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From: Michael Olbrich <m.olbrich@pengutronix.de>
Date: Tue, 13 Sep 2016 21:17:12 +0200
Subject: [PATCH] of: base: add funtion to copy a device tree node

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
---
 drivers/of/base.c | 16 ++++++++++++++++
 include/of.h      |  2 ++
 2 files changed, 18 insertions(+)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index ea330d131012..b6e90f2adb09 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1965,6 +1965,22 @@ out:
 	return dn;
 }
 
+struct device_node *of_copy_node(struct device_node *parent, const struct device_node *other)
+{
+	struct device_node *np, *child;
+	struct property *pp;
+
+	np = of_new_node(parent, other->name);
+
+	list_for_each_entry(pp, &other->properties, list)
+		of_new_property(np, pp->name, pp->value, pp->length);
+
+	for_each_child_of_node(other, child)
+		of_copy_node(np, child);
+
+	return np;
+}
+
 void of_delete_node(struct device_node *node)
 {
 	struct device_node *n, *nt;
diff --git a/include/of.h b/include/of.h
index 0ba73f197f28..c1136708ce6c 100644
--- a/include/of.h
+++ b/include/of.h
@@ -144,6 +144,8 @@ extern struct device_node *of_new_node(struct device_node *parent,
 				const char *name);
 extern struct device_node *of_create_node(struct device_node *root,
 					const char *path);
+extern struct device_node *of_copy_node(struct device_node *parent,
+				const struct device_node *other);
 extern void of_delete_node(struct device_node *node);
 
 extern int of_machine_is_compatible(const char *compat);