summaryrefslogtreecommitdiff
path: root/CREDITS
diff options
context:
space:
mode:
authorClifford Wolf <clifford@clifford.at>2007-07-17 04:04:06 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-17 10:23:04 -0700
commit698ca47e8dba93f4b001b06b4c7037b09ac6eb09 (patch)
tree2e1f817e847d37b7397171d7fe15dc5ee0a79d07 /CREDITS
parent78961a5740374a8143f8fe120300f2ed160dd276 (diff)
spi_mpc83xx.c underclocking hotfix
The MPC83xx SPI controller clock divider can divide the system clock by not more then 1024. The spi_mpc83xx driver does not check this and silently writes garbage to the SPI controller registers when asked to run at lower frequencies. I've tried to run the SPI on a 266MHz MPC8349E with 100kHz for debugging a bus problem and suddenly was confronted with a 2nd problem to debug.. ;-) The patch adds an additional check which avoids writing garbage to the SPI controller registers and warn the user about it. This might help others to avoid simmilar problems. Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions