Now hack is not dirty, just found that driver has native implementation of "sleep".
Result: 15-30% cpu use with tap down.
Included all tweaks from GNM OC Kernel.
Packaged in koush's anykernel for compatibility with any rom.
Do not forget to make nandroid backup first.
Probably fixed "scroll bug".
v1.1: added pressure sensitivity (works correctly only for single touch because of our touchscreen).