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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/maxim,max6639.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Maxim max6639
maintainers:
- Naresh Solanki <naresh.solanki@9elements.com>
description: |
The MAX6639 is a 2-channel temperature monitor with dual, automatic, PWM
fan-speed controller. It monitors its own temperature and one external
diode-connected transistor or the temperatures of two external diode-connected
transistors, typically available in CPUs, FPGAs, or GPUs.
Datasheets:
https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf
properties:
compatible:
enum:
- maxim,max6639
reg:
maxItems: 1
'#address-cells':
const: 1
'#size-cells':
const: 0
'#pwm-cells':
const: 3
required:
- compatible
- reg
patternProperties:
"^fan@[0-1]$":
type: object
description:
Represents the two fans and their specific configuration.
$ref: fan-common.yaml#
unevaluatedProperties: false
properties:
reg:
description:
The fan number.
required:
- reg
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
fan1: fan-controller@10 {
compatible = "maxim,max6639";
reg = <0x10>;
#address-cells = <1>;
#size-cells = <0>;
#pwm-cells = <3>;
fan@0 {
reg = <0x0>;
pulses-per-revolution = <2>;
max-rpm = <4000>;
target-rpm = <1000>;
pwms = <&fan1 0 25000 0>;
};
fan@1 {
reg = <0x1>;
pulses-per-revolution = <2>;
max-rpm = <8000>;
pwms = <&fan1 1 25000 0>;
};
};
};
...
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