linux-kernel - Re: [PATCH v2 0/5] Support CPR on MSM8916

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Message-ID: <20150928184836.GN23081@codeaurora.org>
Date:	Mon, 28 Sep 2015 11:48:36 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Nishanth Menon <nm@...com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Andy Gross <agross@...eaurora.org>, linux-pm@...r.kernel.org,
	Mark Brown <broonie@...nel.org>,
	David Collins <collinsd@...eaurora.org>
Subject: Re: [PATCH v2 0/5] Support CPR on MSM8916

On 09/26, Rafael J. Wysocki wrote:
> On Friday, September 18, 2015 05:52:04 PM Stephen Boyd wrote:
> > This patch series adds support for CPR on MSM8916. The first
> > patch exposes a corner voting API to the CPR driver so that we can
> > change the corner for the MX regulator. If possible I would
> > like to make this patch prettier, but I don't have any great
> > ideas right now. The next patch adds support to adjust voltages in the OPP
> > layer, and then hooks that up to cpufreq-dt so that we can adjust
> > the voltage in response to what CPR tells us to do. I've also thrown
> > in a patch to make RCU lockdep warnings go away, but I'm not sure if it's
> > right. There's still work to do.
> > 
> > The final patch adds the CPR driver. This still has some rough edges. With
> > the OPPv2 bindings I'm thinking of moving the frequency tables into DT
> > and adding a custom vendor property to describe which fuse corner to use for
> > each frequency.
> > 
> > Once you have these patches in place along with a CPU clock driver you
> > can eanble enable cpufreq-dt and add the cpufreq-dt device (maybe the
> > CPR driver should add the cpufreq-dt device?) and you'll see interrupts
> > for CPR and OPP voltage adjustments triggering CPUfreq to modify voltages.
> > 
> > Andy Gross (1):
> >   regulator: smd: Add floor and corner operations
> > 
> > Stephen Boyd (4):
> >   PM / OPP: Support adjusting OPP voltages at runtime
> >   OPP: Allow notifiers to call dev_pm_opp_get_{voltage,freq} RCU-free
> >   cpufreq-dt: Handle OPP voltage adjust events
> >   power: avs: Add support for CPR (Core Power Reduction)
> 
> From the responses so far I gather there will be a v3?
> 

Yes. Definitely.

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