Re: pxa2xx_spi suspend/resume

[Ned Forrester <nforrester-/d+BM93fTQY@public.gmane.org>]

Daniel Ribeiro wrote:
> Hello linux spi experts.
> 
> I'm trying to get suspend/resume working on my pxa27x board, but resume
> freezes waiting for SPI I/O.
> 
> After correcting suspend/resume ordering (i need MCI and UDC to resume
> after SPI, PMIC and USB transceiver on the SPI bus), it still freezes at
> the first SPI transfer.
> 
> I added some debug code to pxa2xx_spi.c as follows:

[snip]

> From my limited knowledge on this, it looks like there is no SSP
> peripheral clock after resume,  SSTO is not decremented after 200us.
> 
> Any pointer on how to fix this? Or other tests i should do?

I did not look your report carefully, but I wonder what kernel you are
using.  A patch for failure to re-enable the clock was merged in
pxa2xx_spi.c on 2008-05-13, which would have been released in kernel
version 2.6.26, I think.

-- 
Ned Forrester                                       nforrester-/d+BM93fTQY@public.gmane.org
Oceanographic Systems Lab                                  508-289-2226
Applied Ocean Physics and Engineering Dept.
Woods Hole Oceanographic Institution          Woods Hole, MA 02543, USA
http://www.whoi.edu/sbl/liteSite.do?litesiteid=7212
http://www.whoi.edu/hpb/Site.do?id=1532
http://www.whoi.edu/page.do?pid=10079


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