dt-bindings: pinctrl: mediatek: Document MT6878 pin controller bindings

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/pinctrl/mediatek,mt6878-pinctrl.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: MediaTek MT6878 Pin Controller

maintainers:

  - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

  - Igor Belwon <igor.belwon@mentallysanemainliners.org>

description:

  The MediaTek MT6878 Pin controller is used to control SoC pins.

properties:

  compatible:

    const: mediatek,mt6878-pinctrl

  reg:

    items:

      - description: pin controller base

      - description: bl group IO

      - description: bm group IO

      - description: br group IO

      - description: bl1 group IO

      - description: br1 group IO

      - description: lm group IO

      - description: lt group IO

      - description: rm group IO

      - description: rt group IO

      - description: EINT controller E block

      - description: EINT controller S block

      - description: EINT controller W block

      - description: EINT controller C block

  reg-names:

    items:

      - const: base

      - const: bl

      - const: bm

      - const: br

      - const: bl1

      - const: br1

      - const: lm

      - const: lt

      - const: rm

      - const: rt

      - const: eint-e

      - const: eint-s

      - const: eint-w

      - const: eint-c

  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:

    maxItems: 216

  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,mt6878-pinctrl";

        reg = <0x10005000 0x1000>,

              <0x11d10000 0x1000>,

              <0x11d30000 0x1000>,

              <0x11d40000 0x1000>,

              <0x11d50000 0x1000>,

              <0x11d60000 0x1000>,

              <0x11e20000 0x1000>,

              <0x11e30000 0x1000>,

              <0x11eb0000 0x1000>,

              <0x11ec0000 0x1000>,

              <0x11ce0000 0x1000>,

              <0x11de0000 0x1000>,

              <0x11e60000 0x1000>,

              <0x1c01e000 0x1000>;

        reg-names = "base", "bl", "bm", "br", "bl1", "br1",

                    "lm", "lt", "rm", "rt", "eint-e", "eint-s",

                    "eint-w", "eint-c";

        gpio-controller;

        #gpio-cells = <2>;

        gpio-ranges = <&pio 0 0 220>;

        interrupt-controller;

        interrupts = <GIC_SPI 239 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>;

            };

        };

    };