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 Thu, Oct 17, 2019 at 12:12:58PM +0530, Viresh Kumar wrote:
> 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.

Hi Viresh,

Can you provide a stable tag with this patch so I can take soc/samsung
driver?

Best regards,
Krzysztof




[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