pincontroller { i2c0_pin { pins { pinmux = ; bias-pull-down = ; } }; }; An example of using si unit resistance value(ohm): &pio { mediatek,rsel-resistance-in-si-unit; } pincontroller { i2c0_pin { pins { pinmux = ; bias-pull-down = <75000>; } }; }; bias-pull-up: oneOf: - type: boolean - enum: [100, 101, 102, 103] description: mt8186 pull up PUPD/R0/R1 type define value. - enum: [200, 201, 202, 203] description: mt8186 pull up RSEL type define value. - enum: [1000, 5000, 10000, 75000] description: mt8186 pull up RSEL type si unit value(ohm). description: | For pull up type is normal, it don't need add RSEL & R1R0 define and resistance value. For pull up type is PUPD/R0/R1 type, it can add R1R0 define to set different resistance. It can support "MTK_PUPD_SET_R1R0_00" & "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" & "MTK_PUPD_SET_R1R0_11" define in mt8186. For pull up type is RSEL, it can add RSEL define & resistance value(ohm) to set different resistance by identifying property "mediatek,rsel-resistance-in-si-unit". It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001" & "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" define in mt8186. It can also support resistance value(ohm) "1000" & "5000" & "10000" & "75000" in mt8186. An example of using si unit resistance value(ohm): &pio { mediatek,rsel-resistance-in-si-unit; } pincontroller { i2c0-pins { pins { pinmux = ; bias-pull-up = <1000>; } }; }; bias-disable: true output-high: true output-low: true input-enable: true input-disable: true input-schmitt-enable: true input-schmitt-disable: true required: - pinmux required: - compatible - reg - interrupts - interrupt-controller - '#interrupt-cells' - gpio-controller - '#gpio-cells' - gpio-ranges additionalProperties: false examples: - | #include #include pio: pinctrl@10005000 { compatible = "mediatek,mt8186-pinctrl"; reg = <0x10005000 0x1000>, <0x10002000 0x0200>, <0x10002200 0x0200>, <0x10002400 0x0200>, <0x10002600 0x0200>, <0x10002A00 0x0200>, <0x10002c00 0x0200>, <0x1000b000 0x1000>; reg-names = "iocfg0", "iocfg_lt", "iocfg_lm", "iocfg_lb", "iocfg_bl", "iocfg_rb", "iocfg_rt", "eint"; gpio-controller; #gpio-cells = <2>; gpio-ranges = <&pio 0 0 185>; interrupt-controller; interrupts = ; #interrupt-cells = <2>; pio-pins { pins { pinmux = ; output-low; }; }; spi0-pins { pins-spi { pinmux = , , ; bias-disable; }; pins-spi-mi { pinmux = ; bias-pull-down; }; }; i2c0-pins { pins { pinmux = , ; bias-pull-up = ; drive-strength-microamp = <1000>; }; }; };