Hello everyone,
I flashed the armbian into my tf cand and inserted it into my OrangePi 5 Plus, with my fans inserted to the specific socket on board (2pin, 1.25mm, 5V, PWM3_IR_M1). However, when I booted it, the fans was running constantly instead of controlled by temperature dynamically, like the official OS images that did only the fans running when the temperature over 50 celsius.
I wanna know how to configure my OS to enable the temperature-controlled fans like the official images.
The offical documents shows:
Linux uses the default pwm-fan drivers to control thye fans and the device tree was defined in orange-pi-5.10-rk3588/arch/arm64/boot/dts/rockchip/rk3588-orangepi-5-plus.dts
Here is the code:
fan: pwm-fan {
compatible = "pwm-fan";
#cooling-cells = <2>;
pwms = <&pwm3 0 50000 0>;
cooling-levels = <0 50 100 150 200 255>;
rockchip,temp-trips = <
50000 1
55000 2
60000 3
65000 4
70000 5
>;
status = "okay";
};
Here are some descriptions regarding some columns:
pwms = <&pwm3 0 50000 0>：The fans use pwm3.
cooling-levels = <0 50 100 150 200 > 255>：Used to configure the speed levels (duty cycle of PWM). The number and magnitude of the levels can be customized. 6 levels are configured, with the speed range from 0 to 255.
rockchip,temp-trips：Used to configure the correspondence between CPU temperature and fan speed levels. This can be adjusted according to actual needs. In the above configuration, 50°C corresponds to level 1, and 70°C corresponds to level 5.
Thank you very much.
