linux-kernel - Re: [PATCH 4/4] regulator: mc13783-regulator: correct the probing time.

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Message-ID: <20091215145225.GA29034@rakim.wolfsonmicro.main>
Date:	Tue, 15 Dec 2009 14:52:25 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Alberto Panizzo <maramaopercheseimorto@...il.com>
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-arm-kernel-infradead <linux-arm-kernel@...ts.infradead.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Liam Girdwood <lrg@...mlogic.co.uk>,
	Sascha linux-arm <s.hauer@...gutronix.de>
Subject: Re: [PATCH 4/4] regulator: mc13783-regulator: correct the probing
 time.

On Mon, Dec 14, 2009 at 06:53:35PM +0100, Alberto Panizzo wrote:
> When the mc13783-regulator driver is built in kernel, probing it during
> the regulator subsystem initialisation result in a fault.
> 
> That is because regulator subsystem is planned to be initialised very early
> in the boot process, before the mfd subsystem initialisation.
> 
> The mc12783-regulator probing process need to access to the mc13783-core
> functionality to read/write mc13783 registers and so must be called after
> the mc13783-core driver initialisation.
> 
> The way to do this is to let the kernel probe the mc13783-regulator driver when 
> mc13783-core register his regulator subdevice.
> 
> Signed-off-by: Alberto Panizzo <maramaopercheseimorto@...il.com>

Acked-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
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