of_graph: add of_graph_get_endpoint_count()

OF graph want to count its endpoint number, same as
of_get_child_count(). This patch adds of_graph_get_endpoint_count()

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index 9db632d16cbc..3e058f05ab04 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -43,6 +43,7 @@ struct of_endpoint {
 #ifdef CONFIG_OF
 int of_graph_parse_endpoint(const struct device_node *node,
                                 struct of_endpoint *endpoint);
+int of_graph_get_endpoint_count(const struct device_node *np);
 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);
@@ -64,6 +65,11 @@ static inline int of_graph_parse_endpoint(const struct device_node *node,
         return -ENOSYS;
 }
 
+static inline int of_graph_get_endpoint_count(const struct device_node *np)
+{
+        return 0;
+}
+
 static inline struct device_node *of_graph_get_port_by_id(
                                         struct device_node *node, u32 id)
 {