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Bindings for the Raspberry Pi PoE HAT fan
Required properties:
- compatible : "raspberrypi,rpi-poe-fan"
- firmware : Reference to the RPi firmware device node
- 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: rpi-poe-fan@0 {
compatible = "raspberrypi,rpi-poe-fan";
firmware = <&firmware>;
cooling-min-state = <0>;
cooling-max-state = <3>;
#cooling-cells = <2>;
cooling-levels = <0 50 150 255>;
status = "okay";
};
thermal-zones {
cpu_thermal: cpu-thermal {
trips {
threshold: trip-point@0 {
temperature = <45000>;
hysteresis = <5000>;
type = "active";
};
target: trip-point@1 {
temperature = <50000>;
hysteresis = <2000>;
type = "active";
};
cpu_hot: cpu_hot@0 {
temperature = <55000>;
hysteresis = <2000>;
type = "active";
};
};
cooling-maps {
map0 {
trip = <&threshold>;
cooling-device = <&fan0 0 1>;
};
map1 {
trip = <&target>;
cooling-device = <&fan0 1 2>;
};
map2 {
trip = <&cpu_hot>;
cooling-device = <&fan0 2 3>;
};
};
};
};
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