linux-kernel - Re: [PATCH RFC] x86: Add user configurable GPIO-lib support

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Message-ID: <20080701111918.GA11809@elte.hu>
Date:	Tue, 1 Jul 2008 13:19:18 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Michael Buesch <mb@...sch.de>
Cc:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	linux-kernel <linux-kernel@...r.kernel.org>,
	florian.fainelli@...ecomint.eu,
	the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH RFC] x86: Add user configurable GPIO-lib support


* Michael Buesch <mb@...sch.de> wrote:

> > ... and thus perhaps your GPIO_USERSELECTION patch should move into 
> > drivers/ and be generally accessible, not special to x86?
> 
> Yes I'd really like to move it there, too. But currently that clashes 
> with architectures like MIPS, some PPC flavours and probably others 
> that implement their own GPIO API. We should have an 
> ARCH_IMPLEMENT_GPIO or whatever, but currently we don't seem to have 
> that.
> 
> So well. If it's desired to put the user selection into drivers/gpio 
> (which I'd really prefer), I can try to make a patch that adds 
> ARCH_IMPLEMENT_GPIO to every arch that implements their own GPIO API 
> and make GPIO_USERSELECTION depend on !ARCH_IMPLEMENT_GPIO.

or we could try it the other way around: stick 
ARCH_ALLOWS_TRULY_GENERAL_PURPOSE_INPUT_OUTPUT (note: please use a 
better name ;-) into x86, add the user text to drivers/ and let other 
architectures enable it too?

That way your commits would still be pretty focused (you'd avoid having 
to touch a lot of architectures) and it would still work all across the 
spectrum.

hm?

	Ingo
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