topic Re: Adding new working point - frequency in linux in i.MX Processors

Adding new working point - frequency in linux

mohamad-ahmad — Mon, 19 Nov 2018 15:59:32 GMT

Deciding what frequency within the CPUfreq policy should be used is achieved using "cpufreq governors".

Inside the CPUFreq we can find:

# ls /sys/devices/system/cpu/cpu1/cpufreq/
affected_cpus
related_cpus
scaling_max_freq
bios_limit
scaling_available_frequencies
scaling_min_freq
cpuinfo_cur_freq
scaling_available_governors
scaling_setspeed
cpuinfo_max_freq
scaling_cur_freq
stats
cpuinfo_min_freq
scaling_driver
cpuinfo_transition_latency
scaling_governor

scaling_available_frequencies shows all available frequencies, for example:

# cat scaling_available_frequencies
2997000 2664000 2331000 1998000

How can I add more frequency values?

Can anyone please help me to add additional intermediate frequency values?

Is that can be done in Linux config (kernel compilation) or in the cpufreq driver?

Regrads

Mohamad

Re: Adding new working point - frequency in linux

gusarambula — Thu, 22 Nov 2018 17:21:59 GMT

Hello Mohamad,

Please review the documents mentioned on the following thread. You would need to add the desired frequencies to the board Device Tree.

https://community.nxp.com/message/962882?commentID=962882#comment-962882

I hope this helps!

Regards,

Re: Adding new working point - frequency in linux

mohamad-ahmad — Tue, 27 Nov 2018 08:48:22 GMT

Hi Gusarambula,

The answer that exists in this thread is very helpful!

Thank you