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>

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 4c305599a664dde0e9ccb880641d1fa4f4892496..cb1c49ae3b889e87e5c585aab3349b3b30e472b2 100644 (file)
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2559,6 +2559,18 @@ struct device_node *of_graph_get_remote_port(const struct device_node *node)
 }
 EXPORT_SYMBOL(of_graph_get_remote_port);
 
+int of_graph_get_endpoint_count(const struct device_node *np)
+{
+       struct device_node *endpoint;
+       int num = 0;
+
+       for_each_endpoint_of_node(np, endpoint)
+               num++;
+
+       return num;
+}
+EXPORT_SYMBOL(of_graph_get_endpoint_count);
+
 /**
  * of_graph_get_remote_node() - get remote parent device_node for given port/endpoint
  * @node: pointer to parent device_node containing graph port/endpoint

diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index 9db632d16cbcb0199019e3ae88ed309d62122b3c..3e058f05ab04793e81f0b40f8b9cf9400d03c824 100644 (file)
--- 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)
 {