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Date: Fri, 14 Dec 2012 11:46:28 +0900 From: Mark Brown <broonie@...nsource.wolfsonmicro.com> To: Lee Jones <lee.jones@...aro.org> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, arnd@...db.de, linus.walleij@...ricsson.com, ulf.hansson@...aro.org Subject: Re: [PATCH 02/12] regulator: gpio-regulator: Only read GPIO [dis|en]able pin if not always-on On Thu, Dec 13, 2012 at 11:48:18AM +0000, Lee Jones wrote: > On Mon, 10 Dec 2012, Mark Brown wrote: > > On Mon, Dec 10, 2012 at 08:55:51AM +0000, Lee Jones wrote: > > > If a regulator is specified as always-on, then it can't have an > > > enable/disable pin, as it can't be turned off. > > Sometimes always on gets set for regulators which do have a physical > > control wired up - the control might exist for use in suspend mode for > > example. Is the ability to specify an enable pin causing a practical > > problem for systems? If it is we should fix that. > My logic is that there is no point in requesting a pin which can > disable a regulator that can't be disabled. Then we can follow > on from that logic and say that if a regulator is _not_ always on > this we _require_ a way to disable it, thus we insist on an enable > GPIO pin. > With me? No. Making the enable pin optional for always on regulators is fine, forbidding it is not - that won't work for things like the suspend case I mentioned. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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