From: Steven Miao <realmz6@gmail.com>
Date: Thu, 5 May 2011 06:14:48 +0000 (+0800)
Subject: Blackfin: work around anomaly 05000480
X-Git-Tag: v3.0-rc1~154^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9691bb9674b6822ace56370a08c6fc02addf6cb;p=pandora-kernel.git

Blackfin: work around anomaly 05000480

Anomaly 05000480 on BF537 rev 0.0, 0.1, 0.2:
Multiple Simultaneous Urgent DMA Requests May Cause DMA System Instability

Suggested Workaround:
Program the DMA Traffic Control Period to a non-zero value.  This forces
the DMA block to group accesses together rather than allow arbitration for
each piece of data placed on the internal DMA bus.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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