Re: SPI support on OMAP

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, Apr 23, 2013 at 09:16:45PM +0200, Pierre Pronchery wrote:
>                       Hi port-arm,
> 
> I am trying to implement the SPI bus driver on OMAP, in order to
> implement the touchscreen driver on the Nokia N900 (TSC2005). I think I
> am getting close, but kind of stuck at the moment - I would therefore
> welcome feedback already.
> 
> During my latest tests I got the following error:
> === BEGIN PASTE ===
> panic: kernel diagnostic assertion "!cpu_intr_p()" failed: file
> ".../sys/kern/kern_condvar.c", line 142
> === END PASTE ===

this means you're trying to sleep in interrupt context.

> 
> I still have no functional keypad driver to obtain a backtrace, but I
> suppose this is triggered within spi_wait() whenever a transfer is
> started. I'll welcome an explanation of the issue here :/

You should be able to use this in your kernel config file:
options DDB_COMMANDONENTER="trace"

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--