i2c: add initial driver model support for i2c drivers.

drivers/i2c/i2c-core.c

@@ -53,6 +53,16 @@ static void i2cproc_remove(int bus);
 #endif /* CONFIG_PROC_FS */
 
 
+int i2c_device_probe(struct device *dev)
+{
+	return -ENODEV;
+}
+
+int i2c_device_remove(struct device *dev)
+{
+	return 0;
+}
+
 /* ---------------------------------------------------
  * registering functions 
  * --------------------------------------------------- 
@@ -205,6 +215,16 @@ int i2c_add_driver(struct i2c_driver *driver)
 	
 	DEB(printk(KERN_DEBUG "i2c-core.o: driver %s registered.\n",driver->name));
 
+	/* add the driver to the list of i2c drivers in the driver core */
+	driver->driver.name = driver->name;
+	driver->driver.bus = &i2c_bus_type;
+	driver->driver.probe = i2c_device_probe;
+	driver->driver.remove = i2c_device_remove;
+
+	res = driver_register(&driver->driver);
+	if (res)
+		goto out_unlock;
+	
 	/* now look for instances of driver on our adapters
 	 */
 	if (driver->flags& (I2C_DF_NOTIFY|I2C_DF_DUMMY)) {
@@ -236,6 +256,8 @@ int i2c_del_driver(struct i2c_driver *driver)
 		goto out_unlock;
 	}
 
+	driver_unregister(&driver->driver);
+
 	/* Have a look at each adapter, if clients of this driver are still
 	 * attached. If so, detach them to be able to kill the driver 
 	 * afterwards.

include/linux/i2c.h

@@ -143,7 +143,10 @@ struct i2c_driver {
 	 * with the device.
 	 */
 	int (*command)(struct i2c_client *client,unsigned int cmd, void *arg);
+
+	struct device_driver driver;
 };
+#define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
 
 extern struct bus_type i2c_bus_type;