dm: core: Add a function to create an empty tree

Provide a function to create a new, empty tree.

Signed-off-by: Simon Glass <[email protected]>

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/of_live.c b/lib/of_live.c
index 25f7af61061..e4eee385547 100644
--- a/lib/of_live.c
+++ b/lib/of_live.c
@@ -336,3 +336,22 @@ void of_live_free(struct device_node *root)
 	/* the tree is stored as a contiguous block of memory */
 	free(root);
 }
+
+int of_live_create_empty(struct device_node **rootp)
+{
+	struct device_node *root;
+
+	root = calloc(1, sizeof(struct device_node));
+	if (!root)
+		return -ENOMEM;
+	root->name = strdup("");
+	if (!root->name) {
+		free(root);
+		return -ENOMEM;
+	}
+	root->type = "<NULL>";
+	root->full_name = "";
+	*rootp = root;
+
+	return 0;
+}