linux-kernel - Re: [linux-pm] [PATCH] opp: introduce library for device-specific OPPs

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Message-Id: <201009180052.21574.rjw@sisk.pl>
Date:	Sat, 18 Sep 2010 00:52:21 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Nishanth Menon <nm@...com>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	"linux-arm" <linux-arm-kernel@...ts.infradead.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Phil Carmody <ext-phil.2.carmody@...ia.com>,
	"linux-doc" <linux-doc@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	"Chikkature Rajashekar, Madhusudhan" <madhu.cr@...com>,
	"Aguirre, Sergio" <saaguirre@...com>,
	Andi Kleen <ak@...ux.intel.com>,
	"linux-pm" <linux-pm@...ts.linux-foundation.org>,
	Matthew Garrett <mjg@...hat.com>,
	Len Brown <len.brown@...el.com>,
	Eduardo Valentin <eduardo.valentin@...ia.com>,
	"linux-omap" <linux-omap@...r.kernel.org>,
	"Gopinath, Thara" <thara@...com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	"Granados Dorado, Roberto" <x0095451@...com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Romit Dasgupta <ro.mit@...com>,
	Tero Kristo <Tero.Kristo@...ia.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Premi, Sanjeev" <premi@...com>
Subject: Re: [linux-pm] [PATCH] opp: introduce library for device-specific OPPs

On Saturday, September 18, 2010, Nishanth Menon wrote:
> Rafael J. Wysocki had written, on 09/17/2010 05:22 PM, the following:
> > On Friday, September 17, 2010, Nishanth Menon wrote:
> >> Mark Brown had written, on 09/17/2010 10:36 AM, the following:
> >>> On Thu, Sep 16, 2010 at 08:29:33PM -0500, Nishanth Menon wrote:
> >>>
> >>>> +struct opp_def {
> >>>> +	unsigned long freq;
> >>>> +	unsigned long u_volt;
> >>>> +
> >>>> +	bool enabled;
> >>>> +};
> >>> It might be clearer to use some term other than enabled in the code -
> >>> when reading I wasn't immediately sure if enabled meant that it was
> >>> available to be selected or if it was the active operating point.  How
> >>> about 'allowed' (though I'm not 100% happy with that)?
> >> ;).. The opp is enabled or disabled if it is populated, it is implicit 
> >> as being available but not enabled- how about active? this would change 
> >> the opp_enable/disable functions to opp_activate, opp_deactivate..
> > 
> > Would that mean that "active" is the one currently in use?
> 
> I like the idea Phil pointed out[1] on using "available" instead.. 
> opp_enable and disable will make the OPP available or not. does this 
> sound better?

Yes, it does.

Rafael
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