| Tom Rini | 762f85b | 2024-07-20 11:15:10 -0600 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | |
| 5 | $id: http://devicetree.org/schemas/hwmon/maxim,max6650.yaml# |
| 6 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 7 | |
| 8 | title: Maxim MAX6650 and MAX6651 I2C Fan Controllers |
| 9 | |
| 10 | maintainers: |
| 11 | - Javier Carrasco <javier.carrasco.cruz@gmail.com> |
| 12 | |
| 13 | description: | |
| 14 | The MAX6650 and MAX6651 regulate and monitor the speed |
| 15 | of 5VDC/12VDC burshless fans with built-in tachometers. |
| 16 | |
| 17 | Datasheets: |
| 18 | https://datasheets.maximintegrated.com/en/ds/MAX6650-MAX6651.pdf |
| 19 | |
| 20 | properties: |
| 21 | compatible: |
| 22 | enum: |
| 23 | - maxim,max6650 |
| 24 | - maxim,max6651 |
| 25 | |
| 26 | reg: |
| 27 | maxItems: 1 |
| 28 | |
| 29 | maxim,fan-microvolt: |
| 30 | description: |
| 31 | The supply voltage of the fan, either 5000000 uV or |
| 32 | 12000000 uV. |
| 33 | enum: [5000000, 12000000] |
| 34 | |
| 35 | maxim,fan-prescale: |
| 36 | description: |
| 37 | Pre-scaling value, as per datasheet. Lower values |
| 38 | allow more fine-grained control of slower fans. |
| 39 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 40 | enum: [1, 2, 4, 8, 16] |
| 41 | |
| 42 | maxim,fan-target-rpm: |
| 43 | description: |
| 44 | Initial requested fan rotation speed. If specified, the |
| 45 | driver selects closed-loop mode and the requested speed. |
| 46 | This ensures the fan is already running before userspace |
| 47 | takes over. |
| 48 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 49 | maximum: 30000 |
| 50 | |
| 51 | required: |
| 52 | - compatible |
| 53 | - reg |
| 54 | |
| 55 | additionalProperties: false |
| 56 | |
| 57 | examples: |
| 58 | - | |
| 59 | i2c { |
| 60 | #address-cells = <1>; |
| 61 | #size-cells = <0>; |
| 62 | |
| 63 | fan-controller@1b { |
| 64 | compatible = "maxim,max6650"; |
| 65 | reg = <0x1b>; |
| 66 | maxim,fan-microvolt = <12000000>; |
| 67 | maxim,fan-prescale = <4>; |
| 68 | maxim,fan-target-rpm = <1200>; |
| 69 | }; |
| 70 | }; |