i2c-cpm: Fix to takeback i2c bus master-ship after a collision

Browse source

In case of collision on i2c bus the controller which lost bus mastership
stays as a slave for all subsequent transfers. This results in the i2c
controller never writing to the bus for future transactions, resulting
in i2c transfer timeouts.
  This fix checks for a collision on last I2C transaction and sets the
I2COM_MASTER bit for the new transaction.

Signed-off-by: Sachin Surendran <sachin.surendran@alliedtelesis.co.nz>
Signed-off-by: Scott Wood <scottwood@freescale.com>

...

This commit is contained in:

Sachin Surendran 2012-11-26 11:20:01 +13:00 • committed by Scott Wood

parent 98c7355fb3

commit a16d8aa472

1 changed files with 8 additions and 0 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

8

drivers/i2c/busses/i2c-cpm.c

View file