dtoc: Export the _FindNode() function

This is useful for clients that want to find a node. Export it so it can
be used by others.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/dtoc/fdt.py

@@ -181,7 +181,7 @@ class Node:
         self.subnodes = []
         self.props = {}
 
-    def _FindNode(self, name):
+    def FindNode(self, name):
         """Find a node given its name
 
         Args:
@@ -349,7 +349,7 @@ class Fdt:
         if len(parts) < 2:
             return None
         for part in parts[1:]:
-            node = node._FindNode(part)
+            node = node.FindNode(part)
             if not node:
                 return None
         return node

tools/dtoc/test_fdt.py

@@ -155,12 +155,12 @@ class TestNode(unittest.TestCase):
         self.assertEqual(prop.value, value)
 
     def testFindNode(self):
-        """Tests that we can find a node using the _FindNode() functoin"""
-        node = self.dtb.GetRoot()._FindNode('i2c@0')
+        """Tests that we can find a node using the FindNode() functoin"""
+        node = self.dtb.GetRoot().FindNode('i2c@0')
         self.assertEqual('i2c@0', node.name)
-        subnode = node._FindNode('pmic@9')
+        subnode = node.FindNode('pmic@9')
         self.assertEqual('pmic@9', subnode.name)
-        self.assertEqual(None, node._FindNode('missing'))
+        self.assertEqual(None, node.FindNode('missing'))
 
     def testRefreshMissingNode(self):
         """Test refreshing offsets when an extra node is present in dtb"""