Updated driver description comments

Change-Id: I0bccce3b1c7698d49e14e2557e15c7622b88f284
Added input event loggin code

Change-Id: I73b70030caaee88a940404b92d090b72e0fa7b31
Fixed wrong function call at module_exit().

Change-Id: I49252f470192df95b2bf11c26dbed0ea2837483f