dtoc: Fix widening of int to bytes

At present an integer is converted to bytes incorrectly. The whole 32-bit
integer is inserted as the first element of the byte array, and the other
three bytes are skipped. This was not noticed because the unit test did
not check it, and the functional test was checking for wrong values.

Update the code to handle this as a special case. Add one more test to
cover all code paths.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/tools/dtoc/test_fdt.py b/tools/dtoc/test_fdt.py
index b4f9b7f498f..cfe3e04c7ad 100755
--- a/tools/dtoc/test_fdt.py
+++ b/tools/dtoc/test_fdt.py
@@ -298,6 +298,7 @@ class TestProp(unittest.TestCase):
     def testWiden(self):
         """Test widening of values"""
         node2 = self.dtb.GetNode('/spl-test2')
+        node3 = self.dtb.GetNode('/spl-test3')
         prop = self.node.props['intval']
 
         # No action
@@ -316,11 +317,20 @@ class TestProp(unittest.TestCase):
         # byte array, it should turn into an array.
         prop = self.node.props['longbytearray']
         prop2 = node2.props['longbytearray']
+        prop3 = node3.props['longbytearray']
         self.assertFalse(isinstance(prop2.value, list))
         self.assertEqual(4, len(prop2.value))
+        self.assertEqual(b'\x09\x0a\x0b\x0c', prop2.value)
         prop2.Widen(prop)
         self.assertTrue(isinstance(prop2.value, list))
         self.assertEqual(9, len(prop2.value))
+        self.assertEqual(['\x09', '\x0a', '\x0b', '\x0c', '\0',
+                          '\0', '\0', '\0', '\0'], prop2.value)
+        prop3.Widen(prop)
+        self.assertTrue(isinstance(prop3.value, list))
+        self.assertEqual(9, len(prop3.value))
+        self.assertEqual(['\x09', '\x0a', '\x0b', '\x0c', '\x0d',
+                          '\x0e', '\x0f', '\x10', '\0'], prop3.value)
 
         # Similarly for a string array
         prop = self.node.props['stringval']