linux-kernel - Re: [PATCH 1/2] Documentation/gpio.txt: Explain expected pinctrl interaction

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Date:	Mon, 12 Mar 2012 10:32:12 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Linus Walleij <linus.walleij@...aro.org>,
	Stephen Warren <swarren@...dia.com>
Cc:	Linus Walleij <linus.walleij@...ricsson.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	Olof Johansson <olof@...om.net>,
	Colin Cross <ccross@...roid.com>, Chris Ball <cjb@...top.org>,
	linux-doc@...r.kernel.org, linux-mmc@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] Documentation/gpio.txt: Explain expected pinctrl interaction

On Tue, 21 Feb 2012 11:46:03 +0100, Linus Walleij <linus.walleij@...aro.org> wrote:
> On Mon, Feb 20, 2012 at 7:27 AM, Stephen Warren <swarren@...dia.com> wrote:
> 
> > Update gpio.txt based on recent discussions regarding interaction with the
> > pinctrl subsystem.
> >
> > Previously, gpio_request() was described as explicitly not performing any
> > required mux setup operations etc.
> >
> > Now, gpio_request() is explicitly as explicitly performing any required mux
> > setup operations where possible. In the case it isn't, platform code is
> > required to have set up any required muxing or other configuration prior to
> > gpio_request() being called, in order to maintain the same semantics.
> >
> > This is achieved by gpiolib drivers calling e.g. pinctrl_request_gpio() in
> > their .request() operation.
> >
> > Signed-off-by: Stephen Warren <swarren@...dia.com>
> 
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
> 
> Grant can you take this one? I'd prefer for you to have a look at
> it as well.

I've taken this one, but left the 2nd for Olof.

g.

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