xref: /openbmc/linux/Documentation/devicetree/bindings/leds/leds-lgm.yaml (revision 580f9896)

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

title: Intel Lightning Mountain (LGM) SoC LED Serial Shift Output (SSO) Controller driver

maintainers:
  - Zhu, Yi Xin <Yixin.zhu@intel.com>
  - Amireddy Mallikarjuna reddy <mallikarjunax.reddy@intel.com>

properties:
  compatible:
    const: intel,lgm-ssoled

  reg:
    maxItems: 1

  clocks:
    maxItems: 2

  clock-names:
    items:
      - const: sso
      - const: fpid

  gpio-controller: true

  '#gpio-cells':
    const: 2

  ngpios:
    minimum: 0
    maximum: 32
    description:
      Number of GPIOs this controller provides.

  intel,sso-update-rate-hz:
    description:
      Blink frequency for SOUTs in Hz.

  led-controller:
    type: object
    description:
      This sub-node must contain a sub-node for each leds.

    additionalProperties: false

    properties:
      '#address-cells':
        const: 1

      '#size-cells':
        const: 0

    patternProperties:
      "^led@[0-2]$":
        $ref: common.yaml#
        unevaluatedProperties: false

        properties:
          reg:
            description: Index of the LED.
            minimum: 0
            maximum: 2

          led-gpios:
            maxItems: 1

          intel,sso-hw-trigger:
            type: boolean
            description: This property indicates Hardware driven/control LED.

          intel,sso-hw-blink:
            type: boolean
            description: This property indicates Enable LED blink by Hardware.

          intel,sso-blink-rate-hz:
            description: LED HW blink frequency.

          retain-state-suspended:
            type: boolean
            description: The suspend state of LED can be retained.

          retain-state-shutdown:
            type: boolean
            description: Retain the state of the LED on shutdown.

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

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/intel,lgm-clk.h>
    #include <dt-bindings/leds/common.h>

    ssogpio: ssogpio@e0d40000 {
      compatible = "intel,lgm-ssoled";
      reg = <0xE0D40000 0x2E4>;
      gpio-controller;
      #gpio-cells = <2>;
      ngpios = <32>;
      pinctrl-names = "default";
      pinctrl-0 = <&pinctrl_ledc>;
      clocks = <&cgu0 LGM_GCLK_LEDC0>, <&afeclk>;
      clock-names = "sso", "fpid";
      intel,sso-update-rate-hz = <250000>;

      led-controller {
        #address-cells = <1>;
        #size-cells = <0>;

        led@0 {
          reg = <0>;
          function = "gphy";
          color = <LED_COLOR_ID_GREEN>;
          led-gpios = <&ssogpio 0 0>;
        };

        led@2 {
          reg = <2>;
          function = LED_FUNCTION_POWER;
          color = <LED_COLOR_ID_GREEN>;
          led-gpios = <&ssogpio 23 0>;
        };
      };
    };