queations regarding i2c_add_device driver ?

Nilesh Mane said:

I have two queations ,

//in linux kernel

// Que.1=============================================

static const struct i2c_device_id mt9v113_id[]=

{

 {"mt9v113",0},

{},

};

MODULE_DEVICE_TABLE(i2c,mt9v113_id); // what is the role of this  function ?

Looks like its a macro letting kernel know about i2c device

Nilesh Mane said:

//=============================================

//Que.2========================================

static struct i2c_driver mt9v113_i2c_driver=

{ .driver= {

.name ="mt9v113",

.owner = THIS_MODULE,

},

.probe=mt9v113_probe,                                        //Here function call is without parameters?

.remove=__exist_p(mtpv113_remove),

.id_table=mt9v113_id,

};

It is just assigning function pointer. When Kernel wants to probe, it will call using that function pointer

Nilesh Mane said:

static int mt9v113_probe(struct i2c_client * client , const struct i2c_device_id * id)   //How these parameters are passed to this function ?

{

}

//===========================================

Kernel knows about parameters as its defined by Kernel.