From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Thu, 20 Apr 2017 01:31:42 +0000
Subject: of_graph: add of_graph_get_remote_endpoint()
Git-commit: 4c9c3d595f1bad021cc126d20879df4016801736
Patch-mainline: v4.13-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

It should use same method to get same result.
To getting remote-endpoint node,
let's use of_graph_get_remote_endpoint()

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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/of/base.c        |   18 ++++++++++++++++--
 include/linux/of_graph.h |    8 ++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2487,6 +2487,20 @@ struct device_node *of_graph_get_endpoin
 EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);
 
 /**
+ * of_graph_get_remote_endpoint() - get remote endpoint node
+ * @node: pointer to a local endpoint device_node
+ *
+ * Return: Remote endpoint node associated with remote endpoint node linked
+ *	   to @node. Use of_node_put() on it when done.
+ */
+struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
+{
+	/* Get remote endpoint node. */
+	return of_parse_phandle(node, "remote-endpoint", 0);
+}
+EXPORT_SYMBOL(of_graph_get_remote_endpoint);
+
+/**
  * of_graph_get_remote_port_parent() - get remote port's parent node
  * @node: pointer to a local endpoint device_node
  *
@@ -2500,7 +2514,7 @@ struct device_node *of_graph_get_remote_
 	unsigned int depth;
 
 	/* Get remote endpoint node. */
-	np = of_parse_phandle(node, "remote-endpoint", 0);
+	np = of_graph_get_remote_endpoint(node);
 
 	/* Walk 3 levels up only if there is 'ports' node. */
 	for (depth = 3; depth && np; depth--) {
@@ -2524,7 +2538,7 @@ struct device_node *of_graph_get_remote_
 	struct device_node *np;
 
 	/* Get remote endpoint node. */
-	np = of_parse_phandle(node, "remote-endpoint", 0);
+	np = of_graph_get_remote_endpoint(node);
 	if (!np)
 		return NULL;
 	return of_get_next_parent(np);
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -48,6 +48,8 @@ struct device_node *of_graph_get_next_en
 					struct device_node *previous);
 struct device_node *of_graph_get_endpoint_by_regs(
 		const struct device_node *parent, int port_reg, int reg);
+struct device_node *of_graph_get_remote_endpoint(
+					const struct device_node *node);
 struct device_node *of_graph_get_remote_port_parent(
 					const struct device_node *node);
 struct device_node *of_graph_get_remote_port(const struct device_node *node);
@@ -79,6 +81,12 @@ static inline struct device_node *of_gra
 {
 	return NULL;
 }
+
+static inline struct device_node *of_graph_get_remote_endpoint(
+					const struct device_node *node)
+{
+	return NULL;
+}
 
 static inline struct device_node *of_graph_get_remote_port_parent(
 					const struct device_node *node)