[PATCH v4 1/7] of: Make of_graph_get_port_by_id take a const device_node

[Maxime Ripard]

of_graph_get_port_by_id doesn't modify the device_node pointer it takes
as argument, so we can make it const.

Signed-off-by: Maxime Ripard <maxime at cerno.tech>
---
 drivers/of/property.c    | 2 +-
 include/linux/of_graph.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/of/property.c b/drivers/of/property.c
index 5f9eed79a8aa..ff48271c5944 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -584,7 +584,7 @@ EXPORT_SYMBOL(of_graph_parse_endpoint);
  * Return: A 'port' node pointer with refcount incremented. The caller
  * has to use of_node_put() on it when done.
  */
-struct device_node *of_graph_get_port_by_id(struct device_node *parent, u32 id)
+struct device_node *of_graph_get_port_by_id(const struct device_node *parent, u32 id)
 {
 	struct device_node *node, *port;
 
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index 4d7756087b6b..87f3f4d0d0df 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -42,7 +42,7 @@ bool of_graph_is_present(const struct device_node *node);
 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_port_by_id(const 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_endpoint_by_regs(
@@ -74,7 +74,7 @@ static inline int of_graph_get_endpoint_count(const struct device_node *np)
 }
 
 static inline struct device_node *of_graph_get_port_by_id(
-					struct device_node *node, u32 id)
+					const struct device_node *node, u32 id)
 {
 	return NULL;
 }
-- 
2.29.2