From: Viresh Kumar <viresh.kumar-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: Sudeep Holla <sudeep.holla-5wv7dgnIgG8@public.gmane.org>
Cc: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Rafael Wysocki <rjw-LthD3rsA81gm4RdzfppkhA@public.gmane.org>,
ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
Kevin Hilman <khilman-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Viresh Kumar <vireshk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Nishanth Menon <nm-l0cyMroinI0@public.gmane.org>,
Stephen Boyd <sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
linaro-kernel-cunTk1MwBs8s++Sfvej+rw@public.gmane.org,
linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Vincent Guittot
<vincent.guittot-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
lina.iyer-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
rnayak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH V6 1/9] PM / OPP: Introduce "power-domain-opp" property
Date: Tue, 9 May 2017 10:59:21 +0530 [thread overview]
Message-ID: <20170509052921.GA15657@vireshk-i7> (raw)
In-Reply-To: <c2651a3c-befd-9288-37ce-2c60afb7a0e2-5wv7dgnIgG8@public.gmane.org>
On 08-05-17, 14:57, Sudeep Holla wrote:
> Yes, I followed the thread and figured that out. But Rajendra also
> raised "What if the microcontroller firmware maps the performance-index
> to voltage but expects linux to scale the frequency? There is no way to
> specify a performance-index *and* a frequency for a OPP now I guess? So
> this needs to be addressd now IIUC.
No, he misunderstood it. He was saying that the domain needs a performance-index
and the device needs freq-scaling, how do we do that? He thought that there will
be just one OPP table for the device here, but we will actually have two and
that would work.
> So as Kevin pointed out, we need to experiment and look at all
> possibilities before finalizing the bindings. Better to have examples
> for all these and describe how bindings are be used including how to
> distinguish between these use-case from the bindings if it's not implicit.
Yeah, I have some doubts on how we are going to implement that and looking for
more input from him.
--
viresh
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next prev parent reply other threads:[~2017-05-09 5:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1493203884.git.viresh.kumar@linaro.org>
[not found] ` <cover.1493203884.git.viresh.kumar-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2017-04-26 10:57 ` [PATCH V6 1/9] PM / OPP: Introduce "power-domain-opp" property Viresh Kumar
[not found] ` <025acedb263eaa6089d354d9630214ada8013990.1493203884.git.viresh.kumar-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2017-04-28 20:48 ` Rob Herring
2017-05-03 11:29 ` Sudeep Holla
2017-05-06 9:39 ` Kevin Hilman
[not found] ` <m2mvaquxxf.fsf-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
2017-05-08 13:47 ` Sudeep Holla
2017-05-08 7:13 ` Viresh Kumar
2017-05-08 13:57 ` Sudeep Holla
[not found] ` <c2651a3c-befd-9288-37ce-2c60afb7a0e2-5wv7dgnIgG8@public.gmane.org>
2017-05-09 5:29 ` Viresh Kumar [this message]
2017-05-06 9:58 ` Kevin Hilman
2017-05-08 4:15 ` Viresh Kumar
2017-05-08 5:36 ` Rajendra Nayak
[not found] ` <fd54a7b8-d88f-af70-61a2-f32befac21be-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2017-05-08 7:11 ` Viresh Kumar
2017-05-12 14:59 ` Kevin Hilman
2017-05-12 16:18 ` Viresh Kumar
2017-04-26 10:57 ` [PATCH V6 2/9] PM / Domains: Allow OPP table to be used for power-domains Viresh Kumar
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