i2c: actually register the i2c client device with the driver core.

We have to initialize the client structure with 0 to keep the
driver core from oopsing.

Now everything is hooked up enough to start removing the i2c sysctl
and proc crud.

drivers/i2c/chips/adm1021.c

@@ -221,6 +221,8 @@ static int adm1021_detect(struct i2c_adapter *adapter, int address,
 		err = -ENOMEM;
 		goto error0;
 	}
+	memset(new_client, 0x00, sizeof(struct i2c_client) +
+				 sizeof(struct adm1021_data));
 
 	data = (struct adm1021_data *) (new_client + 1);
 	i2c_set_clientdata(new_client, data);

drivers/i2c/chips/lm75.c

@@ -140,6 +140,8 @@ static int lm75_detect(struct i2c_adapter *adapter, int address,
 		err = -ENOMEM;
 		goto error0;
 	}
+	memset(new_client, 0x00, sizeof(struct i2c_client) +
+				 sizeof(struct lm75_data));
 
 	data = (struct lm75_data *) (new_client + 1);
 	i2c_set_clientdata(new_client, data);

drivers/i2c/i2c-core.c

@@ -378,6 +378,15 @@ int i2c_attach_client(struct i2c_client *client)
 
 	if (client->flags & I2C_CLIENT_ALLOW_USE)
 		client->usage_count = 0;
+
+	client->dev.parent = &client->adapter->dev;
+	client->dev.driver = &client->driver->driver;
+	client->dev.bus = &i2c_bus_type;
+	
+	snprintf(&client->dev.bus_id[0], sizeof(client->dev.bus_id), "i2c_dev_%d", i);
+	printk("registering %s\n", client->dev.bus_id);
+	device_register(&client->dev);
+	
 	return 0;
 }
 
@@ -414,6 +423,7 @@ int i2c_detach_client(struct i2c_client *client)
 	res = -ENODEV;
 
  out_unlock:
+	device_unregister(&client->dev);
 	up(&adapter->list);
  out:
 	return res;