linux-kernel - Re: [PATCH 0/2] RFC: gpio: driver-local pin configuration

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Message-ID: <BANLkTikpMdakfTU+RRsXQVnpO4-KGkOGJQ@mail.gmail.com>
Date:	Mon, 27 Jun 2011 14:37:32 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Stijn Devriendt <highguy@...il.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Lee Jones <lee.jones@...aro.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Kyungmin Park <kmpark@...radead.org>,
	Kurt Van Dijck <kurt.van.dijck@....be>,
	Ben Nizette <bn@...sdigital.com>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Rohit Vaswani <rvaswani@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	H Hartley Sweeten <hartleys@...ionengravers.com>
Subject: Re: [PATCH 0/2] RFC: gpio: driver-local pin configuration

On Mon, Jun 27, 2011 at 2:02 PM, Mark Brown
<broonie@...nsource.wolfsonmicro.com> wrote:
> On Mon, Jun 27, 2011 at 01:44:43PM +0200, Linus Walleij wrote:
>
>> Yes. To make the driver platform neutral, it needs to for example
>> provide a callback in the platform data like (* set_pin_bias) or so,
>> and then your platform has to implement this biasing.
>
>> In this specific case that kind of stuff would likely be preferable
>> to have in the platform anyway, but I understand what you mean.
>
> How about device tree usage?  I guess there we'd end up doing it by
> putting the configuration on the GPIO end of things rather than on the
> GPIO user side?

Sorry I can't quite understand that, please elaborate!

Thanks,
Linus Walleij
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