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# 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>;
};
};
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