linux-kernel - Re: [PATCH] pinctrl: tegra: add suspend-resume support

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Date:	Wed, 3 Apr 2013 16:09:09 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Bibek Basu <bbasu@...dia.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Pritesh Raithatha <praithatha@...dia.com>
Subject: Re: [PATCH] pinctrl: tegra: add suspend-resume support

On Thu, Mar 28, 2013 at 6:48 PM, Stephen Warren <swarren@...dotorg.org> wrote:

> Why can't we just use the device suspend/resume functions rather than
> global (syscore) suspend/resume functions? Presumably this is to ensure
> that all other drivers suspend first, then the pinctrl driver does, and
> the reverse for resume. Can't we rely on deferred probe to ensure that
> instead?
>
> To make that work, we might need every affected driver to define a dummy
> pinmux state in DT that references the pinctrl driver, to make sure they
> all get probed after the pinctrl driver.

Hm that reminds me of that policy change I suggested a while back to
do this instead of using hogs where possible.

It has the nice side-effect that when we inspect the debugfs info
all pins will be properly owned by respective consuming device.

Yours,
Linus Walleij
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