Documentation/devicetree/bindings/hwmon/maxim,max6650.yaml

   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     };