On 11-05-22, 15:45, 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.
>
> Signed-off-by: Pierre Gondois <pierre.gondois@xxxxxxx>
> ---
> drivers/acpi/cppc_acpi.c | 17 +++++++++++++++++
> drivers/cpufreq/cppc_cpufreq.c | 24 ++++++++++++++++++++++++
> include/acpi/cppc_acpi.h | 5 +++++
> 3 files changed, 46 insertions(+)
Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
--
viresh
