CPU Fan PWM control issue

ROCK 5 Series 5 ITX/ITX+
1

Hi, was anyone able to figure out the PWM fan control on the board? I am running Armbian 24.5.1 Bookworm with Linux 6.1.75-vendor-rk35xx and so far I was not able to find any way how to configure the CPU fan.
Sometimes the fan keeps at 100% after a power up but also other times it spins down completely after post and remains off.

In both cases the fan doesn’t seem to be detected.
/usr/sbin/pwmconfig: There are no fan-capable sensor modules installed
or

Loading configuration from /etc/fancontrol ...
Error: Can't read configuration file

or

root@rock-5-itx:~$ lshw | grep pwm
root@rock-5-itx:~$ lshw | grep fan

with no output

Thanks

2
3

Thx, I am now at least able to statically control the fan using. Following Guide on how to customize you pwm fan curve

root@rock-5-itx:~# echo user_space > /sys/class/thermal/thermal_zone0/policy
root@rock-5-itx:~# echo 90 > /sys/devices/platform/pwm-fan/hwmon/hwmon9/pwm1

However, the overlay PWM cooling map trips in for the rock 5 itx seems to be completely missing in https://github.com/armbian/linux-rockchip/blob/rk-6.1-rkr3/arch/arm64/boot/dts/rockchip/rk3588-rock-5-itx.dts#L971-L987 and I am not sure how to add it manually.

4

I can confirm this.
On rock5 itx using the method (Guide on how to customize you pwm fan curve) does not work properly.
the lowest set PWM value is used. Values do not change with temperature.

Rock 5 ITX
Armbian 24.5.1 Bookworm with Linux 5.10.160-legacy-rk35xx

5

on rock 5 itx, this works

echo user_space > /sys/class/thermal/thermal_zone0/policy
echo 1  > /sys/devices/platform/pwm-fan/hwmon/hwmon13/pwm1

After installing linux-image-current-rockchip64

sudo apt install linux-image-current-rockchip64=25.2.3 linux-dtb-current-rockchip64=25.2.3 linux-libc-dev-current-rockchip64=25.2.3