# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id:
http://devicetree.org/schemas/hwmon/gpio-fan.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: Fan connected to GPIO lines
maintainers:
- Rob Herring <robh@kernel.org>
properties:
compatible:
const: gpio-fan
gpios:
description: |
Specifies the pins that map to bits in the control value,
ordered MSB-->LSB.
minItems: 1
maxItems: 7
alarm-gpios:
maxItems: 1
fan-supply:
description: Power supply for fan
gpio-fan,speed-map:
$ref: /schemas/types.yaml#/definitions/uint32-matrix
minItems: 2
maxItems: 127
items:
items:
- description: fan speed in RPMs
- description: control value
description: |
A mapping of possible fan RPM speeds and the
control value that should be set to achieve them. This array
must have the RPM values in ascending order.
'#cooling-cells':
const: 2
required:
- compatible
- gpios
- gpio-fan,speed-map
additionalProperties: false
examples:
- |
gpio-fan {
compatible = "gpio-fan";
gpios = <&gpio2 14 1
&gpio2 13 1>;
gpio-fan,speed-map = < 0 0>,
<3000 1>,
<6000 2>;
alarm-gpios = <&gpio2 15 1>;
#cooling-cells = <2>; /* min followed by max */
};
