1 files changed, 54 insertions, 12 deletions
diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h
index 95353ae476a1..8a8977a33ec1 100644
--- a/include/media/v4l2-device.h
+++ b/include/media/v4l2-device.h
@@ -174,14 +174,56 @@ int __must_check v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
 void v4l2_device_unregister_subdev(struct v4l2_subdev *sd);
 
 /**
- * v4l2_device_register_subdev_nodes - Registers device nodes for all subdevs
- *	of the v4l2 device that are marked with
- *	the %V4L2_SUBDEV_FL_HAS_DEVNODE flag.
+ * __v4l2_device_register_subdev_nodes - Registers device nodes for
+ *      all subdevs of the v4l2 device that are marked with the
+ *      %V4L2_SUBDEV_FL_HAS_DEVNODE flag.
  *
  * @v4l2_dev: pointer to struct v4l2_device
+ * @read_only: subdevices read-only flag. True to register the subdevices
+ *	device nodes in read-only mode, false to allow full access to the
+ *	subdevice userspace API.
  */
 int __must_check
-v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev);
+__v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev,
+				    bool read_only);
+
+/**
+ * v4l2_device_register_subdev_nodes - Registers subdevices device nodes with
+ *	unrestricted access to the subdevice userspace operations
+ *
+ * Internally calls __v4l2_device_register_subdev_nodes(). See its documentation
+ * for more details.
+ *
+ * @v4l2_dev: pointer to struct v4l2_device
+ */
+static inline int __must_check
+v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev)
+{
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+	return __v4l2_device_register_subdev_nodes(v4l2_dev, false);
+#else
+	return 0;
+#endif
+}
+
+/**
+ * v4l2_device_register_ro_subdev_nodes - Registers subdevices device nodes
+ *	in read-only mode
+ *
+ * Internally calls __v4l2_device_register_subdev_nodes(). See its documentation
+ * for more details.
+ *
+ * @v4l2_dev: pointer to struct v4l2_device
+ */
+static inline int __must_check
+v4l2_device_register_ro_subdev_nodes(struct v4l2_device *v4l2_dev)
+{
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+	return __v4l2_device_register_subdev_nodes(v4l2_dev, true);
+#else
+	return 0;
+#endif
+}
 
 /**
  * v4l2_subdev_notify - Sends a notification to v4l2_device.
@@ -240,7 +282,7 @@ static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
  * @f: operation function that will be called if @cond matches.
  *	The operation functions are defined in groups, according to
  *	each element at &struct v4l2_subdev_ops.
- * @args...: arguments for @f.
+ * @args: arguments for @f.
  *
  * Ignore any errors.
  *
@@ -265,7 +307,7 @@ static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
  * @f: operation function that will be called if @cond matches.
  *	The operation functions are defined in groups, according to
  *	each element at &struct v4l2_subdev_ops.
- * @args...: arguments for @f.
+ * @args: arguments for @f.
  *
  * Ignore any errors.
  *
@@ -293,7 +335,7 @@ static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
  * @f: operation function that will be called if @cond matches.
  *	The operation functions are defined in groups, according to
  *	each element at &struct v4l2_subdev_ops.
- * @args...: arguments for @f.
+ * @args: arguments for @f.
  *
  * Return:
  *
@@ -328,7 +370,7 @@ static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
  * @f: operation function that will be called if @cond matches.
  *	The operation functions are defined in groups, according to
  *	each element at &struct v4l2_subdev_ops.
- * @args...: arguments for @f.
+ * @args: arguments for @f.
  *
  * Return:
  *
@@ -359,7 +401,7 @@ static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
  * @f: operation function that will be called if @cond matches.
  *	The operation functions are defined in groups, according to
  *	each element at &struct v4l2_subdev_ops.
- * @args...: arguments for @f.
+ * @args: arguments for @f.
  *
  * Ignore any errors.
  *
@@ -388,7 +430,7 @@ static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
  * @f: operation function that will be called if @cond matches.
  *	The operation functions are defined in groups, according to
  *	each element at &struct v4l2_subdev_ops.
- * @args...: arguments for @f.
+ * @args: arguments for @f.
  *
  * Return:
  *
@@ -419,7 +461,7 @@ static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
  * @f: operation function that will be called if @cond matches.
  *	The operation functions are defined in groups, according to
  *	each element at &struct v4l2_subdev_ops.
- * @args...: arguments for @f.
+ * @args: arguments for @f.
  *
  * Ignore any errors.
  *
@@ -447,7 +489,7 @@ static inline bool v4l2_device_supports_requests(struct v4l2_device *v4l2_dev)
  * @f: operation function that will be called if @cond matches.
  *	The operation functions are defined in groups, according to
  *	each element at &struct v4l2_subdev_ops.
- * @args...: arguments for @f.
+ * @args: arguments for @f.
  *
  * Return:
  *