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Date:	Sun, 20 Jan 2008 01:18:40 +0300
From:	Dmitry <>
Subject: Re: [PATCH] Core driver for WM97xx touchscreens


2008/1/20, Mark Brown <>:
> On Sat, Jan 19, 2008 at 10:48:32PM +0300, Dmitry wrote:
> > Well... It's a common suggestion not to duplicate code. The wm97xx bus
> > looks mostly like platform. The only difference is the name. To help
> > visualisation, devices can have parents. Just set (in pseudocode)
> > wm97xx-touchscreen->parent to wm97xx, do the same for wm97xx-battery
> > and so on. Thus all devices would be on the platform device but with
> > proper parent <-> child notation.
> That's exactly what I had understood you to mean.  I guess it's just
> that using the platform bus for this purpose feels like an abstraction
> violation to me due to having platform devices parented off a device on
> another bus.  Obviously it's just my model of a platform device that's
> wrong here.  I will change the driver to use the platform bus for my
> next submission.

Hmm. I forgot about rooting this onto ac97 bus. But I would still suggest
using platform bus just for the sake of code clarity and simplicity.

> > git:// Look for
> Thanks, I'll take a look.
> > 2008/1/19, Mark Brown <>:
> > > current patch series these chips all also provide an audio codec which
> > > requires a reasonably substantial driver for full support.
> > This would only touch child devices organisation.
> Indeed - I mention it mostly for additional motivation.

With best wishes
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