]> err.no Git - linux-2.6/commit
i2c-piix4: Increase the intitial delay for the ServerWorks CSB5
authorDavid Milburn <dmilburn@redhat.com>
Sun, 11 May 2008 18:37:05 +0000 (20:37 +0200)
committerJean Delvare <khali@hyperion.delvare>
Sun, 11 May 2008 18:37:05 +0000 (20:37 +0200)
commitb1c1759cd192fe1d27989f986c7f6b2939905e0c
treebd8cc93f5ba349c39fb7cdcfbbdae627d8ece515
parentf5fff3602a67ff8c98fccdbf15959780be542802
i2c-piix4: Increase the intitial delay for the ServerWorks CSB5

Per the PIIX4 errata, there maybe a delay between setting the
start bit in the Smbus Host Controller Register and the transaction
actually starting. If the driver doesn't delay long enough, it
may appear that the transaction is complete when actually it
hasn't started, this may lead to bus collisions.

While 1 ms appears to be enough for most chips, the ServerWorks CSB5
wants 2 ms.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
drivers/i2c/busses/i2c-piix4.c