| commit | f9691bb9674b6822ace56370a08c6fc02addf6cb | |
| author | Steven Miao <realmz6@gmail.com> | |
| Thu, 5 May 2011 06:14:48 +0000 (5 14:14 +0800) | ||
| committer | Mike Frysinger <vapier@gentoo.org> | |
| Wed, 25 May 2011 12:24:14 +0000 (25 08:24 -0400) | ||
| tree | 40f9f39d38326c498ea5f3d63cd2c1e059b8bf21 | treesnapshot (tar.gz zip) |
| parent | 7a7a430f7498cd55820232d8e3f144161138f91a | commitdiff |
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>
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>
| arch/blackfin/kernel/bfin_dma_5xx.c | diffblobblamehistory |