Rockpro64 fan control

[Aaron J. Siegel]

Hello

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.

Thank you
Aaron

[Peter Robinson]

>  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

[Dennis Gilmore]

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(a)gmail.com&gt; 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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[Aaron J. Siegel]

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(a)gmail.com&gt;
>  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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