K 10
svn:author
V 3
ian
K 8
svn:date
V 27
2017-09-11T02:50:24.275619Z
K 7
svn:log
V 760
MFC r320460, r320461, r320462, r320463:

If an i2c transfer ends due to error, issue a stop on the bus even if the
nostop option is set, if a start was issued.

Add iic_recover_bus(), a helper function that can be used by any i2c driver
which is able to manipulate the clock and data lines directly.
When an i2c bus is hung by a slave device stuck in the middle of a
transaction that didn't complete properly, this function manipulates the
clock and data lines in a sequence known to reliably reset slave devices.
The most common cause of a hung i2c bus is a system reboot in the middle of
an i2c transfer (so it doesnt' happen often, but now there is a way other
than power cycling to recover from it).

Add bus recovery handling to the imx5/imx6 i2c driver.

END