On Thu, Feb 16, 2012 at 11:31:06PM +0100, Rafael J. Wysocki wrote: > Can you actually select what keys may wake up the system from sleep > (I mean "real sleep", when the whole system is entirely off except for wakeup > devices)? Yes, that's often possible. In suspend mode you can get a two stage process where the wakeup itself is triggered by simply looking for any electrical activity on a set of pins. This generates a wakeup and an interrupt for the keypad which then powers up the actual keypad circuit and looks to see what the keypress was. The Samsung keypad driver in mainline does this in runtime PM, while no key is pressed the keypad controller is in suspend mode.
Attachment:
signature.asc
Description: Digital signature
