[Linaro-open-discussions] Linaro : Meeting : Linux Kernel Discussion : Wednesday Meeting notes

Viresh Kumar viresh.kumar at linaro.org
Tue Nov 17 04:21:01 UTC 2020


On 13-11-20, 10:02, Ulf Hansson wrote:
> + Viresh
> 
> Hi Hanjun,
> 
> On Thu, 12 Nov 2020 at 02:32, Hanjun Guo <guohanjun at huawei.com> wrote:
> >
> > Hi Ulf,
> >
> > Sorry for the late reply, please see my comments inline.
> >
> > On 2020/11/6 22:37, Ulf Hansson via Linaro-open-discussions wrote:
> > > On Fri, 6 Nov 2020 at 09:53, Mike Holmes via Linaro-open-discussions
> > > <linaro-open-discussions at op-lists.linaro.org>  wrote:
> > >> All
> > >>
> > >> Thanks for a good discussion yesterday, Hanjun's Unconre DVFS slides are
> > >> now attached to the notes at
> > >> https://collaborate.linaro.org/display/LOD/2020-11-04+Meeting+Meeting+notes
> > > Just to make sure people know about it...
> > >
> > > For DT based platforms we have recently enabled a generic solution in
> > > the Linux kernel to support DVFS. From a top level point of view, it
> > > consists of letting a power-domain provider act as the backend driver
> > > for changing the performance state (voltage/frequency). The mapping of
> > > what state to select, is done through OPP tables.
> > >
> > > I am not an expert of ACPI specifications, but perhaps the DT bindings
> > > can be used as inspiration for what is missing!?
> >
> > Could you point me to the patches or documentation?
> 
> In the kernel git these DT docs should be the most important, I think:
> 
> Documentation/devicetree/bindings/power/power-domain.yaml
> Documentation/devicetree/bindings/power/power_domain.txt
> Documentation/devicetree/bindings/opp/opp.txt

That's all what I have as well.

> I have looped in Viresh, maybe he has some additional OPP docs to point to?


-- 
viresh


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