Date: Sat, 18 Aug 2012 14:12:16 +0200
From: Wolfram Sang <w.sang@pengutronix.de>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Laxman Dewangan <ldewangan@nvidia.com>, khali@linux-fr.org,
        swarren@nvidia.com, linux-i2c@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] i2c: tegra: Fix ifdefs for suspend mode
Message-ID: <20120818121216.GA12839@pengutronix.de>
References: <1343655187-18282-1-git-send-email-ldewangan@nvidia.com>
 <20120818070732.GA24639@pengutronix.de>
 <20120818120138.GD21888@opensource.wolfsonmicro.com>
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On Sat, Aug 18, 2012 at 01:01:38PM +0100, Mark Brown wrote:
> On Sat, Aug 18, 2012 at 09:07:32AM +0200, Wolfram Sang wrote:
> > On Mon, Jul 30, 2012 at 07:03:07PM +0530, Laxman Dewangan wrote:
> > > CONFIG_PM covers runtime only PM.
>=20
> > I am a bit confused by this description. CONFIG_PM_RUNTIME covers
> > runtime PM, no?
>=20
> The issue is that CONFIG_PM doesn't actually enable any of the PM
> callbacks, it only allows you to enable CONFIG_PM_SLEEP and
> CONFIG_PM_RUNTIME.  This means that if you use CONFIG_PM to protect your
> system sleep callbacks they may end up unreferenced if only runtime PM
> is enabled.

Thanks for the explanation!

Laxman, could you update the description to reflect that?

--=20
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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