Some question in include\linux\I2c.h

Hi all.
 when i read the include\linux\I2c.h,  i have a question   between
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/* include\linux\I2c.h */
  ...
/* Standard driver model interfaces */
    int (*probe)(struct i2c_client *, const struct i2c_device_id *);
    int (*remove)(struct i2c_client *);

    /* driver model interfaces that don't relate to enumeration  */
    void (*shutdown)(struct i2c_client *);
    int (*suspend)(struct i2c_client *, pm_message_t mesg);
    int (*resume)(struct i2c_client *);
...
----------------------------------
Q:
1. /* driver model interfaces that don't relate to enumeration  */------>what does this sentence mean？
2. what  the different between
int (*resume)(struct i2c_client *)
and
int (*remove)(struct i2c_client *)
?



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Best regards,

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