Dragonboard 820c cpufreq governor


#1

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?


#2

which image are you using?

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

http://snapshots.linaro.org/96boards/dragonboard820c/linaro/debian/latest/

which are based on this kernel commit:

https://git.linaro.org/landing-teams/working/qualcomm/kernel.git/log/?h=release/db820c/qcomlt-4.11


#3

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


#4

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.


#5

Thanks. That worked.

root@linaro-developer:~# cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq
1593600
1593600
2150400
2150400

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