linux-kernel - Re: [PATCH] pinctrl: Add generic pinctrl-simple driver that supports omap2+ padconf

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Message-ID: <20120504220809.GW5613@atomide.com>
Date:	Fri, 4 May 2012 15:08:10 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-omap@...r.kernel.org, Stephen Warren <swarren@...dia.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] pinctrl: Add generic pinctrl-simple driver that
 supports omap2+ padconf

* Stephen Warren <swarren@...dotorg.org> [120504 11:59]:
> On 05/04/2012 10:34 AM, Tony Lindgren wrote:
> > * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com> [120504 08:58]:
> >> On 08:03 Fri 04 May     , Tony Lindgren wrote:
> >>>>
> >>>> so I was thinking to do like on gpio
> >>>>
> >>>> uart {
> >>>> 	pin = < &pioA 12 {pararms} >
> >>>>
> >>>> }
> >>>
> >>> Hmm I assume the "12" above the gpio number?
> >> no pin number in the bank because it could not be gpio
> > 
> > Yes OK, but pin number 12 in the gpio bank, not in the mux register.
> > Got it.
> 
> I'd prefer to avoid any references to GPIOs here; not all muxable pins
> are GPIOs and not all GPIOs are muxable pins. Lets keep the two concepts
> independent.

And it seems that &pioA 12 is not always enough information for the pinctrl
driver to request a GPIO. So it's best to specify it separately.

Regards,

Tony
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