CCS/AM6548: CPU Frequency change runtime.

sarfaraz shaikh

Expert 1536 points

Part Number: AM6548

Tool/software: Code Composer Studio

I am using AM6548 with SDK 6.02 which is latest one. Current SDK does not support CPU frequency scaling from sysfs.

when can I expect the change in SDK for this.

If I want to enable the CPU frequency scaling, what all changes I need to make?

Thanks,

Sarfaraz

over 5 years ago

0 Keerthy J over 5 years ago

TI__Guru**** 163490 points

Hi Sarfaraz,

SDK supports jailhouse and there is no way conceived yet to communicate the frequency
changes from jailhouse to kernel and hence there is no real plan to enable CPU frequency scaling in the
future as well.

That said if you are not bothered about Jailhouse. There are a couple of RFC patches
that you could try to enable DVFS on AM654 part.

Attaching both the patches.

Hope this answers your query. If so please resolve.

Best Regards,
Keerthyhttps://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/am654_2D00_dvfs.7z

0 sarfaraz shaikh over 5 years ago in reply to Keerthy J

Expert 1536 points

Thanks Keerthy. Where can I find more info about this Jailhouse.

0 Keerthy J over 5 years ago in reply to sarfaraz shaikh

TI__Guru**** 163490 points

Hi Sarfaraz,

http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Foundational_Components/Virtualization/Jailhouse.html

Please resolve this issue regarding frequency scaling.

Regards,
Keerthy

Processors

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CCS/AM6548: CPU Frequency change runtime.