linux-zen-server/Documentation/devicetree/bindings/pinctrl/qcom,sm8250-lpass-lpi-pinctrl.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/qcom,sm8250-lpass-lpi-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Qualcomm SM8250 SoC LPASS LPI TLMM

maintainers:
  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

description:
  Top Level Mode Multiplexer pin controller in the Low Power Audio SubSystem
  (LPASS) Low Power Island (LPI) of Qualcomm SM8250 SoC.

properties:
  compatible:
    const: qcom,sm8250-lpass-lpi-pinctrl

  reg:
    maxItems: 2

  clocks:
    items:
      - description: LPASS Core voting clock
      - description: LPASS Audio voting clock

  clock-names:
    items:
      - const: core
      - const: audio

  gpio-controller: true

  "#gpio-cells":
    description: Specifying the pin number and flags, as defined in
      include/dt-bindings/gpio/gpio.h
    const: 2

  gpio-ranges:
    maxItems: 1

patternProperties:
  "-state$":
    oneOf:
      - $ref: "#/$defs/qcom-sm8250-lpass-state"
      - patternProperties:
          "-pins$":
            $ref: "#/$defs/qcom-sm8250-lpass-state"
        additionalProperties: false

$defs:
  qcom-sm8250-lpass-state:
    type: object
    description:
      Pinctrl node's client devices use subnodes for desired pin configuration.
      Client device subnodes use below standard properties.
    $ref: "/schemas/pinctrl/pincfg-node.yaml"

    properties:
      pins:
        description:
          List of gpio pins affected by the properties specified in this
          subnode.
        items:
          oneOf:
            - pattern: "^gpio([0-9]|1[0-3])$"
        minItems: 1
        maxItems: 14

      function:
        enum: [ gpio, swr_tx_clk, qua_mi2s_sclk, swr_tx_data, qua_mi2s_ws,
                qua_mi2s_data, swr_rx_clk, swr_rx_data, dmic1_clk, i2s1_clk,
                dmic1_data, i2s1_ws, dmic2_clk, dmic2_data, i2s1_data,
                i2s2_clk, wsa_swr_clk, i2s2_ws, wsa_swr_data, dmic3_clk,
                dmic3_data, i2s2_data ]
        description:
          Specify the alternative function to be configured for the specified
          pins.

      drive-strength:
        enum: [2, 4, 6, 8, 10, 12, 14, 16]
        default: 2
        description:
          Selects the drive strength for the specified pins, in mA.

      slew-rate:
        enum: [0, 1, 2, 3]
        default: 0
        description: |
            0: No adjustments
            1: Higher Slew rate (faster edges)
            2: Lower Slew rate (slower edges)
            3: Reserved (No adjustments)

      bias-pull-down: true
      bias-pull-up: true
      bias-bus-hold: true
      bias-disable: true
      input-enable: true
      output-high: true
      output-low: true

    required:
      - pins
      - function

    additionalProperties: false

allOf:
  - $ref: pinctrl.yaml#

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - gpio-controller
  - "#gpio-cells"
  - gpio-ranges

additionalProperties: false

examples:
  - |
    #include <dt-bindings/sound/qcom,q6afe.h>
    lpi_tlmm: pinctrl@33c0000 {
        compatible = "qcom,sm8250-lpass-lpi-pinctrl";
        reg = <0x33c0000 0x20000>,
              <0x3550000 0x10000>;
        clocks = <&q6afecc LPASS_HW_MACRO_VOTE LPASS_CLK_ATTRIBUTE_COUPLE_NO>,
                 <&q6afecc LPASS_HW_DCODEC_VOTE LPASS_CLK_ATTRIBUTE_COUPLE_NO>;
        clock-names = "core", "audio";
        gpio-controller;
        #gpio-cells = <2>;
        gpio-ranges = <&lpi_tlmm 0 0 14>;

        wsa-swr-active-state {
            clk-pins {
                pins = "gpio10";
                function = "wsa_swr_clk";
                drive-strength = <2>;
                slew-rate = <1>;
                bias-disable;
            };

            data-pins {
                pins = "gpio11";
                function = "wsa_swr_data";
                drive-strength = <2>;
                slew-rate = <1>;
            };
        };

        tx-swr-sleep-clk-state {
            pins = "gpio0";
            function = "swr_tx_clk";
            drive-strength = <2>;
            bias-pull-down;
        };
    };