on post-fs
    chown system system /sys/class/touchscreen/primary/double_tap_enabled
    chown system system /sys/class/touchscreen/primary/double_tap_pressed
    chown system system /sys/class/touchscreen/primary/udfps_enabled
    chown system system /sys/class/touchscreen/primary/udfps_pressed

    chown system system /sys/class/touchscreen/secondary/double_tap_enabled
    chown system system /sys/class/touchscreen/secondary/double_tap_pressed