colibri PXA320 and UCB1400 - touch screen troubles

Yuri Ludkevich urx.forever at gmail.com
Wed Aug 11 08:32:55 EDT 2010


2010/8/11 Daniel Mack <daniel at caiaq.de>

> On Wed, Aug 11, 2010 at 03:10:08PM +0400, Yuri Ludkevich wrote:
> > 2010/8/11 Marek Vasut <marek.vasut at gmail.com>
> > > Dne St 11. srpna 2010 12:51:25 Daniel Mack napsal(a):
> > > > Good. Can you share a patch?
> > >
> > > nCS3 is the chipselect for CPLD space actually (and the EXT
> chipselects).
> > > If
> > > it's configured as nCS3, you can write to the CPLD, but in case you
> don't
> > > need
> > > PCMCIA (and ext. chipselects), you should be ok either way.
> > >
> > > And as Dan said, don't mix GPIO4 and GPIO4_2 :)
> > >
> > Yep. I know about CPLD. Our board do not use PCMCIA, only SD/MMC. So for
> us
> > it should work.
> >
> > But if someone wants to use both PCMCIA and touchscreen - how to
> configure
> > this GPIOs properly?
>
> It won't collide. GPIO4 should be configured to the application function
> nCS3, and GPIO4_2 is used as GPIO and interrupt input. The signals
> aren't shared on the die, and there are two seperate balls (pins) on the
> package.
>
> The only limitation is that you can't use them both as GPIOs, because
> GPIO register accesses for GPIO4_2 would also affect GPIO4, and
> vice-versa.
>
> And in the setup described above, you would just access GPIO4 and be
> fine.
>
> Daniel
>

Which list i should use to send patch?  linux-arm-kernel at lists.infradead.orgor
openpxa-users at lists.sourceforge.net? or both?

sorry for dumb question, but it my first expirience of sending patches =)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20100811/c8f48afd/attachment-0001.html>


More information about the linux-arm-kernel mailing list