problems running I2C and/or SPI on 857 board

Wolfgang Denk wd at
Tue Mar 26 21:29:45 EST 2002

In message <FCEAKDJJAPHPLJFINDAJEENDCDAA.Stephan.Linke at> you wrote:
> At the moment all my tries are based on the existing drivers in PPCBOOT.

Which version of PPCBoot? The official releases (1.1.5)  should  work
just fine; they do so on several tested systems.

If you're using the top of tree on the CVS server (i. e. the  version
which includes the "Grand Unifying I2C interface patch") you may have
to  adjust a couple of things; this is not that well tested / working

> Using no microcode patch, and DPRAM allocation.

I wonder why you use the CPM code at all.  I  always  found  it  much
easier to use CONFIG_SOFT_I2C ...

> DPRAM allocation pointed out a bug so I guess it's not that well tested yet
> :( .
> Trying fixed DPRAM offsets and microcode now...

Please submit a patch!

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at
The price of curiosity is a terminal experience.
                         - Terry Pratchett, _The Dark Side of the Sun_

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