[U-Boot] [RFC 3/5] CAN device driver for the SJA1000

[Matthias Fuchs <matthias.fuchs@esd.eu>]

Hi Wolfgang,

of course I can think of situations where some simple CAN mechanism
might be helpful (e.g. simple hardware testing). 

But do we really need this inside a bootloader? Surely not
for a production build. But please keep on hacking!

On Monday 02 November 2009 13:50, Wolfgang Grandegger wrote:
> Matthias Fuchs wrote:
> > Hi Wolfgang,
> > 
> > this patch conflicts with my simple SJA header posted some days ago
> > 
> > http://lists.denx.de/pipermail/u-boot/2009-October/063097.html
> > 
> > together with a fix for two of our boards - which has not much
> > to do with CAN. WD asked me to use a C struct to access the SJA1000. 
> > 
> > http://lists.denx.de/pipermail/u-boot/2009-October/062902.html
> > 
> > So where does this bring us? Either we want to use C structs for everything
> > or decide it from patch to patch :-(
> 
> Then it should be changed, of course. This patch is far from being
> accepted and for the moment it's an implementation detail. I'm
> especially interested to hear if such a generic CAN interface would
> serve your purposes as well, as you require access to the SJA1000 somehow.

I just need to bit bang around in the OCR register. So no need for a full blown
and flash consuming CAN implementation. Of course I could life with your
register access style. Especially because it makes the code more common with
Socket-CAN files which prevents us from rewriting fully functional code ;-)

Matthias