linux-kernel - Re: [PATCH] mc13xxx-ts: use zero as default value if no pdata was defined

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Date:	Tue, 20 Aug 2013 11:34:32 +0200
From:	Michael Grzeschik <mgr@...gutronix.de>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	Michael Grzeschik <m.grzeschik@...gutronix.de>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel@...gutronix.de, Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: Re: [PATCH] mc13xxx-ts: use zero as default value if no pdata was
 defined

On Tue, Aug 20, 2013 at 03:34:33AM +0200, Samuel Ortiz wrote:
> Hi Michael,
> 
> On Tue, Aug 13, 2013 at 02:14:30PM +0200, Michael Grzeschik wrote:
> > In case of devicetree, we currently don't have a way to append pdata for
> > the touchscreen. The current approach is to bail out in that case.
> > This patch makes it possible to probe the touchscreen without pdata
> > and use zero as default values for the atox and ato adc conversion.
> Would that still make the touchscreen somehow functional ?

Yes, it still works. It just defaults to zero values in no pdata case.

> If that's the case, and if Dmitry is fine with the ts part of this
> patch, could you please separate the mfd part of this patch into a
> separate one ?

Why?

The purpose of this patch is to have both cases working, pdata and no
pdata. This patch is actually fixing the patch of Michael Thalmeier.
There we changed the mfd and touch in one patch as well.

http://lkml.indiana.edu/hypermail/linux/kernel/1201.1/01364.html

Thanks,
Michael

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