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libfdt: Export overlay_apply_node() as fdt_overlay_apply_node()

This function is useful to merge a subset of DT into another DT, for
example if some prior-stage firmware passes a DT fragment to U-Boot
and U-Boot needs to merge it into its own DT. Export this function
to permit implementing such functionality.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Marek Vasut 4 years ago
parent
commit
c1bde2378a
2 changed files with 12 additions and 0 deletions
  1. 5 0
      scripts/dtc/libfdt/fdt_overlay.c
  2. 7 0
      scripts/dtc/libfdt/libfdt.h

+ 5 - 0
scripts/dtc/libfdt/fdt_overlay.c

@@ -879,3 +879,8 @@ err:
 
 	return ret;
 }
+
+int fdt_overlay_apply_node(void *fdt, int target, void *fdto, int node)
+{
+	return overlay_apply_node(fdt, target, fdto, node);
+}

+ 7 - 0
scripts/dtc/libfdt/libfdt.h

@@ -2032,6 +2032,13 @@ int fdt_del_node(void *fdt, int nodeoffset);
  */
 int fdt_overlay_apply(void *fdt, void *fdto);
 
+/**
+ * fdt_overlay_apply_node - Merges a node into the base device tree
+ *
+ * See overlay_apply_node() for details.
+ */
+int fdt_overlay_apply_node(void *fdt, int target, void *fdto, int node);
+
 /**********************************************************************/
 /* Debugging / informational functions                                */
 /**********************************************************************/