GPIO驱动，基于linux2.6.12，可以控制GPB口的功能切换。已通过测试-GPIO driver, based on linux2.6.12, can control the function of GPB port switch. Has been tested

1、开发环境linux2.6.362、交叉编译器gcc 4.2.33、本代码为s3c64xx GPIO驱动，代码中有完整的Makefile、Kconfig文件，和GPIO测试代码，可以和内核一起编译，方便移植。本代码已在飞凌嵌入式板子OK6410上测试通过。-(1) devolop enviroment base on linux 2.6.36 (2) cross compiler is gcc 4.2.3(3) this code is for s3c64xx GPIO driver, and