| 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.rst. 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 */ |
| }; |
