1*4882a593SmuzhiyunGMT G762/G763 PWM Fan controller 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunRequired node properties: 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun - "compatible": must be either "gmt,g762" or "gmt,g763" 6*4882a593Smuzhiyun - "reg": I2C bus address of the device 7*4882a593Smuzhiyun - "clocks": a fixed clock providing input clock frequency 8*4882a593Smuzhiyun on CLK pin of the chip. 9*4882a593Smuzhiyun 10*4882a593SmuzhiyunOptional properties: 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun - "fan_startv": fan startup voltage. Accepted values are 0, 1, 2 and 3. 13*4882a593Smuzhiyun The higher the more. 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun - "pwm_polarity": pwm polarity. Accepted values are 0 (positive duty) 16*4882a593Smuzhiyun and 1 (negative duty). 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun - "fan_gear_mode": fan gear mode. Supported values are 0, 1 and 2. 19*4882a593Smuzhiyun 20*4882a593SmuzhiyunIf an optional property is not set in .dts file, then current value is kept 21*4882a593Smuzhiyununmodified (e.g. u-boot installed value). 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunAdditional information on operational parameters for the device is available 24*4882a593Smuzhiyunin Documentation/hwmon/g762.rst. A detailed datasheet for the device is available 25*4882a593Smuzhiyunat http://natisbad.org/NAS/refs/GMT_EDS-762_763-080710-0.2.pdf. 26*4882a593Smuzhiyun 27*4882a593SmuzhiyunExample g762 node: 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun clocks { 30*4882a593Smuzhiyun #address-cells = <1>; 31*4882a593Smuzhiyun #size-cells = <0>; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun g762_clk: fixedclk { 34*4882a593Smuzhiyun compatible = "fixed-clock"; 35*4882a593Smuzhiyun #clock-cells = <0>; 36*4882a593Smuzhiyun clock-frequency = <8192>; 37*4882a593Smuzhiyun } 38*4882a593Smuzhiyun } 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun g762: g762@3e { 41*4882a593Smuzhiyun compatible = "gmt,g762"; 42*4882a593Smuzhiyun reg = <0x3e>; 43*4882a593Smuzhiyun clocks = <&g762_clk> 44*4882a593Smuzhiyun fan_gear_mode = <0>; /* chip default */ 45*4882a593Smuzhiyun fan_startv = <1>; /* chip default */ 46*4882a593Smuzhiyun pwm_polarity = <0>; /* chip default */ 47*4882a593Smuzhiyun }; 48