Hi ./include/linux/input/matrix_keypad.h there no help in matrix_keypad.h about active_low. I guess. when set active_low to 1.means: 0: key press 1: key not press right? thanks for help. -- Xiangfu Liu Email: xiangfu at qi-hardware dot com Web: http://www.qi-hardware.com -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html