i2c: davinci: bus recovery procedure to clear the bus

Browse source

Come out of i2c time out condition by following the
bus recovery procedure outlined in the i2c protocol v3 spec.
The kernel must be robust enough to gracefully recover
from i2c bus failure without having to reset the machine.
This is done by first NACKing the slave, pulsing the SCL
line 9 times and then sending the stop command.

This patch has been tested on a DM6446 and DM355

Signed-off-by: Philby John <pjohn@in.mvista.com>
Signed-off-by: Srinivasan, Nageswari <nageswari@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>

...

This commit is contained in:

Philby John 2010-01-11 22:39:44 +05:30 • committed by Kevin Hilman

parent 82c0de11b7

commit 8574faf9a5

1 changed files with 53 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

57

drivers/i2c/busses/i2c-davinci.c

View file