(1)提高程序可移植性
(2)
#include <linux/device.h>
#include <linux/module.h>#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/platform_device.h>
MODULE_AUTHOR("David Xie");
MODULE_LICENSE("Dual BSD/GPL");
static struct platform_device *my_device;
static int __init my_device_init(void)
{
int ret = 0;
/* 分配结构 */
my_device = platform_device_alloc("my_dev", -1);
/*注册设备*/
ret = platform_device_add(my_device);
/*注册失败,释放相关内存*/
if (ret)
platform_device_put(my_device);
return ret;
}
static void my_device_exit(void)
{
platform_device_unregister(my_device);
}
module_init(my_device_init);
module_exit(my_device_exit);
#include <linux/device.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/platform_device.h>
MODULE_AUTHOR("David Xie");
MODULE_LICENSE("Dual BSD/GPL");
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;
}
static struct platform_driver my_driver = {
.probe = my_probe,
.remove = my_remove,
.driver = {
.owner = THIS_MODULE,
.name = "my_dev",
},
};
static int __init my_driver_init(void)
{
/*注册平台驱动*/
return platform_driver_register(&my_driver);
}
static void my_driver_exit(void)
{
platform_driver_unregister(&my_driver);
}
module_init(my_driver_init);
module_exit(my_driver_exit);