of: add of_diff()

of_diff compares two device trees against each other and prints a
diff-like result.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/of.h b/include/of.h
index b5f54dd4e5..c8275e169b 100644
--- a/include/of.h
+++ b/include/of.h
@@ -104,6 +104,7 @@ void of_print_property(const void *data, int len);
 void of_print_cmdline(struct device_node *root);
 
 void of_print_nodes(struct device_node *node, int indent);
+void of_diff(struct device_node *a, struct device_node *b, int indent);
 int of_probe(void);
 int of_parse_dtb(struct fdt_header *fdt);
 struct device_node *of_unflatten_dtb(const void *fdt);