linux-kernel - Re: [PATCH 02/10] mach-u300: rewrite gpio driver, move to drivers/gpio

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Message-ID: <20110520015022.GA3095@pulham.picochip.com>
Date:	Fri, 20 May 2011 02:50:22 +0100
From:	Jamie Iles <jamie@...ieiles.com>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
Cc:	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawn.guo@...escale.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Jonas Aaberg <jonas.aberg@...ricsson.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Lee Jones <lee.jones@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Jamie Iles <jamie@...ieiles.com>
Subject: Re: [PATCH 02/10] mach-u300: rewrite gpio driver, move to
 drivers/gpio

On Thu, May 19, 2011 at 04:18:56PM -0500, H Hartley Sweeten wrote:
> On Thursday, May 19, 2011 12:12 PM, Sascha Hauer wrote:
> > On Thu, May 19, 2011 at 09:56:32PM +0800, Shawn Guo wrote:
> >> On Thu, May 19, 2011 at 02:21:27PM +0200, Linus Walleij wrote:
> >>> On Thu, May 19, 2011 at 10:56 AM, Shawn Guo <shawn.guo@...escale.com> wrote:
> >>> 
> >>>> I start working on moving mxs gpio (arch/arm/mach-mxs/gpio.c) into
> >>>> driver/gpio, and I see the possibility to go a different approach
> >>>> from U300 one posted here.
> >>> 
> >>> I've tried to figure out what relation the mail has to the U300 driver
> >>> but cannot find any, more than that it's moving a driver... Please
> >>> start a new mail thread.
> >>> 
> >> I will post mxs-gpio driver once I get it done.  Then please review
> >> the code and see the difference between mxs-gpio and u300-gpio,
> >> though these hardwares have something in common.
> >
> > I'm pretty sure they have something in common and even more that *all*
> > gpio drivers have something in common. I wonder if it really makes sense
> > to move the gpio driver to drivers/gpio without creating a common
> > mmio_gpio_chip beforehand. This can't be very hard.
> 
> Jamie Iles (cc'ed) posted some patches that extended the basic_mmio_gpio
> driver so that it could be used as a library by other gpio drivers.
> 
> Jamie, could you re-post that series to the linux-arm-kernel list for
> review?

Grant has applied these patches but I've put them in a public branch if 
that's OK rather than reposting:

	git://github.com/jamieiles/linux-2.6-ji.git gpio

Jamie
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