linux-kernel - Re: [PATCH] gpio: Emma Mobile GPIO driver

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Date:	Tue, 15 May 2012 19:13:16 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Magnus Damm <magnus.damm@...il.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	linux-kernel@...r.kernel.org, rjw@...k.pl,
	linus.walleij@...ricsson.com, linux-sh@...r.kernel.org,
	horms@...ge.net.au, grant.likely@...retlab.ca, lethal@...ux-sh.org,
	olof@...om.net
Subject: Re: [PATCH] gpio: Emma Mobile GPIO driver

On Tuesday 15 May 2012, Magnus Damm wrote:
> >> > Isn't there a new nice inline that will both request and
> >> > remap a piece of memory?
> >>
> >> If so then that would be excellent. Especially together with
> >> ioread/iowrite so the code can work both for IOMEM and PORT
> >> transparently.
> >
> > We have a bunch of helpers, but I think none that does
> > everything yet. io_iomap() locates and remaps the resource.
> > devm_request_and_ioremap() does the request and the map, but
> > doesn't pull it out of the device.
> 
> Let me know if you see any reason for not doing that. I'd be happy to
> try to cook something up and convert my drivers one by one.

I think it would be good to have it, so I don't mind if you give it
a go, but I fear that a lot of people cna have conflicting ideas on
what the perfect interface looks like ;-)

	Arnd
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