linux-kernel - Re: [PATCH 1/2] cs5535-gpio: add AMD CS5535/CS5536 GPIO driver support

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Message-ID: <20090611111610.0667898a@mycelium.queued.net>
Date:	Thu, 11 Jun 2009 11:16:10 -0400
From:	Andres Salomon <dilinger@...labora.co.uk>
To:	Tobias_Mueller@...m.info
Cc:	akpm@...ux-foundation.org, Randy Dunlap <randy.dunlap@...cle.com>,
	deepak@...top.org, Takashi Iwai <tiwai@...e.de>,
	linux-kernel@...r.kernel.org, linux-geode@...ts.infradead.org,
	jordan@...micpenguin.net, cjb@...top.org
Subject: Re: [PATCH 1/2] cs5535-gpio: add AMD CS5535/CS5536 GPIO driver  
 support

On Thu, 11 Jun 2009 16:46:35 +0200
Tobias Müller <Tobias_Mueller@...m.info> wrote:

> 2009/6/10 Andres Salomon <dilinger@...labora.co.uk>:
> > +config GPIO_CS5535
> > +       tristate "AMD CS5535/CS5536 GPIO support"
> > +       depends on PCI && !CS5535_GPIO && !MGEODE_LX
> > +       help
> > +         The AMD CS5535 and CS5536 southbridges support 28 GPIO
> > pins that
> > +         can be used for quite a number of things.  The CS5535/6
> > is found on
> > +         AMD Geode and Lemote Yeeloong devices.
> 
> Why do you depend on !MGEODE_LX? Are there any problems?

Because arch/x86/kernel/{mfgpt,geode}_32.c are built if
CONFIG_MGEODE_LX is set, and they will happily clobber each other.  We
need to get a broken-out mfgpt driver completed, and then we can rework
or remove the arch/x86/kernel/{mfgpt,geode}_32.c stuff.

It's probably possible to add a separate config for that
(CONFIG_GEODE_LEGACY or something?) rather than having it depend upon
CONFIG_MGEODE_LX, but I haven't looked into it.  I'd rather spend the
time fixing it correctly than fretting about with the various config
permutations. :)
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