ehci-msm2: Add wakeup gpio support for out of band remote wakeup

Some peripherals can connect directly to USB controller's root hub
but do not support remote wakeup signaling to wake up the host
controller when the bus is suspended. Such peripherals can be
configured to use GPIOs instead. Register wakeup gpio irq to
handle out of band remote wake up.

Change-Id: I0f6c8b5795a5ea5d47042c380708819986aaeb4c
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
1 file changed