Documentation/devicetree/bindings/hwmon/g762.txt

   1 GMT G762/G763 PWM Fan controller
   2
   3 Required node properties:
   4
   5  - "compatible": must be either "gmt,g762" or "gmt,g763"
   6  - "reg": I2C bus address of the device
   7  - "clocks": a fixed clock providing input clock frequency
   8              on CLK pin of the chip.
   9
  10 Optional properties:
  11
  12  - "fan_startv": fan startup voltage. Accepted values are 0, 1, 2 and 3.
  13                The higher the more.
  14
  15  - "pwm_polarity": pwm polarity. Accepted values are 0 (positive duty)
  16                and 1 (negative duty).
  17
  18  - "fan_gear_mode": fan gear mode. Supported values are 0, 1 and 2.
  19
  20 If an optional property is not set in .dts file, then current value is kept
  21 unmodified (e.g. u-boot installed value).
  22
  23 Additional information on operational parameters for the device is available
  24 in Documentation/hwmon/g762.rst. A detailed datasheet for the device is available
  25 at http://natisbad.org/NAS/refs/GMT_EDS-762_763-080710-0.2.pdf.
  26
  27 Example g762 node:
  28
  29    clocks {
  30         #address-cells = <1>;
  31         #size-cells = <0>;
  32
  33         g762_clk: fixedclk {
  34                  compatible = "fixed-clock";
  35                  #clock-cells = <0>;
  36                  clock-frequency = <8192>;
  37         }
  38    }
  39
  40    g762: g762@3e {
  41         compatible = "gmt,g762";
  42         reg = <0x3e>;
  43         clocks = <&g762_clk>
  44         fan_gear_mode = <0>; /* chip default */
  45         fan_startv = <1>;    /* chip default */
  46         pwm_polarity = <0>;  /* chip default */
  47    };