Re: [PATCH] New AT91 MCI Driver that supports both MCI slots used at the same time

Joey Oravec
2009-06-03T15:45:25Z

Nicolas Ferre wrote:
> This systematic reset was remove by Haavard with this comment:
> "Also, don't reset the controller between each transfer. That was an
> attempt to work around earlier bugs, and it never really worked very
> well."
>
See:
http://lists.arm.linux.org.uk/lurker/message/20090409.120542.4f74c08d.en.html

I disagree with Haavard. Without the reset my sam9261 would exhibit DAT0
contention, early interrupts, and other problems. Adding the reset was a
major improvement. I emailed you some screenshots on April 10 2009 that
demonstrate my testing. Let me know offline if either you or Havaard did
not get the email and I can resend.

Maybe the problems are limited to this chip? We should discuss this further.

-joey