media: device property: Add a function to test is a fwnode is a graph endpoint

Drivers may need to test if a fwnode is a graph endpoint. To avoid
hand-written solutions that wouldn't work for all fwnode types, add a
new fwnode_graph_is_endpoint() function for this purpose. We don't need
to wire it up to different backends for OF and ACPI for now, as the
implementation can simply be based on checkout the presence of a
remote-endpoint property.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/include/linux/property.h b/include/linux/property.h
index 10d03572f52e5fc65ee980558cc4bc7328c8522d..9f805c442819532a894a7c6a7e52efccec29ebca 100644 (file)
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -389,6 +389,11 @@ struct fwnode_handle *
 fwnode_graph_get_remote_node(const struct fwnode_handle *fwnode, u32 port,
                             u32 endpoint);
 
+static inline bool fwnode_graph_is_endpoint(struct fwnode_handle *fwnode)
+{
+       return fwnode_property_present(fwnode, "remote-endpoint");
+}
+
 /*
  * Fwnode lookup flags
  *