linux-kernel - Re: [PATCH] pinctrl: samsung: Allow pin value to be initialized using pinfunc.

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Message-ID: <CACRpkdZ7YCt7NvDDqgv6CZS07wkfVJ1NRZHFhqKxcYbdW7pXnQ@mail.gmail.com>
Date:	Mon, 9 Dec 2013 11:22:44 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	Kevin Bracey <kevin@...cey.fi>,
	Kyungmin Park <kmpark@...radead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	Heiko Stübner <heiko@...ech.de>,
	Stephen Warren <swarren@...dotorg.org>,
	Tomasz Figa <t.figa@...sung.com>,
	Doug Anderson <dianders@...omium.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH] pinctrl: samsung: Allow pin value to be initialized using pinfunc.

On Thu, Dec 5, 2013 at 4:07 PM, Mark Brown <broonie@...nel.org> wrote:
> On Tue, Dec 03, 2013 at 10:29:42AM +0100, Linus Walleij wrote:
>
>> So a suggested patch to support weak hogs would be interesting
>> to look at. Can you provide details on how you think this would
>> work?
>
> Or should we be going and applying the default state to all devices on
> init without worrying about a driver appearing?

That doesn't really work: if you have an unused device not in the
DT you usually mark it "disabled", and then the DT core doesn't
even create a platform_device for this node.

So doing this would involve parsing the tree and ... yuck.

Yours,
Linus Walleij
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