How can I enable the temperature-controlled fans instead of constantly running

[ericzhang]

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.

 

Edited 4 hours ago by ericzhang

[royk]

It's enabled by default. I believe that you have the wires swapped. There's a topic here about it where I also added a overlay to adjust what speed at which temperature.

I'm not sure if the overlay is still compatible, but since you've already found the source you can change it accordingly.

Edited 2 hours ago by royk