/**
* module_i2c_driver() - Helper macro for registering a I2C driver
* @__i2c_driver: i2c_driver struct
*
* Helper macro for I2C drivers which do not do anything special in module
* init/exit. This eliminates a lot of boilerplate. Each module may only
* use this macro once, and calling it replaces module_init() and module_exit()
*/
#define module_i2c_driver(__i2c_driver) \
module_driver(__i2c_driver, i2c_add_driver, \
i2c_del_driver)

使用module_i2c_driver(xxx_i2c_driver)
可以取代
-static int __init xxx_i2c_init(void)
-{
- return i2c_add_driver(&xxx_i2c_driver);
-}
-
-static void __exit xxx_i2c_exit(void)
-{
- i2c_del_driver(&xxx_i2c_driver);
-}
-
-
-module_init(xxx_i2c_init);
-module_exit(xxx_i2c_exit);