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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/maxim,max31790.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: The Maxim MAX31790 Fan Controller
maintainers:
- Guenter Roeck <linux@roeck-us.net>
- Chanh Nguyen <chanh@os.amperecomputing.com>
description: >
The MAX31790 controls the speeds of up to six fans using six
independent PWM outputs. The desired fan speeds (or PWM duty cycles)
are written through the I2C interface.
Datasheets:
https://datasheets.maximintegrated.com/en/ds/MAX31790.pdf
properties:
compatible:
const: maxim,max31790
reg:
maxItems: 1
clocks:
maxItems: 1
resets:
maxItems: 1
"#pwm-cells":
const: 1
patternProperties:
"^fan-[0-9]+$":
$ref: fan-common.yaml#
unevaluatedProperties: false
required:
- compatible
- reg
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
pwm_provider: fan-controller@20 {
compatible = "maxim,max31790";
reg = <0x20>;
clocks = <&sys_clk>;
resets = <&reset 0>;
#pwm-cells = <1>;
fan-0 {
pwms = <&pwm_provider 1>;
};
fan-1 {
pwms = <&pwm_provider 2>;
};
};
};
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