linux系统初始化摄像头I2C驱动

阅读linux的ov2655的驱动程序时，并没有发现I2C驱动的初始化函数i2c_add_driver，只是定义了

static struct v4l2_i2c_driver_data v4l2_i2c_data ={    .name = S5K4BA_DRIVER_NAME,    .probe = ov2655_probe,    .remove = __devexit_p(ov2655_remove),    .id_table = ov2655_id,};

其实相关I2C初始化函数在v4l2-i2c-drv.h里I2C摄像头驱动程序都会包含该文件#include <media/v4l2-i2c-drv.h>

该文件代码很简单，I2C驱动初始化如下：
 

static int __init v4l2_i2c_drv_init(void){    //其中的v4l2_i2c_data就是前面提到的在ov2655驱动里定义结构体。    v4l2_i2c_driver.driver.name = v4l2_i2c_data.name;    v4l2_i2c_driver.command = v4l2_i2c_data.command;    v4l2_i2c_driver.probe = v4l2_i2c_data.probe;    v4l2_i2c_driver.remove = v4l2_i2c_data.remove;    v4l2_i2c_driver.suspend = v4l2_i2c_data.suspend;    v4l2_i2c_driver.resume = v4l2_i2c_data.resume;    v4l2_i2c_driver.id_table = v4l2_i2c_data.id_table;    return i2c_add_driver(&v4l2_i2c_driver);}static void __exit v4l2_i2c_drv_cleanup(void){    i2c_del_driver(&v4l2_i2c_driver);}module_init(v4l2_i2c_drv_init);module_exit(v4l2_i2c_drv_cleanup);