linux-kernel - Re: [RFC V7 2/2] OPP: Allow "opp-hz" and "opp-microvolt" to contain magic values

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Date:   Thu, 2 Nov 2017 00:15:33 -0700
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Kevin Hilman <khilman@...nel.org>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Rafael Wysocki <rjw@...ysocki.net>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Sudeep Holla <sudeep.holla@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC V7 2/2] OPP: Allow "opp-hz" and "opp-microvolt" to contain
 magic values

On 11/02, Viresh Kumar wrote:
> On 01-11-17, 14:43, Stephen Boyd wrote:
> > On 11/01, Rob Herring wrote:
> > > On Tue, Oct 31, 2017 at 9:17 PM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> > > > On 31 October 2017 at 16:02, Rob Herring <robh+dt@...nel.org> wrote:
> > > >> Why not a new property for magic values? opp-magic? Don't we want to
> > > >> know when we have magic values?
> > > >
> > > > I have kept a separate property since beginning (domain-performance-state)
> > > > and moved to using these magic values in the existing field because of the
> > > > suggestion Kevin gave earlier.
> > > >
> > > > https://marc.info/?l=linux-kernel&m=149306082218001&w=2
> > > >
> > > > I am not sure what to do now :)
> > > 
> > > Okay, I guess reusing the properties is fine.
> > > 
> > 
> > We call them corners on qcom platforms. Any reason we can't keep
> > using that name? I'd rather not have to keep telling people that
> > these fake values in some misnamed property is actually a corner.
> 
> Surely not "corners", as these are platform and OS independent
> bindings we are talking about here. Even the kernel code shouldn't
> generally do that. Though your platform specific genpd driver can :)
> 

Sorry I'm not following. We're going to need to have platform
specific code that understands platform specific bindings that
aren't shoved into the generic OPP bindings.

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