commit 30091404af5a7cd515e7b565df76932e295d8f6f
author David Miller <davem@davemloft.net> Wed Oct 22 20:21:30 2008 +0200
committer Jean Delvare <khali@linux-fr.org> Wed Oct 22 20:21:30 2008 +0200
tree 6ce6ecb5707aca55aff260ff3a1ce8a3453be3de
parent 08e5338d119daeb3c7746fa80fa916b8d3d48e89

i2c-algo-pcf: Add adapter hooks around xfer begin and end

Some I2C bus implementations need to synchronize with external
entities, such as system firmware, which might also be programming the
same I2C bus.

In order to facilitate this add ->xfer_begin() and ->xfer_end() hooks
which are invoked around pcf_xfer().

[JD: Make these hooks optional.]

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>