Re: [PATCH] New AT91 MCI Driver that supports both MCI slots usedat the same time
From: Joey Oravec
Date: Wed Jun 03 2009 - 11:45:28 EST
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
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