| # 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>; |
| }; |
| }; |
