xref: /freebsd/sys/contrib/device-tree/Bindings/pwm/argon40,fan-hat.yaml (revision 833e5d42ab135b0238e61c5b3c19b8619677cbfa)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pwm/argon40,fan-hat.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Argon40 Fan HAT PWM controller

maintainers:
  - Marek Vasut <marek.vasut+renesas@mailbox.org>

description:
  The trivial PWM on Argon40 Fan HAT, which is a RaspberryPi blower fan
  hat which can be controlled over I2C, generates a fixed 30 kHz period
  PWM signal with configurable 0..100% duty cycle to control the fan
  speed.

allOf:
  - $ref: pwm.yaml#

properties:
  compatible:
    const: argon40,fan-hat

  reg:
    maxItems: 1

  "#pwm-cells":
    const: 3

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
    i2c {
      #address-cells = <1>;
      #size-cells = <0>;

      pwm@1a {
        compatible = "argon40,fan-hat";
        reg = <0x1a>;
        #pwm-cells = <3>;
      };
    };