1GMT G762/G763 PWM Fan controller 2 3Required 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 10Optional 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 20If an optional property is not set in .dts file, then current value is kept 21unmodified (e.g. u-boot installed value). 22 23Additional information on operational parameters for the device is available 24in Documentation/hwmon/g762.rst. A detailed datasheet for the device is available 25at http://natisbad.org/NAS/refs/GMT_EDS-762_763-080710-0.2.pdf. 26 27Example 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 }; 48