linux-kernel - Re: [PATCH 1/4 resend] [x86] Add generic GPIO support to x86

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Date:	Thu, 25 Oct 2007 17:24:54 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Florian Fainelli <florian.fainelli@...ecomint.eu>
cc:	Andres Salomon <dilinger@...ued.net>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4 resend] [x86] Add generic GPIO support to x86

On Thu, 25 Oct 2007, Florian Fainelli wrote:
> > It might be useful for everyone to check, whether the existing GPIO
> > functionality can be extended, reworked to match the needs of Geode as
> > well. Extending / reworking an existing interface is definitely
> > better than adding a new incompatible one.
> 
> Of course. Just because Geode is the only x86 potential user of such an API 
> does not mean it should impose its design. Remember that this patch is part 
> of a serie to add support for the RDC R-321x SoC, which becomes another 
> x86-family user.
> 
> Looking at what Geode can do, and what RDC can do, I guess there are only few 
> functions that are generic, all the drain, multiplexing, direction things are 
> only available on the Geode board.

It does not matter whether Geode has 500 functions and RDC has 5. It
matters that we do _not_ want two different APIs which deal with the
same thing, where one can obviously be a subset of the other. So
either we can extend / rework the stuff that both parties are happy or
we are not going to merge either of them.

       tglx


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