说明：  基于S3C2440的四线电阻式触摸屏驱动程序，linux2.6.22内核。把touchscreen.c放在driver/input/touchscreen/下。修改arch/arm/mach-s3c2440/mach-smdk2440.c以及相应的Makefile加上驱动即可
(S3C2440 based on the four-wire resistive touch screen driver, linux2.6.22 core. Touchscreen.c on the driver/input/touchscreen/under. Arch/arm/mach-s3c2440/mach-smdk2440.c modify Makefile and the corresponding drive can be coupled with)