源码地址: https://github.com/figozhang/runninglinuxkernel_4.0/tree/rlk_basic/rlk_lab/rlk_basic/chapter_5/lab1_simple_driver 编译并拷贝 同时编译用户程序 arm-linux-gnueabi-gcc test.c -o test --static

加载驱动 添加设备节点 mknod /dev/demo_drv c 252 0