linux-kernel - Re: [PATCH] ALSA: cs5535audio: only build OLPC support if MGEODE

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Date:	Thu, 13 Nov 2008 21:38:52 -0500
From:	Andres Salomon <dilinger@...ued.net>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Ingo Molnar <mingo@...e.hu>, Pavel Machek <pavel@...e.cz>,
	Jeremy Katz <katzj@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jordan Crouse <jordan.crouse@....com>,
	linux-kernel@...r.kernel.org, dsaxena@...top.org
Subject: Re: [PATCH] ALSA: cs5535audio: only build OLPC support if	MGEODE_LX
 is defined

On Fri, 14 Nov 2008 00:30:48 +0100
Takashi Iwai <tiwai@...e.de> wrote:

> At Thu, 13 Nov 2008 20:03:39 +0100,
> Ingo Molnar wrote:
> > 
> > 
> > * Andres Salomon <dilinger@...ued.net> wrote:
> > 
> > > On Thu, 13 Nov 2008 17:38:02 +0100
> > > Pavel Machek <pavel@...e.cz> wrote:
> > > 
> > > > On Thu 2008-11-13 11:14:28, Andres Salomon wrote:
> > > > > On Thu, 13 Nov 2008 16:54:19 +0100
> > > > > Takashi Iwai <tiwai@...e.de> wrote:
> > > > > 
> > > > > > At Thu, 13 Nov 2008 16:37:14 +0100,
> > > > > > Pavel Machek wrote:
> > > > > [...]
> > > > > > > 
> > > > > > > > IMO, the basic problem is rather that the platform and
> > > > > > > > the CPU selection is mixed up.  The geode GPIO stuff
> > > > > > > > shouldn't belong to CPU selection.
> > > > > > > 
> > > > > > > ACK... and suggested patch makes it worse.
> > > > > > > 
> > > > > > > There should be option 'support OLPC' somewhere, and that
> > > > > > > should enable the gpio bits. Alsa driver should depend on
> > > > > > > that one.
> > > > > > 
> > > > > > Any better fix patch is welcome, of course :)
> > > > > > This would make save a lot time than writing mails...
> > > > 
> > > > > 
> > > > > Okay, how about something like the following?
> > > > 
> > > > It is wrong. It is valid & useful to compile kernel for i386 and
> > > > expect all the features on OLPC (with small performance hit).
> > > 
> > > No one's debating that.  That requires additional work that will 
> > > take longer, however.
> > 
> > i've zapped this patch meanwhile:
> > 
> >  1355c96: x86/olpc: make CONFIG_OLPC dependent on CONFIG_MGEODE_LX
> > 
> > because it cripples the ability to run distribution kernels on the 
> > OLPC.
> 
> OK, I reverted also all relevant changes for cs5535audio driver now.
> The patches are saved in topic/cs5535audio branch, though.
> 
> Let's fix OLPC-geode coupling first.
> 


Hm, I'd really rather prefer this to be upstream.  The patch I sent adds
no regressions, allows the driver to happily coexist with existing
stuff, and *does* add support if you configure OLPC with MGEODE_LX
(generic kernels don't get the additional benefits, but those configured
specifically for OLPC do).

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