tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1Bindings for a fan connected to the PWM lines
2
3Required properties:
4- compatible : "pwm-fan"
5- pwms : the PWM that is used to control the PWM fan
6- cooling-levels : PWM duty cycle values in a range from 0 to 255
7 which correspond to thermal cooling states
8
9Example:
10 fan0: pwm-fan {
11 compatible = "pwm-fan";
12 cooling-min-state = <0>;
13 cooling-max-state = <3>;
14 #cooling-cells = <2>;
15 pwms = <&pwm 0 10000 0>;
16 cooling-levels = <0 102 170 230>;
17 };
18
19 thermal-zones {
20 cpu_thermal: cpu-thermal {
21 thermal-sensors = <&tmu 0>;
22 polling-delay-passive = <0>;
23 polling-delay = <0>;
24 trips {
25 cpu_alert1: cpu-alert1 {
26 temperature = <100000>; /* millicelsius */
27 hysteresis = <2000>; /* millicelsius */
28 type = "passive";
29 };
30 };
31 cooling-maps {
32 map0 {
33 trip = <&cpu_alert1>;
34 cooling-device = <&fan0 0 1>;
35 };
36 };
37 };