On Wed, May 11, 2022 at 03:45:58PM +0200, Pierre Gondois wrote:
> From: Pierre Gondois <Pierre.Gondois@xxxxxxx>
>
> The communication mean of the _CPC desired performance can be
> PCC, System Memory, System IO, or Functional Fixed Hardware.
>
> commit b7898fda5bc7 ("cpufreq: Support for fast frequency switching")
> fast_switching is 'for switching CPU frequencies from interrupt
> context'.
> Writes to SystemMemory and SystemIo are fast and suitable this.
> This is not the case for PCC and might not be the case for FFH.
>
> Enable fast_switching for the cppc_cpufreq driver in above cases.
>
> Add cppc_allow_fast_switch() to check the desired performance
> register address space and set fast_switching accordingly.
>
Reviewed-by: Sudeep Holla <sudeep.holla@xxxxxxx>
--
Regards,
Sudeep
