cpufreq-set not working

[kishan_dudhatra]

Hi,

I am using imx8mm with Kirkstone (5.15.71). I am trying to set the CPU frequency but "/sys/devices/system/cpu/cpufreq" is empty. I also try to run cpufreq-info but getting below error:

cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  no or unknown cpufreq driver is active on this CPU
analyzing CPU 1:
  no or unknown cpufreq driver is active on this CPU
analyzing CPU 2:
  no or unknown cpufreq driver is active on this CPU
analyzing CPU 3:
  no or unknown cpufreq driver is active on this CPU

Can you please suggest how to set CPU frequency from userspace?

[pfiorini]

@ nxp team

Same problem. Any Suggestion?

Regards.

Paolo Fiorini.

[himanshu_bhavani]

Hi @kishan_dudhatra,

One of my colleague is able to resolve the issue.

This is a workaround patch, Please check this patch at your end.

This patch will resolve your issue!

Thanks & Regards,

Himanshu Bhavani

BSP Engineer at Silicon Signals Pvt Ltd | https://siliconsignals.io/

[Alejandro_Salas]

Hello @kishan_dudhatra!

Please refer to the attached document in the section 2.5.3 CPU Frequency Scaling (CPUFREQ), there is explained how to change the CPU frequency in user space. 

I hope this can help to you.

Best regards.

[kishan_dudhatra]

I refer to the documents but cpufreq is not available.

ls: cannot access '/sys/devices/system/cpu/cpu0/cpufreq': No such file or directory

My goal is to set the CPU frequency from userspace in Kirkstone and it's already worked in Zeus. I also try to enable it from driver side but did not succeed.
Can you please provide more information to enable the control to set the CPU frequency from userspace?

[kishan_dudhatra]

@ nxp team,

Could you please reply?