# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/microchip,emc2305.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Microchip EMC2305 SMBus compliant PWM fan controller

maintainers:
  - Michael Shych <michaelsh@nvidia.com>

description:
  Microchip EMC2301/2/3/5 pwm controller which supports up to five programmable
  fan control circuits.

properties:
  compatible:
    oneOf:
      - enum:
          - microchip,emc2305
      - items:
          - enum:
              - microchip,emc2303
              - microchip,emc2302
              - microchip,emc2301
          - const: microchip,emc2305

  reg:
    maxItems: 1
 
  '#address-cells':
    const: 1
 
  '#size-cells':
    const: 0
 
  '#pwm-cells':
    const: 3
    description: |
      Number of cells in a PWM specifier.
      - cell 0: The PWM frequency
      - cell 1: The PWM polarity: 0 or PWM_POLARITY_INVERTED
      - cell 2: The PWM output config:
           - 0 (Open-Drain)
           - 1 (Push-Pull)

patternProperties:
  '^fan@[0-4]$':
    $ref: fan-common.yaml#
    unevaluatedProperties: false
    properties:
      reg:
        description:
          The fan number used to determine the associated PWM channel.
        maxItems: 1

    required:
      - reg

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
    #include <dt-bindings/pwm/pwm.h>
    i2c {
        #address-cells = <1>;
        #size-cells = <0>;
 
        fan_controller: fan-controller@2f {
            compatible = "microchip,emc2305";
            reg = <0x2f>;
            #address-cells = <1>;
            #size-cells = <0>;
            #pwm-cells = <3>;
 
            fan@0 {
                reg = <0x0>;
                pwms = <&fan_controller 26000 PWM_POLARITY_INVERTED 1>;
                #cooling-cells = <2>;
            };
 
            fan@1 {
                reg = <0x1>;
                pwms = <&fan_controller 26000 0 1>;
                #cooling-cells = <2>;
            };
 
            fan@2 {
                reg = <0x2>;
                pwms = <&fan_controller 26000 0 1>;
                #cooling-cells = <2>;
            };
 
            fan@3 {
                reg = <0x3>;
                pwms = <&fan_controller 26000 0 1>;
                #cooling-cells = <2>;
            };
 
            fan@4 {
                reg = <0x4>;
                pwms = <&fan_controller 26000 0 1>;
                #cooling-cells = <2>;
            };
        };
    };
...