[media] em28xx: move struct v4l2_clk *clk from struct em28xx to struct v4l2

The current clock definition applies only to the V4L2 side of the
driver. Move its struct pointer to the v4l2_dev, where it belongs.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/em28xx/em28xx-camera.c

@@ -330,13 +330,14 @@ int em28xx_init_camera(struct em28xx *dev)
 	char clk_name[V4L2_SUBDEV_NAME_SIZE];
 	struct i2c_client *client = &dev->i2c_client[dev->def_i2c_bus];
 	struct i2c_adapter *adap = &dev->i2c_adap[dev->def_i2c_bus];
+	struct em28xx_v4l2 *v4l2 = dev->v4l2;
 	int ret = 0;
 
 	v4l2_clk_name_i2c(clk_name, sizeof(clk_name),
 			  i2c_adapter_id(adap), client->addr);
-	dev->clk = v4l2_clk_register_fixed(clk_name, "mclk", -EINVAL);
-	if (IS_ERR(dev->clk))
-		return PTR_ERR(dev->clk);
+	v4l2->clk = v4l2_clk_register_fixed(clk_name, "mclk", -EINVAL);
+	if (IS_ERR(v4l2->clk))
+		return PTR_ERR(v4l2->clk);
 
 	switch (dev->em28xx_sensor) {
 	case EM28XX_MT9V011:
@@ -448,8 +449,8 @@ int em28xx_init_camera(struct em28xx *dev)
 	}
 
 	if (ret < 0) {
-		v4l2_clk_unregister_fixed(dev->clk);
-		dev->clk = NULL;
+		v4l2_clk_unregister_fixed(v4l2->clk);
+		v4l2->clk = NULL;
 	}
 
 	return ret;

drivers/media/usb/em28xx/em28xx-video.c

@@ -1970,9 +1970,9 @@ static int em28xx_v4l2_fini(struct em28xx *dev)
 	v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
 	v4l2_device_unregister(&v4l2->v4l2_dev);
 
-	if (dev->clk) {
-		v4l2_clk_unregister_fixed(dev->clk);
-		dev->clk = NULL;
+	if (v4l2->clk) {
+		v4l2_clk_unregister_fixed(v4l2->clk);
+		v4l2->clk = NULL;
 	}
 
 	kref_put(&v4l2->ref, em28xx_free_v4l2);

drivers/media/usb/em28xx/em28xx.h

@@ -504,6 +504,7 @@ struct em28xx_v4l2 {
 
 	struct v4l2_device v4l2_dev;
 	struct v4l2_ctrl_handler ctrl_handler;
+	struct v4l2_clk *clk;
 };
 
 struct em28xx_audio {
@@ -569,7 +570,6 @@ struct em28xx {
 	unsigned int has_alsa_audio:1;
 	unsigned int is_audio_only:1;
 
-	struct v4l2_clk *clk;
 	struct em28xx_board board;
 
 	/* Webcam specific fields */