linux-kernel - Re: [PATCH 05/17] mmc: mmci: Put the device into low power state at system suspend

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Message-ID: <20140205141358.GJ22609@sirena.org.uk>
Date:	Wed, 5 Feb 2014 14:13:58 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Kevin Hilman <khilman@...aro.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Alessandro Rubini <rubini@...pv.it>,
	Wolfram Sang <wsa@...-dreams.de>,
	Chris Ball <chris@...ntf.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
	linux-spi@...r.kernel.org,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH 05/17] mmc: mmci: Put the device into low power state at
 system suspend

On Wed, Feb 05, 2014 at 01:49:49PM +0100, Linus Walleij wrote:
> On Tue, Feb 4, 2014 at 8:22 PM, Kevin Hilman <khilman@...aro.org> wrote:

> > I'm trying to thing of a good reason to not make PM_SLEEP depend on
> > PM_RUNTIME for platforms like this.

> Isn't the typical Android platform using PM_SLEEP without using
> PM_RUNTIME?

No, not at all.  Android does make aggressive use of sleep but it's also
highly desirable to use runtime PM - for example you don't want to have
to power up the entire SoC simply because the system is getting a new
e-mail pushed to it or location updates, most of the hardware is doing
nothing.

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