linux-kernel - Re: [PATCH] MMC: move regulator handling closer to core v3

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Message-ID: <20100909093810.GA1988@rakim.wolfsonmicro.main>
Date:	Thu, 9 Sep 2010 10:38:10 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Adrian Hunter <adrian.hunter@...ia.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Liam Girdwood <lrg@...mlogic.co.uk>,
	Tony Lindgren <tony@...mide.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Sundar Iyer <sundar.iyer@...ricsson.com>,
	Daniel Mack <daniel@...aq.de>,
	Pierre Ossman <pierre@...man.eu>,
	Matt Fleming <matt@...sole-pimps.org>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Eric Miao <eric.y.miao@...il.com>,
	Cliff Brake <cbrake@...-systems.com>,
	"Lavinen Jarkko (Nokia-MS/Helsinki)" <jarkko.lavinen@...ia.com>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] MMC: move regulator handling closer to core v3

On Thu, Sep 09, 2010 at 09:01:27AM +0300, Adrian Hunter wrote:

> As an aside, I would like to enhance the regulator framework to
> enable boards to hook their code directly into the regulator.

What do you mean when you say that you would like boards to "hook
directly into the regulator" - what do you want to be able to do?
Is this the notifiers?  Do you need more of them?

> Arguably this is essential to allow pbias configuration (without
> which the board may be damaged) so that regulator_enable/disable
> can be used independently of the board, or for example to allow

I can't parse this at all I'm afraid.  Could you be more specific about
what you mean by using enable and disable independantly of the board -
clearly the consumer drivers are already able to be board independant?

> the regulator core to turn the regulator on/off at initialisation.

The regulator core already supports enabling or disabling regulators
from the machine constraints which I *think* is what you're looking for
but since I can't follow what you're saying above I'm not sure.
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