xref: /openbmc/linux/Documentation/devicetree/bindings/pinctrl/starfive,jh7110-sys-pinctrl.yaml (revision 9a87ffc99ec8eb8d35eed7c4f816d75f5cc9662e)

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/starfive,jh7110-sys-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: StarFive JH7110 SYS Pin Controller

description: |
  Bindings for the JH7110 RISC-V SoC from StarFive Technology Ltd.

  Out of the SoC's many pins only the ones named PAD_GPIO0 to PAD_GPIO63
  can be multiplexed and have configurable bias, drive strength,
  schmitt trigger etc.
  Some peripherals have their I/O go through the 64 "GPIOs". This also
  includes a number of other UARTs, I2Cs, SPIs, PWMs etc.
  All these peripherals are connected to all 64 GPIOs such that
  any GPIO can be set up to be controlled by any of the peripherals.

maintainers:
  - Jianlong Huang <jianlong.huang@starfivetech.com>

properties:
  compatible:
    const: starfive,jh7110-sys-pinctrl

  reg:
    maxItems: 1

  clocks:
    maxItems: 1

  resets:
    maxItems: 1

  interrupts:
    maxItems: 1

  interrupt-controller: true

  '#interrupt-cells':
    const: 2

  gpio-controller: true

  '#gpio-cells':
    const: 2

patternProperties:
  '-[0-9]+$':
    type: object
    additionalProperties: false
    patternProperties:
      '-pins$':
        type: object
        description: |
          A pinctrl node should contain at least one subnode 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, bias, input enable/disable, input schmitt
          trigger enable/disable, slew-rate and drive strength.
        allOf:
          - $ref: /schemas/pinctrl/pincfg-node.yaml
          - $ref: /schemas/pinctrl/pinmux-node.yaml
        additionalProperties: false

        properties:
          pinmux:
            description: |
              The list of GPIOs and their mux settings that properties in the
              node apply to. This should be set using the GPIOMUX or PINMUX
              macros.

          bias-disable: true

          bias-pull-up:
            type: boolean

          bias-pull-down:
            type: boolean

          drive-strength:
            enum: [ 2, 4, 8, 12 ]

          input-enable: true

          input-disable: true

          input-schmitt-enable: true

          input-schmitt-disable: true

          slew-rate:
            maximum: 1

required:
  - compatible
  - reg
  - clocks
  - interrupts
  - interrupt-controller
  - '#interrupt-cells'
  - gpio-controller
  - '#gpio-cells'

additionalProperties: false

examples:
  - |
    pinctrl@13040000 {
        compatible = "starfive,jh7110-sys-pinctrl";
        reg = <0x13040000 0x10000>;
        clocks = <&syscrg 112>;
        resets = <&syscrg 2>;
        interrupts = <86>;
        interrupt-controller;
        #interrupt-cells = <2>;
        gpio-controller;
        #gpio-cells = <2>;

        uart0-0 {
            tx-pins {
                pinmux = <0xff140005>;
                bias-disable;
                drive-strength = <12>;
                input-disable;
                input-schmitt-disable;
                slew-rate = <0>;
            };

            rx-pins {
                pinmux = <0x0E000406>;
                bias-pull-up;
                drive-strength = <2>;
                input-enable;
                input-schmitt-enable;
                slew-rate = <0>;
            };
        };
    };

...