Tuesday, December 7, 2021

[fedora-arm] Re: Rockpro64 fan control

Dennis and Peter 

Thank you, your solutions worked.  The kernel module pwm_fan is loaded.  I wrote 110 to the pwm1 file and the fan started. I was able to modulate the fan speed up to 255. 

Aaron

On Tue, 2021-12-07 at 07:12 -0600, Dennis Gilmore wrote:
Try running "echo 110 > /sys/class/hwmon/hwmon1/pwm1" then bump it back to 255 I have found that to work on a different rockchip based device

Dennis

On Tue, Dec 7, 2021, 05:30 Peter Robinson <pbrobinson@gmail.com> wrote:
> The fan on my Rockpro64 does not work with fedora 34 installed.  The
> file /sys/class/hwmon/hwmon1/pwm1 has the value 255. All the solution I
> have found were for Debian/Ubuntu and require installing firmware.

All the pieces should be upstream, is the pwm-fan module loaded?

P
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