Dragonboard 820c cpufreq governor


How can I monitor and control the CPU frequency on the Dragonboard 820c ?

The cpufreq module is not part of the current kernel image.
Why is it missing?


which image are you using?

If you use our Debian images, it should be there in the recent images, from :


which are based on this kernel commit:



Thanks, I used the pre-shipped image. The new build isn’t mentioned on the wiki. See


right… we are in the middle of migrating the documentation from the ‘old’ wiki to the more official location here:

the new link above points to the correct builds. we need to deprecate the wiki… i will make a change later today.


Thanks. That worked.

root@linaro-developer:~# cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq

root@linaro-developer:~# uname -a
Linux linaro-developer 4.11.0-qcomlt-arm64 #1 SMP PREEMPT Thu Jan 11 19:22:20 UTC 2018 aarch64 GNU/Linux