Re: [PATCH v5 1/4] PM / OPP: Support adjusting OPP voltages at runtime

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 16-10-19, 16:57, Sylwester Nawrocki wrote:
> From: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> 
> On some SoCs the Adaptive Voltage Scaling (AVS) technique is
> employed to optimize the operating voltage of a device. At a
> given frequency, the hardware monitors dynamic factors and either
> makes a suggestion for how much to adjust a voltage for the
> current frequency, or it automatically adjusts the voltage
> without software intervention. Add an API to the OPP library for
> the former case, so that AVS type devices can update the voltages
> for an OPP when the hardware determines the voltage should
> change. The assumption is that drivers like CPUfreq or devfreq
> will register for the OPP notifiers and adjust the voltage
> according to suggestions that AVS makes.
> 
> This patch is derived from [1] submitted by Stephen.
> [1] https://lore.kernel.org/patchwork/patch/599279/
> 
> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> Signed-off-by: Roger Lu <roger.lu@xxxxxxxxxxxx>
> [s.nawrocki@xxxxxxxxxxx: added handling of OPP min/max voltage]
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> ---
>  drivers/opp/core.c     | 69 ++++++++++++++++++++++++++++++++++++++++++
>  include/linux/pm_opp.h | 13 ++++++++
>  2 files changed, 82 insertions(+)

Applied. Thanks.

-- 
viresh



[Index of Archives]     [Linux SoC Development]     [Linux Rockchip Development]     [Linux for Synopsys ARC Processors]    
  • [Linux on Unisoc (RDA Micro) SoCs]     [Linux Actions SoC]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Linux SCSI]     [Yosemite News]

  •   Powered by Linux