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- Bindings for a fan connected to the PWM lines
- Required properties:
- - compatible : "pwm-fan"
- - pwms : the PWM that is used to control the PWM fan
- - cooling-levels : PWM duty cycle values in a range from 0 to 255
- which correspond to thermal cooling states
- Example:
- fan0: pwm-fan {
- compatible = "pwm-fan";
- cooling-min-state = <0>;
- cooling-max-state = <3>;
- #cooling-cells = <2>;
- pwms = <&pwm 0 10000 0>;
- cooling-levels = <0 102 170 230>;
- };
- thermal-zones {
- cpu_thermal: cpu-thermal {
- thermal-sensors = <&tmu 0>;
- polling-delay-passive = <0>;
- polling-delay = <0>;
- trips {
- cpu_alert1: cpu-alert1 {
- temperature = <100000>; /* millicelsius */
- hysteresis = <2000>; /* millicelsius */
- type = "passive";
- };
- };
- cooling-maps {
- map0 {
- trip = <&cpu_alert1>;
- cooling-device = <&fan0 0 1>;
- };
- };
- };
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