diff options
author | Rini van Zetten <rini@arvoo.nl> | 2007-12-10 15:49:34 -0800 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-12-10 19:43:55 -0800 |
commit | d84248bf46582a406116c55b94405c05193773b1 (patch) | |
tree | eb27fdfc1ea343f2af847e1c93cc39386d0b4f45 /arch/sparc64/Makefile | |
parent | 6650e0a517bbfa1c47aa3da6b3562fcb1a066c63 (diff) |
atmel_spi: reload RCR before TCR
We have a wifi module connected to the spi bus and got sometimes FIFO
overrun errors on the spi bus.
After some investigation i found that the driver loads the TCR (transmit
count) register before the RCR (receive count). When the transfer list is
not empty the atmel_spi_next_message is called while tx and rx are enabled.
As soon as the TCR is loaded, hardware starts transfer and causes a rx
fifo overrun because the RCR is not loaded yet.
Load the RCR before the TCR. After this patch the fifo overrun disapears
at out setup.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Rini van Zetten <rini@arvoo.nl>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sparc64/Makefile')
0 files changed, 0 insertions, 0 deletions