media: v4l2-ctrls: Add helper to register properties

Add an helper function to v4l2-ctrls to register controls associated
with a device property.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 224c10823bbf..f40e2cbb21d3 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -30,6 +30,7 @@ struct v4l2_ctrl;
 struct v4l2_ctrl_handler;
 struct v4l2_ctrl_helper;
 struct v4l2_fh;
+struct v4l2_fwnode_device_properties;
 struct v4l2_subdev;
 struct v4l2_subscribed_event;
 struct video_device;
@@ -1428,4 +1429,29 @@ int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
  */
 int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd);
 
+/**
+ * v4l2_ctrl_new_fwnode_properties() - Register controls for the device
+ *				       properties
+ *
+ * @hdl: pointer to &struct v4l2_ctrl_handler to register controls on
+ * @ctrl_ops: pointer to &struct v4l2_ctrl_ops to register controls with
+ * @p: pointer to &struct v4l2_fwnode_device_properties
+ *
+ * This function registers controls associated to device properties, using the
+ * property values contained in @p parameter, if the property has been set to
+ * a value.
+ *
+ * Currently the following v4l2 controls are parsed and registered:
+ * - V4L2_CID_CAMERA_ORIENTATION
+ * - V4L2_CID_CAMERA_SENSOR_ROTATION;
+ *
+ * Controls already registered by the caller with the @hdl control handler are
+ * not overwritten. Callers should register the controls they want to handle
+ * themselves before calling this function.
+ *
+ * Return: 0 on success, a negative error code on failure.
+ */
+int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,
+				    const struct v4l2_ctrl_ops *ctrl_ops,
+				    const struct v4l2_fwnode_device_properties *p);
 #endif