三个中的最后一个！
1、内核代码
①、bus.c
还是跟上面的文章的一样，我依旧粘贴！！
②、driver.c
#include <linux/device.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/init.h>#include <linux/string.h>MODULE_AUTHOR("_Justin");MODULE_LICENSE("GPL");extern struct bus_type my_bus_type;/* 驱动结构的 probe 和 remove 成员方法，分别会在驱动 * 匹配上总线上的对应设备和一处驱动时调用 */static int my_probe(struct device *dev){printk("[Driver found device which my driver can handle!]\n");return 0;}static int my_remove(struct device *dev){printk("[Driver found device unpluged!]\n");return 0;}struct device_driver my_driver ={.name = "my_dev",.bus = &my_bus_type,.probe = my_probe,.remove = my_remove,};/* 属性文件的读操作 */static ssize_t my_drv_show(struct device_driver *driver,char *buf){return sprintf(buf,"%s\n","This is a driver!");}/* 创建属性文件结构 */static DRIVER_ATTR(drv,S_IRUGO,my_drv_show,NULL);static int __init my_driver_init(void){int ret = 0;printk("[Call my_driver_init!]\n"); /* 注册驱动 */if(ret = driver_register(&my_driver))return ret;/* 创建属性文件 */ret = driver_create_file(&my_driver,&driver_attr_drv);return ret;}static void __exit my_driver_exit(void){printk("[Call my_driver_exit!]\n");driver_unregister(&my_driver);}module_init(my_driver_init);module_exit(my_driver_exit);
③、Makefile
ifneq ($(KERNELRELEASE),)obj-m := driver.oelseKDIR := /home/_Jana/linux-2.6.38all:make -C $(KDIR) M=$(PWD) modules ARCH=arm CROSS_COMPILE=arm-linux-clean:rm -f *.ko *.o *.mod.o *.mod.c *.symvers *.orderendif
2、测试结果
要铭记在心;每天都是一年中最美好的日子
