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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