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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/hwmon/maxim,max6650.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Maxim MAX6650 and MAX6651 I2C Fan Controllers
maintainers:
- Javier Carrasco <javier.carrasco.cruz@gmail.com>
description: |
The MAX6650 and MAX6651 regulate and monitor the speed
of 5VDC/12VDC burshless fans with built-in tachometers.
Datasheets:
https://datasheets.maximintegrated.com/en/ds/MAX6650-MAX6651.pdf
properties:
compatible:
enum:
- maxim,max6650
- maxim,max6651
reg:
maxItems: 1
maxim,fan-microvolt:
description:
The supply voltage of the fan, either 5000000 uV or
12000000 uV.
enum: [5000000, 12000000]
maxim,fan-prescale:
description:
Pre-scaling value, as per datasheet. Lower values
allow more fine-grained control of slower fans.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [1, 2, 4, 8, 16]
maxim,fan-target-rpm:
description:
Initial requested fan rotation speed. If specified, the
driver selects closed-loop mode and the requested speed.
This ensures the fan is already running before userspace
takes over.
$ref: /schemas/types.yaml#/definitions/uint32
maximum: 30000
required:
- compatible
- reg
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
fan-controller@1b {
compatible = "maxim,max6650";
reg = <0x1b>;
maxim,fan-microvolt = <12000000>;
maxim,fan-prescale = <4>;
maxim,fan-target-rpm = <1200>;
};
};
|
