Wake up from suspend-mode on touchscreen

[kchandr7]

Platform: Embedded Linux
Device: 7 inch touchscreen with arm v7
Qt Version: 4.7.2

I currently have a QTimer configured to start every X seconds. And a SLOT which is signaled on timeout that has a system command: #
@system("echo mem > /sys/power/state");@

This puts my processor into deep sleep mode. The device is configured to wake up on a touchscreen event.
This is a very sloppy implementation of the touch screen wake/sleep. Ideally I would like to have suggestions to improve on this with the following capabilities.

I don't want the 'first' touch to be recorded on the device which is used to wake up the device.

I want to be able to check for touch events before I timeout.

Any help is appreciated!