dtoc: Support packing the device tree
After any node/property deletion the device tree can be packed to remove
spare space. Add a way to perform this operation.
Note that for fdt_fallback, fdtput automatically packs the device tree after
deletion, so no action is required here.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/dtoc/fdt_normal.py b/tools/dtoc/fdt_normal.py
index 52d8055..f2cf608 100644
--- a/tools/dtoc/fdt_normal.py
+++ b/tools/dtoc/fdt_normal.py
@@ -140,6 +140,17 @@
"""
return self._fdt
+ def Flush(self):
+ """Flush device tree changes back to the file"""
+ with open(self._fname, 'wb') as fd:
+ fd.write(self._fdt)
+
+ def Pack(self):
+ """Pack the device tree down to its minimum size"""
+ CheckErr(libfdt.fdt_pack(self._fdt), 'pack')
+ fdt_len = libfdt.fdt_totalsize(self._fdt)
+ del self._fdt[fdt_len:]
+
def GetProps(self, node, path):
"""Get all properties from a node.