Kernel-4.18.0-80.el8_g762

GMT G762/G763 PWM Fan controller

Required node properties:

• “compatible”: must be either “gmt,g762” or “gmt,g763”
• “reg”: I2C bus address of the device
• “clocks”: a fixed clock providing input clock frequency

    on CLK pin of the chip.
  

Optional properties:

• “fan_startv”: fan startup voltage. Accepted values are 0, 1, 2 and 3.

      The higher the more.
  

• “pwm_polarity”: pwm polarity. Accepted values are 0 (positive duty)

      and 1 (negative duty).
  

• “fan_gear_mode”: fan gear mode. Supported values are 0, 1 and 2.

If an optional property is not set in .dts file, then current value is kept
unmodified (e.g. u-boot installed value).

Additional information on operational parameters for the device is available
in Documentation/hwmon/g762. A detailed datasheet for the device is available
at http://natisbad.org/NAS/refs/GMT_EDS-762_763-080710-0.2.pdf.

Example g762 node:

clocks {
#address-cells = <1>;
#size-cells = <0>;

g762_clk: fixedclk {
     compatible = "fixed-clock";
     #clock-cells = <0>;
     clock-frequency = <8192>;
}

}

g762: g762@3e {
compatible = “gmt,g762”;
reg = <0x3e>;
clocks = <&g762_clk>
fan_gear_mode = <0>; /* chip default /
fan_startv = <1>; / chip default /
pwm_polarity = <0>; / chip default */
};