input_dev->evbit[0] = BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS); input_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) | BIT_MASK(ABS_MT_TOUCH_MAJOR) | BIT_MASK(ABS_MT_WIDTH_MAJOR) | BIT_MASK(ABS_MT_POSITION_X) | BIT_MASK(ABS_MT_POSITION_Y) | BIT_MASK(ABS_MT_TRACKING_ID);
4、子系统上报