BTN_TOUCH
evdev_support_key(evdev, BTN_TOUCH);
evdev_send_event(evdev, EV_KEY, BTN_TOUCH, nfingers > 0);
evdev_support_key(evdev_a, BTN_TOUCH);
evdev_support_key(evdev_a, BTN_TOUCH);
evdev_push_key(sc->evdev_a, BTN_TOUCH, nfingers > 0);
evdev_push_key(sc->evdev_a, BTN_TOUCH, nfingers > 0);