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Urgent! More for cpufreq driver on OMAP35x

Rico42918
Prodigy 20 points
Other Parts Discussed in Thread: OMAP3530

Hi,

I would like to use cpufreq driver for dynamic frequency scaling on OMAP3530 EVM. The thing is current cpufreq driver only support the scaling between 5 consecutive frequency values which related to OPPs. I wish that I can have more choice of frequencies or, if possible, arbitrary frequency values.

It might be somewhere in the kernel source code or which defined such property and might need to be modified, but I didn't find it. I'm new to kernel source. Could anyone tell me what to do? Thanks in advance!

Rico

  • 0
    TI__Genius 15100 points

    Hi,

    Can you post this on the OMAP forum?

     

    Thank you.

    Gandhar.

     

  • 0
    TI__Expert 4590 points

    Rico,

    The silicon is verified for these OPPs. Hence, the cpufreq uses these OPPs only. You would want to consider the relationship between the ARM and IVA2 frequencies, and related issues e.g. SmartReflex cofficients for a non-standard OPP.

    Also, what is the driving need for changing to arbitrary frequencies?

    Still, to make changes, you need to look at the definition of OPP tables; You can add new OPPs for more choices.