struct input_mt_slot — represents the state of an input MT slot
struct input_mt_slot {
  int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
  unsigned int frame;
  unsigned int key;
};  holds current values of ABS_MT axes for this slot
last frame at which input_mt_report_slot_state was called
      
optional driver designation of this slot