linux-stable/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/mediatek,mt6779-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Mediatek MT6779 Pin Controller Device Tree Bindings

maintainers:
  - Andy Teng <andy.teng@mediatek.com>

description: |+
  The pin controller node should be the child of a syscon node with the
  required property:
  - compatible: "syscon"  

properties:
  compatible:
    const: mediatek,mt6779-pinctrl

  reg:
    minItems: 9
    maxItems: 9

  reg-names:
    items:
      - const: "gpio"
      - const: "iocfg_rm"
      - const: "iocfg_br"
      - const: "iocfg_lm"
      - const: "iocfg_lb"
      - const: "iocfg_rt"
      - const: "iocfg_lt"
      - const: "iocfg_tl"
      - const: "eint"

  gpio-controller: true

  "#gpio-cells":
    const: 2
    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.      

  gpio-ranges:
    minItems: 1
    maxItems: 5
    description: |
      GPIO valid number range.      

  interrupt-controller: true

  interrupts:
    maxItems: 1
    description: |
      Specifies the summary IRQ.      

  "#interrupt-cells":
    const: 2

allOf:
  - $ref: "pinctrl.yaml#"

required:
  - compatible
  - reg
  - reg-names
  - gpio-controller
  - "#gpio-cells"
  - gpio-ranges
  - interrupt-controller
  - interrupts
  - "#interrupt-cells"

patternProperties:
  '-[0-9]*$':
    type: object
    patternProperties:
      '-pins*$':
        type: object
        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.          
        $ref: "/schemas/pinctrl/pincfg-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 boot/dts/<soc>-pinfunc.h directly.

          bias-disable: true

          bias-pull-up: true

          bias-pull-down: true

          input-enable: true

          input-disable: true

          output-low: true

          output-high: true

          input-schmitt-enable: true

          input-schmitt-disable: true

          mediatek,pull-up-adv:
            description: |
              Pull up setings for 2 pull resistors, R0 and R1. User can
              configure those special pins. Valid arguments are described as below:
              0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
              1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
              2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
              3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.              
            $ref: /schemas/types.yaml#/definitions/uint32
            enum: [0, 1, 2, 3]

          mediatek,pull-down-adv:
            description: |
              Pull down settings for 2 pull resistors, R0 and R1. User can
              configure those special pins. Valid arguments are described as below:
              0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
              1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
              2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
              3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.              
            $ref: /schemas/types.yaml#/definitions/uint32
            enum: [0, 1, 2, 3]

        required:
          - pinmux

        additionalProperties: false

additionalProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/irq.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/pinctrl/mt6779-pinfunc.h>

    soc {
        #address-cells = <2>;
        #size-cells = <2>;

        pio: pinctrl@10005000 {
            compatible = "mediatek,mt6779-pinctrl";
            reg = <0 0x10005000 0 0x1000>,
                <0 0x11c20000 0 0x1000>,
                <0 0x11d10000 0 0x1000>,
                <0 0x11e20000 0 0x1000>,
                <0 0x11e70000 0 0x1000>,
                <0 0x11ea0000 0 0x1000>,
                <0 0x11f20000 0 0x1000>,
                <0 0x11f30000 0 0x1000>,
                <0 0x1000b000 0 0x1000>;
            reg-names = "gpio", "iocfg_rm",
              "iocfg_br", "iocfg_lm",
              "iocfg_lb", "iocfg_rt",
              "iocfg_lt", "iocfg_tl",
              "eint";
            gpio-controller;
            #gpio-cells = <2>;
            gpio-ranges = <&pio 0 0 210>;
            interrupt-controller;
            #interrupt-cells = <2>;
            interrupts = <GIC_SPI 204 IRQ_TYPE_LEVEL_HIGH>;

            mmc0_pins_default: mmc0-0 {
                cmd-dat-pins {
                    pinmux = <PINMUX_GPIO168__FUNC_MSDC0_DAT0>,
                        <PINMUX_GPIO172__FUNC_MSDC0_DAT1>,
                        <PINMUX_GPIO169__FUNC_MSDC0_DAT2>,
                        <PINMUX_GPIO177__FUNC_MSDC0_DAT3>,
                        <PINMUX_GPIO170__FUNC_MSDC0_DAT4>,
                        <PINMUX_GPIO173__FUNC_MSDC0_DAT5>,
                        <PINMUX_GPIO171__FUNC_MSDC0_DAT6>,
                        <PINMUX_GPIO174__FUNC_MSDC0_DAT7>,
                        <PINMUX_GPIO167__FUNC_MSDC0_CMD>;
                    input-enable;
                    mediatek,pull-up-adv = <1>;
                };
                clk-pins {
                    pinmux = <PINMUX_GPIO176__FUNC_MSDC0_CLK>;
                    mediatek,pull-down-adv = <2>;
                };
                rst-pins {
                    pinmux = <PINMUX_GPIO178__FUNC_MSDC0_RSTB>;
                    mediatek,pull-up-adv = <0>;
                };
            };
        };

        mmc0 {
           pinctrl-0 = <&mmc0_pins_default>;
           pinctrl-names = "default";
        };
    };