2.6.30支持多点触摸

#define ABS_MT_TOUCH_MAJOR0x30/* Major axis of touching ellipse */
#define ABS_MT_TOUCH_MINOR0x31/* Minor axis (omit if circular) */
#define ABS_MT_WIDTH_MAJOR0x32/* Major axis of approaching ellipse */
#define ABS_MT_WIDTH_MINOR0x33/* Minor axis (omit if circular) */
#define ABS_MT_ORIENTATION0x34/* Ellipse orientation */
#define ABS_MT_POSITION_X0x35/* Center X ellipse position */
#define ABS_MT_POSITION_Y0x36/* Center Y ellipse position */
#defin