media: mt9m001: register to V4L2 asynchronous subdevice framework

Register a sub-device to the asynchronous subdevice framework, and also
create subdevice device node.

Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/i2c/Kconfig

@@ -869,9 +869,8 @@ config VIDEO_VS6624
 
 config VIDEO_MT9M001
 	tristate "mt9m001 support"
-	depends on I2C && VIDEO_V4L2
+	depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
 	depends on MEDIA_CAMERA_SUPPORT
-	depends on MEDIA_CONTROLLER
 	help
 	  This driver supports MT9M001 cameras from Micron, monochrome
 	  and colour models.

drivers/media/i2c/mt9m001.c

@@ -720,6 +720,7 @@ static int mt9m001_probe(struct i2c_client *client,
 		return PTR_ERR(mt9m001->reset_gpio);
 
 	v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
+	mt9m001->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 	v4l2_ctrl_handler_init(&mt9m001->hdl, 4);
 	v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
 			V4L2_CID_VFLIP, 0, 1, 1, 0);
@@ -768,10 +769,16 @@ static int mt9m001_probe(struct i2c_client *client,
 	if (ret)
 		goto error_power_off;
 
+	ret = v4l2_async_register_subdev(&mt9m001->subdev);
+	if (ret)
+		goto error_entity_cleanup;
+
 	pm_runtime_idle(&client->dev);
 
 	return 0;
 
+error_entity_cleanup:
+	media_entity_cleanup(&mt9m001->subdev.entity);
 error_power_off:
 	pm_runtime_disable(&client->dev);
 	pm_runtime_set_suspended(&client->dev);
@@ -788,9 +795,9 @@ static int mt9m001_remove(struct i2c_client *client)
 {
 	struct mt9m001 *mt9m001 = to_mt9m001(client);
 
-	v4l2_device_unregister_subdev(&mt9m001->subdev);
 	pm_runtime_get_sync(&client->dev);
 
+	v4l2_async_unregister_subdev(&mt9m001->subdev);
 	media_entity_cleanup(&mt9m001->subdev.entity);
 
 	pm_runtime_disable(&client->dev);