linux-kernel - Re: [PATCH v2 1/2] regulator: tps6507x: allow driver to use DEFDCDC{2,3}

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Message-ID: <20100712122835.GB22701@rakim.wolfsonmicro.main>
Date:	Mon, 12 Jul 2010 13:28:35 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Sekhar Nori <nsekhar@...com>
Cc:	linux-kernel@...r.kernel.org,
	davinci-linux-open-source@...ux.davincidsp.com,
	Anuj Aggarwal <anuj.aggarwal@...com>,
	Liam Girdwood <lrg@...mlogic.co.uk>
Subject: Re: [PATCH v2 1/2] regulator: tps6507x: allow driver to use
 DEFDCDC{2,3}_HIGH register

On Mon, Jul 12, 2010 at 05:54:06PM +0530, Sekhar Nori wrote:
> From: Anuj Aggarwal <anuj.aggarwal@...com>
> 
> In TPS6507x, depending on the status of DEFDCDC{2,3} pin either
> DEFDCDC{2,3}_LOW or DEFDCDC{2,3}_HIGH register needs to be read or
> programmed to change the output voltage.
> 
> The current driver assumes DEFDCDC{2,3} pins are always tied low
> and thus operates only on DEFDCDC{2,3}_LOW register. This need
> not always be the case (as is found on OMAP-L138 EVM).
> 
> Unfortunately, software cannot read the status of DEFDCDC{2,3} pins.
> So, this information is passed through platform data depending on
> how the board is wired.
> 
> Signed-off-by: Anuj Aggarwal <anuj.aggarwal@...com>
> Signed-off-by: Sekhar Nori <nsekhar@...com>

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