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 */ };