Merge tag 'of-graph-drm-2015-04-08' of git://git.pengutronix.de/git/pza/linux into drm-next

drm: Use of-graph helpers to loop over endpoints

Convert all drm callers that use of_graph_get_next_endpoint to loop over
of-graph endpoints to the newly introduced for_each_endpoint_of_node
helper macro.

* tag 'of-graph-drm-2015-04-08' of git://git.pengutronix.de/git/pza/linux:
  drm/rockchip: use for_each_endpoint_of_node macro, drop endpoint reference on break
  drm/rcar-du: use for_each_endpoint_of_node macro
  drm/imx: use for_each_endpoint_of_node macro in imx_drm_encoder_get_mux_id
  drm: use for_each_endpoint_of_node macro in drm_of_find_possible_crtcs
  of: Explicitly include linux/types.h in of_graph.h
  dt-bindings: brcm: rationalize Broadcom documentation naming
  of/unittest: replace 'selftest' with 'unittest'
  Documentation: rename of_selftest.txt to of_unittest.txt
  Documentation: update the of_selftest.txt
  dt: OF_UNITTEST make dependency broken
  MAINTAINERS: Pantelis Antoniou device tree overlay maintainer
  of: Add of_graph_get_port_by_id function
  of: Add for_each_endpoint_of_node helper macro
  of: Decrement refcount of previous endpoint in of_graph_get_next_endpoint

1 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index befef42e015b..7bc92e050608 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -14,6 +14,8 @@
 #ifndef __LINUX_OF_GRAPH_H
 #define __LINUX_OF_GRAPH_H
 
+#include <linux/types.h>
+
 /**
  * struct of_endpoint - the OF graph endpoint data structure
  * @port: identifier (value of reg property) of a port this endpoint belongs to
@@ -26,9 +28,21 @@ struct of_endpoint {
         const struct device_node *local_node;
 };
 
+/**
+ * for_each_endpoint_of_node - iterate over every endpoint in a device node
+ * @parent: parent device node containing ports and endpoints
+ * @child: loop variable pointing to the current endpoint node
+ *
+ * When breaking out of the loop, of_node_put(child) has to be called manually.
+ */
+#define for_each_endpoint_of_node(parent, child) \
+        for (child = of_graph_get_next_endpoint(parent, NULL); child != NULL; \
+             child = of_graph_get_next_endpoint(parent, child))
+
 #ifdef CONFIG_OF
 int of_graph_parse_endpoint(const struct device_node *node,
                                 struct of_endpoint *endpoint);
+struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id);
 struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
                                         struct device_node *previous);
 struct device_node *of_graph_get_remote_port_parent(
@@ -42,6 +56,12 @@ static inline int of_graph_parse_endpoint(const struct device_node *node,
         return -ENOSYS;
 }
 
+static inline struct device_node *of_graph_get_port_by_id(
+                                        struct device_node *node, u32 id)
+{
+        return NULL;
+}
+
 static inline struct device_node *of_graph_get_next_endpoint(
                                         const struct device_node *parent,
                                         struct device_node *previous)