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Date: Thu, 30 Nov 2006 07:57:52 +0100 From: "pHilipp Zabel" <philipp.zabel@...il.com> To: "David Brownell" <david-b@...bell.net> Cc: "Bill Gatliff" <bgat@...lgatliff.com>, "Paul Mundt" <lethal@...ux-sh.org>, "Linux Kernel list" <linux-kernel@...r.kernel.org>, "Andrew Morton" <akpm@...l.org>, "Andrew Victor" <andrew@...people.com>, "Haavard Skinnemoen" <hskinnemoen@...el.com>, jamey.hicks@...com, "Kevin Hilman" <khilman@...sta.com>, "Nicolas Pitre" <nico@....org>, "Russell King" <rmk@....linux.org.uk>, "Tony Lindgren" <tony@...mide.com> Subject: Re: [patch/rfc 2.6.19-rc5] arch-neutral GPIO calls Hi, On 11/23/06, David Brownell <david-b@...bell.net> wrote: > On Tuesday 21 November 2006 7:57 am, Bill Gatliff wrote: > > > Once you're hiding the GPIO number behind an enumeration, you can create > > a bitmap with more information than a single integer. That extra > > information could be used--- in my implementations, if any ever come > > about--- to store routing information. > > But none of the existing GPIO users do that. The goal wasn't to define > a new notion of GPIO; it was collecting the existing ones under a single > arch-neutral umbrella. > > > > >It'd also be a big (and needless) disruption to code that's been working > > >fine for several years now ... > > > > ... all of which is using the current GPIO API, you mean? :) > > Effectively, yes. I counted quite a few implementations in the current > tree which can trivially (#defines) map to that API. I tried to do that for pxa, the patch is attached. So what is the state of this discussion, now that 2.6.19 is here? I just submitted an input driver for GPIO buttons to linux-input that we use in the handhelds.org kernel for sa1100, pxa and s3c2410 archs. It needs some ugly #ifdefs currently, but with common GPIO calls they all could go away. regards Philipp - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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