Re: RE: How to use saa7134 gpio via gpio-sysfs?

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Hello Gordon,

Am Dienstag, den 19.01.2010, 10:24 -0700 schrieb Gordon Smith:
> On Mon, Jan 18, 2010 at 5:01 PM, hermann pitton <hermann-pitton@xxxxxxxx> wrote:
> > Hello,
> >
> > Am Montag, den 18.01.2010, 18:11 -0500 schrieb Will Tate:
> >> I'm not sure why access in userspace would be required.  I checked the
> >> schematic today and all the GPIO pins are used to communicate with the
> >> SAA6752HS on board for compression.  We do not bring the GPIO off the
> >> board anywhere.
> >
> > thank you very much. I was still expecting that and did not get Gordon's
> > point, but must admit to have been totally unaware about the DI/O
> > features. RTD did all the hardware implementations themselves.
> >
> > Very nice job that time.
> >
> >> Gordon and I have spoken previously about the RTD software for digital
> >> I/O breaking with the migration of pcf8574 driver to the pcf857x.  So,
> >> perhaps he intended to use GPIO until I can fix the digital I/O
> >> software.
> >
> > Ah, good to know. BTW, we had the mpeg encoder broken unnoticed for some
> > kernels, but due to fixes by Dmitri Belimov and extensions by Hans
> > Verkuil, we are much better on it these days. Enjoy.
> >
> > Always let us know, if we can do anything or at least make it public for
> > those interested to work on it.
> >
> > Thanks,
> > Hermann
> >
> 
> Hello Hermann, good to hear from you again.
> 
> It looks like I was off track regarding GPIO. In 2.6.30 the pcf8574
> module that was used for digital I/O earlier was no longer available
> and something I read lead me to believe I should use gpio-sysfs
> instead. I'm sorry for the noise.
> 
> - Gordon

no problem at all.

It was quite interesting to think about such gpio use.

If such a card appears in the future, we can point to the thread you
started here and have already, thanks to Trent, a collection of good
ideas and comments.

Cheers,
Hermann


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