文章介绍了电阻式触摸屏的工作原理，给出了基于input子系统的触摸屏驱动设计的主要步骤，设计了在TQ2440硬件平台上基于input子系统的嵌入式Linux触摸屏驱动程序，并根据实验测试结果中存在的误差做了改进和优化，使驱动程序能处理长按、滑动，并具有较高的精度。

The paper introduces the principle of Resistance Touch Screen, main steps of touch panel driver designing based on input subsystem was given, Linux embedded touch panel driver based on input subsystem on the hardware platform of TQ2440 was designed, and according to error in experiment results, improvement and optimization were made to make the touch screen driver deal with pressing with long time and sliding, having higher precision.