Double tap to wake optionality

Hello!

Most of touchscreens has ability to jump into low power mode and get woken up by 
gesture (such as double tap).

I wonder about suggestion what property should drivers use to implement this 
policy where driver doesn't have to jump into low-power mode but completely 
power-off (and save battery). My thinking was something such as

/sys/class/input/inputX/gesture_to_wake
(while gesture sounds a bit weird, it seems that TS are capable to recognize 
different patterns, not only double-tap).


                     userspace
                        │
                        │ gesture_to_wake = 1
                        ▼
               touchscreen driver
                        │
           ┌────────────┴────────────┐
           │                         │
        gesture ON               gesture OFF
           │                         │
           ▼                         ▼
    low-power TS mode          complete power-off
           │
           ▼
      IRQ configured
      as wake source


Thanks
David