On Thu, Nov 29, 2012 at 10:35:35AM +0530, Naveen Krishna Chatradhi wrote:

The arbitrator is a general purpose function which uses two GPIOs to
communicate with another device to claim/release a bus. We use it to
arbitrate an i2c port between the AP and the EC.

Should this not be layerd on top of the I2C controller rather than part
of the controller driver?  It doesn't seem terribly controller specific.