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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/hwmon/maxim,max6650.yaml
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/hwmon/maxim,max6650.yaml#

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$schema: http://devicetree.org/meta-schemas/core.yaml#

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title: Maxim MAX6650 and MAX6651 I2C Fan Controllers

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maintainers:

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  - Javier Carrasco <javier.carrasco.cruz@gmail.com>

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description: |

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  The MAX6650 and MAX6651 regulate and monitor the speed

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  of 5VDC/12VDC burshless fans with built-in tachometers.

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  Datasheets:

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    https://datasheets.maximintegrated.com/en/ds/MAX6650-MAX6651.pdf

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properties:

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  compatible:

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    enum:

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      - maxim,max6650

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      - maxim,max6651

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  reg:

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    maxItems: 1

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  maxim,fan-microvolt:

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    description:

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      The supply voltage of the fan, either 5000000 uV or

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      12000000 uV.

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    enum: [5000000, 12000000]

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  maxim,fan-prescale:

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    description:

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      Pre-scaling value, as per datasheet. Lower values

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      allow more fine-grained control of slower fans.

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    $ref: /schemas/types.yaml#/definitions/uint32

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    enum: [1, 2, 4, 8, 16]

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  maxim,fan-target-rpm:

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    description:

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      Initial requested fan rotation speed. If specified, the

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      driver selects closed-loop mode and the requested speed.

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      This ensures the fan is already running before userspace

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      takes over.

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    $ref: /schemas/types.yaml#/definitions/uint32

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    maximum: 30000

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required:

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  - compatible

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  - reg

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additionalProperties: false

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examples:

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  - |

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    i2c {

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        #address-cells = <1>;

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        #size-cells = <0>;

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        fan-controller@1b {

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            compatible = "maxim,max6650";

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            reg = <0x1b>;

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            maxim,fan-microvolt = <12000000>;

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            maxim,fan-prescale = <4>;

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            maxim,fan-target-rpm = <1200>;

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        };

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    };

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