linux-kernel - Re: [RFC PATCH v3 2/5] pinctrl: add dt binding support for pinmux mappings

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Date:	Fri, 13 Jan 2012 14:48:29 +0100
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	Shawn Guo <shawn.guo@...aro.org>
Cc:	Dong Aisheng-B29396 <B29396@...escale.com>,
	Stephen Warren <swarren@...dia.com>,
	Dong Aisheng <dongas86@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"kernel@...gutronix.de" <kernel@...gutronix.de>,
	"cjb@...top.org" <cjb@...top.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"Simon Glass (sjg@...omium.org)" <sjg@...omium.org>
Subject: Re: [RFC PATCH v3 2/5] pinctrl: add dt binding support for pinmux
 mappings

On 01/13/2012 02:35 PM, Shawn Guo wrote:
> My guess is that Linus.W did not get any chance to take the dt case
> into account with his first design of pinctrl core.  But I guess he
> is open to any reasonable change to pinctrl core for dt adoption.
> Linus?

Any patches welcome.

However we cannot *require* DT for pinctrl to work, there
are archs that do not use DT and these must also be able
to use pinctrl. For example arch/blackfin have expressed
interest IIRC.

Then the question of whether to also support mixed configs
where some callers get data from DT and some from
platform data. I suspect that this is necessary for the
single kernel goal.

Yours,
Linus Walleij
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