b7d271df873c5121a4ca1c70dea126b5920ec2f1 - linux

commit	b7d271df873c5121a4ca1c70dea126b5920ec2f1	[log] [tgz]
author	Stefano Babic <sbabic@denx.de>	Mon Dec 01 13:13:53 2008 -0800
committer	Linus Torvalds <torvalds@linux-foundation.org>	Mon Dec 01 19:55:24 2008 -0800
tree	90274ea55692c718ce1e108619e369e34a945101
parent	aaacf4bb51b243875b203e6ff73b5047636b4efa [diff]

spi: mpc52xx_psc_spi chipselect bugfix

According to the manual the "tdfOnExit" flag must be set on the last byte
we want to send.  The PSC controller holds SS low until the flag is set.

However, the flag was set always on the last byte of the FIFO,
independently if it is the last byte of the transfer.  This generates
spurious toggling of the SS signals that breaks the protocol of some
peripherals.  Fix.

Signed-off-by: Stefano Babic <sbabic@denx.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
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>

drivers/spi/mpc52xx_psc_spi.c[diff]

1 file changed

tree: 90274ea55692c718ce1e108619e369e34a945101