linux-kernel - Re: [PATCH] mmc: move regulator handling to core

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Message-ID: <20100831110758.GD20849@rakim.wolfsonmicro.main>
Date:	Tue, 31 Aug 2010 12:07:58 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Linus Walleij <linus.ml.walleij@...il.com>
Cc:	Chris Ball <cjb@...top.org>, Daniel Mack <daniel@...aq.de>,
	linux-kernel@...r.kernel.org, Liam Girdwood <lrg@...mlogic.co.uk>,
	Pierre Ossman <pierre@...man.eu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matt Fleming <matt@...sole-pimps.org>,
	Adrian Hunter <adrian.hunter@...ia.com>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Eric Miao <eric.y.miao@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Cliff Brake <cbrake@...-systems.com>,
	Jarkko Lavinen <jarkko.lavinen@...ia.com>,
	Madhusudhan <madhu.cr@...com>, linux-mmc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] mmc: move regulator handling to core

On Sun, Aug 29, 2010 at 05:30:48PM +0200, Linus Walleij wrote:
> 2010/8/29 Mark Brown <broonie@...nsource.wolfsonmicro.com>:

> > This seems like the wrong approach; if there's a problem it'd seem much
> > better to fix the core code that everything is sharing rather than
> > factor it out - the location of the code is orthogonal to its
> > helpfulness.

> I actually did not move the essential regulator bits out just enable/disable,
> so that these were in the sites where the regulators were actually
> enabled/disabled in respective driver. That makes the internal
> regulator reference count do the trick.

I'm not sure what "the sites where the regulators were actually
enabled/disabled in respective driver" are but my understanding was that
there's a bit of an issue here in that the MMC core does not guarantee
balanced enable/disable calls.
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