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struct i2c_driver {
    unsigned int class;
    /* Notifies the driver that a new bus has appeared or is about to be
     * removed. You should avoid using this if you can, it will probably
     * be removed in a near future.
     */
 
   int (*attach_adapter)(struct i2c_adapter *);
    int (*detach_adapter)(struct i2c_adapter *);
    /* Standard driver model interfaces */
    int (*probe)(struct i2c_client *, const struct i2c_device_id *);
    int (*remove)(struct i2c_client *);
...
}
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