J784S4XEVM: How to set the cpu frequency under Linux on A72

Bruce Rosier

Prodigy 30 points

Part Number: J784S4XEVM

Tool/software:

Hello all,

I'd like to lock the frequency of the A72 cores by defining a specific governor.

I use this documentation to do so

software-dl.ti.com/.../pm_dfs.html

But when I am on the target, I don't have "/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor" file.

Thank you in advance.

Bruce

26 days ago

0 KB 26 days ago

TI__Guru** 104451 points

Please be aware, that TI resource is out of office for the rest of this week, a delay in response may occur.

Regards,

+1 Jared McArthur 26 days ago in reply to KB

TI__Expert 7425 points

Hi Bruce,

There isn't an opp tables for the J784s4, so there isn't cpu frequency scaling. You can edit the device tree similar to this E2E thread to try and enable the feature.

Best,
Jared

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

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J784S4XEVM: How to set the cpu frequency under Linux on A72