linux-kernel - Re: [PATCH] i2c/tegra: I2C driver uses the suspend_noirq/resume

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Message-ID: <20110812031433.GE10218@opensource.wolfsonmicro.com>
Date:	Fri, 12 Aug 2011 12:14:35 +0900
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Colin Cross <ccross@...gle.com>
Cc:	Stephen Warren <swarren@...dia.com>,
	Ben Dooks <ben-linux@...ff.org>, Dilan Lee <dilee@...dia.com>,
	"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] i2c/tegra: I2C driver uses the suspend_noirq/resume_noirq

On Thu, Aug 11, 2011 at 07:59:27PM -0700, Colin Cross wrote:
> On Thu, Aug 11, 2011 at 5:45 PM, Mark Brown

> > For example with ASoC we'd sort all the components before the ASoC card
> > without regard for their bus dependencies or any other dependencies they
> > have (eg, their regulators). Since the ASoC card is a platform device
> > it's likely to have registered early with no regard for where the buses
> > the card needs are registered. I'd expect there's a reasonable chance
> > it'll actually make things worse in the short term.

> You can't just move everything after the card, you have to move
> everything after the last device that was probed, and it only works if
> nothing depends on any of the devices that are moved.

Sorry, I said that the wrong way round due to trying to reply quickly -
the card would be the thing that moves since that's the thing that
actually does the suspend but we've *no* idea which device we need to
move it after.  Since all the function does is a direct move after or
before a single device all we can do is pick one and pray that it's the
right device.
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