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Diffstat (limited to 'Documentation/devicetree/bindings/pinctrl/mediatek,mt6893-pinctrl.yaml')
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diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt6893-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6893-pinctrl.yaml new file mode 100644 index 000000000000..fa189fe00624 --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6893-pinctrl.yaml @@ -0,0 +1,193 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pinctrl/mediatek,mt6893-pinctrl.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MediaTek MT6893 Pin Controller + +maintainers: + - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> + +description: + The MediaTek's MT6893 Pin controller is used to control SoC pins. + +properties: + compatible: + const: mediatek,mt6893-pinctrl + + reg: + items: + - description: pin controller base + - description: rm group IO + - description: bm group IO + - description: lm group IO + - description: lb group IO + - description: rt group IO + - description: lt group IO + - description: tm group IO + - description: External Interrupt (EINT) controller base + + reg-names: + items: + - const: base + - const: rm + - const: bm + - const: lm + - const: lb + - const: rt + - const: lt + - const: tm + - const: eint + + 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 + + interrupts: + description: The interrupt outputs to sysirq + maxItems: 1 + + interrupt-controller: true + + '#interrupt-cells': + const: 2 + +# PIN CONFIGURATION NODES +patternProperties: + '-pins$': + type: object + additionalProperties: false + + patternProperties: + '^pins': + type: object + allOf: + - $ref: /schemas/pinctrl/pincfg-node.yaml + - $ref: /schemas/pinctrl/pinmux-node.yaml + 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. + + properties: + pinmux: + description: + Integer array, represents gpio pin number and mux setting. + Supported pin number and mux are defined as macros in + arch/arm64/boot/dts/mediatek/mt8196-pinfunc.h for this SoC. + + 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: [75000, 5000] + description: Pull down RSEL type resistance values (in ohms) + description: + For normal pull down type there is no need to specify a resistance + value, hence this can be specified as a boolean property. + For RSEL pull down type a resistance value (in ohms) can be added. + + bias-pull-up: + oneOf: + - type: boolean + - enum: [10000, 5000, 4000, 3000] + description: Pull up RSEL type resistance values (in ohms) + description: + For normal pull up type there is no need to specify a resistance + value, hence this can be specified as a boolean property. + For RSEL pull up type a resistance value (in ohms) can be added. + + 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 + + additionalProperties: false + +required: + - compatible + - reg + - interrupts + - interrupt-controller + - '#interrupt-cells' + - gpio-controller + - '#gpio-cells' + - gpio-ranges + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/pinctrl/mt65xx.h> + #define PINMUX_GPIO0__FUNC_GPIO0 (MTK_PIN_NO(0) | 0) + #define PINMUX_GPIO99__FUNC_SCL0 (MTK_PIN_NO(99) | 1) + #define PINMUX_GPIO100__FUNC_SDA0 (MTK_PIN_NO(100) | 1) + + pio: pinctrl@10005000 { + compatible = "mediatek,mt6893-pinctrl"; + reg = <0x10005000 0x1000>, + <0x11c20000 0x0200>, + <0x11d10000 0x0200>, + <0x11e20000 0x0200>, + <0x11e70000 0x0200>, + <0x11ea0000 0x0200>, + <0x11f20000 0x0200>, + <0x11f30000 0x0200>, + <0x1100b000 0x1000>; + reg-names = "base", "rm", "bm", "lm", "lb", "rt", + "lt", "tm", "eint"; + gpio-controller; + #gpio-cells = <2>; + gpio-ranges = <&pio 0 0 220>; + interrupt-controller; + interrupts = <GIC_SPI 212 IRQ_TYPE_LEVEL_HIGH 0>; + #interrupt-cells = <2>; + + gpio-pins { + pins { + pinmux = <PINMUX_GPIO0__FUNC_GPIO0>; + bias-pull-up = <4000>; + drive-strength = <6>; + }; + }; + + i2c0-pins { + pins-bus { + pinmux = <PINMUX_GPIO99__FUNC_SCL0>, + <PINMUX_GPIO100__FUNC_SDA0>; + bias-pull-down = <75000>; + drive-strength-microamp = <1000>; + }; + }; + }; |