linux-kernel - Re: [PATCH V2 2/5] PM / OPP: Add {opp-microvolt|opp-microamp|turbo-mode|opp-suspend}-<name> binding

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Message-ID: <CAL_JsqLtDi1V2vkJDcAHRRf1Nb05Xqc9euetLNeLoZqzOB0hqA@mail.gmail.com>
Date:	Tue, 10 Nov 2015 09:37:32 -0600
From:	Rob Herring <robh@...nel.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Rafael Wysocki <rjw@...ysocki.net>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Lee Jones <lee.jones@...aro.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, Nishanth Menon <nm@...com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	open list <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH V2 2/5] PM / OPP: Add {opp-microvolt|opp-microamp|turbo-mode|opp-suspend}-<name>
 binding

On Tue, Nov 10, 2015 at 8:55 AM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> On 06-11-15, 07:23, Viresh Kumar wrote:
>> Yeah, but in that case 1200 *may* not be a turbo frequency anymore, as
>> the voltage constraints might have changed.
>>
>> So turbo frequency is something that should be used only in small
>> bursts, as they are consume lot of power. They aren't available to be
>> used freely. They may also have thermal side effects..
>>
>> In a similar way, for suspend-freq, we may or may not want the lowest
>> frequency to be used during suspend and so that can change as well.
>> And we shouldn't have suspend-freq set for two OPP nodes.
>
> @Rob: Does my comments make any sense now? Or you still think we are
> doing something wrong here?

What you said could be possible, but I'm still doubtful. I would drop
these until you have an actual user.

Rob
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