media: device property: Define format macros for ports and endpoints

OF, ACPI and software_nodes all implement graphs including nodes for ports
and endpoints. These are all intended to be named with a common schema,
as "port@n" and "endpoint@n" where n is an unsigned int representing the
index of the node. To ensure commonality across the subsystems, provide a
set of macros to define the format.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

include/linux/fwnode.h

@@ -50,6 +50,13 @@ struct fwnode_endpoint {
 	const struct fwnode_handle *local_fwnode;
 };
 
+/*
+ * ports and endpoints defined as software_nodes should all follow a common
+ * naming scheme; use these macros to ensure commonality.
+ */
+#define SWNODE_GRAPH_PORT_NAME_FMT		"port@%u"
+#define SWNODE_GRAPH_ENDPOINT_NAME_FMT		"endpoint@%u"
+
 #define NR_FWNODE_REFERENCE_ARGS	8
 
 /**