1 files changed, 29 insertions, 0 deletions

diff --git a/scripts/dtc/libfdt/fdt_rw.c b/scripts/dtc/libfdt/fdt_rw.c
index 8e7ec4cb7bcd..24437dfc32b8 100644
--- a/scripts/dtc/libfdt/fdt_rw.c
+++ b/scripts/dtc/libfdt/fdt_rw.c
@@ -289,6 +289,33 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
         return 0;
 }
 
+int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
+                   const void *val, int len)
+{
+        struct fdt_property *prop;
+        int err, oldlen, newlen;
+
+        FDT_RW_CHECK_HEADER(fdt);
+
+        prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
+        if (prop) {
+                newlen = len + oldlen;
+                err = _fdt_splice_struct(fdt, prop->data,
+                                         FDT_TAGALIGN(oldlen),
+                                         FDT_TAGALIGN(newlen));
+                if (err)
+                        return err;
+                prop->len = cpu_to_fdt32(newlen);
+                memcpy(prop->data + oldlen, val, len);
+        } else {
+                err = _fdt_add_property(fdt, nodeoffset, name, len, &prop);
+                if (err)
+                        return err;
+                memcpy(prop->data, val, len);
+        }
+        return 0;
+}
+
 int fdt_delprop(void *fdt, int nodeoffset, const char *name)
 {
         struct fdt_property *prop;
@@ -406,6 +433,8 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize)
                 struct_size = 0;
                 while (fdt_next_tag(fdt, struct_size, &struct_size) != FDT_END)
                         ;
+                if (struct_size < 0)
+                        return struct_size;
         }
 
         if (!_fdt_blocks_misordered(fdt, mem_rsv_size, struct_size)) {