i2c-cpm: Fix to takeback i2c bus master-ship after a collision
authorSachin Surendran <sachin.surendran@alliedtelesis.co.nz>
Sun, 25 Nov 2012 22:20:01 +0000 (11:20 +1300)
committerScott Wood <scottwood@freescale.com>
Tue, 25 Jun 2013 21:53:26 +0000 (16:53 -0500)
commita16d8aa4726a944ffc1616689ae34ff6a902faba
tree383c8a010d1dc8a2a6a6bda0467f52507b91d9d7
parent98c7355fb373d7c29e5c45d0a423810ad2476b34
i2c-cpm: Fix to takeback i2c bus master-ship after a collision

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>
drivers/i2c/busses/i2c-cpm.c