video: of: Constify node argument to display timing functions

The node pointer passed to the display timing functions is never
modified, make it const.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 8 insertions, 7 deletions

diff --git a/include/video/of_display_timing.h b/include/video/of_display_timing.h
index ea755b5..956455f 100644
--- a/include/video/of_display_timing.h
+++ b/include/video/of_display_timing.h
@@ -16,21 +16,22 @@ struct display_timings;
 #define OF_USE_NATIVE_MODE -1
 
 #ifdef CONFIG_OF
-int of_get_display_timing(struct device_node *np, const char *name,
+int of_get_display_timing(const struct device_node *np, const char *name,
 		struct display_timing *dt);
-struct display_timings *of_get_display_timings(struct device_node *np);
-int of_display_timings_exist(struct device_node *np);
+struct display_timings *of_get_display_timings(const struct device_node *np);
+int of_display_timings_exist(const struct device_node *np);
 #else
-static inline int of_get_display_timing(struct device_node *np, const char *name,
-		struct display_timing *dt)
+static inline int of_get_display_timing(const struct device_node *np,
+		const char *name, struct display_timing *dt)
 {
 	return -ENOSYS;
 }
-static inline struct display_timings *of_get_display_timings(struct device_node *np)
+static inline struct display_timings *
+of_get_display_timings(const struct device_node *np)
 {
 	return NULL;
 }
-static inline int of_display_timings_exist(struct device_node *np)
+static inline int of_display_timings_exist(const struct device_node *np)
 {
 	return -ENOSYS;
 }