#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/platform_device.h>

#define DRIVER_NAME "my_dev"

static int my_probe(struct device *dev)
{
    printk("driver found device !!\n");
    return 0;
}

static int my_remove(struct device *dev)
{
    printk("driver found device unpluged !!\n");
    return 0;
}

struct platform_driver my_driver={
    .probe=my_probe,
    .remove=my_remove,
    .driver={                    //platform_driver内嵌device_driver
            .owner=THIS_MODULE,
            .name =DRIVER_NAME,//最重要的是对name的赋值，因为在匹配的时候要用!!!!
    },
};

static int __init my_driver_init(void)
{    
    int ret =0;

    /*注册平台驱动*/
    ret=platform_driver_register(&my_driver);

    return ret;
}

static void __exit my_driver_exit(void)
{
    /*注销平台驱动*/
    platform_driver_unregister(&my_driver);
}

MODULE_AUTHOR("mhb@SEU");
MODULE_LICENSE("GPL");

module_init(my_driver_init);
module_exit(my_driver_exit);

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/device.h>

#define DEVICE_NAME "my_dev"

struct platform_device *my_device;

static int __init my_device_init(void)
{
    int ret=0;

    /*分配结构体内存*/
    my_device=platform_device_alloc(DEVICE_NAME,-1);

    /*注册平台设备*/
    ret=platform_device_add(my_device);//在platform_device_alloc中已经init了，所以调用add而不是register
    if(ret)
        platform_device_put(my_device);/*注册失败，释放相关内存*/

    return ret;
}

static void __exit my_device_exit(void)
{
    platform_device_unregister(my_device);
}

MODULE_AUTHOR("mhb@SEU");
MODULE_LICENSE("GPL");

module_init(my_device_init);
module_exit(my_device_exit);