pylibfdt: Convert to Python 3

Build this swig module with Python 3.

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

scripts/dtc/pylibfdt/Makefile

@@ -21,7 +21,7 @@ quiet_cmd_pymod = PYMOD   $@
 		CPPFLAGS="$(HOSTCFLAGS) -I$(LIBFDT_srcdir)" OBJDIR=$(obj) \
 		SOURCES="$(PYLIBFDT_srcs)" \
 		SWIG_OPTS="-I$(LIBFDT_srcdir) -I$(LIBFDT_srcdir)/.." \
-		$(PYTHON2) $< --quiet build_ext --inplace
+		$(PYTHON3) $< --quiet build_ext --inplace
 
 $(obj)/_libfdt.so: $(src)/setup.py $(PYLIBFDT_srcs) FORCE
 	$(call if_changed,pymod)

scripts/dtc/pylibfdt/libfdt.i_shipped

@@ -624,7 +624,7 @@ class Fdt(FdtRo):
         Raises:
             FdtException if no parent found or other error occurs
         """
-        val = val.encode('utf-8') + '\0'
+        val = val.encode('utf-8') + b'\0'
         return check_err(fdt_setprop(self._fdt, nodeoffset, prop_name,
                                      val, len(val)), quiet)
 

scripts/dtc/pylibfdt/setup.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 """
 setup.py file for SWIG libfdt

tools/binman/entry.py

@@ -7,16 +7,7 @@
 from __future__ import print_function
 
 from collections import namedtuple
-
-# importlib was introduced in Python 2.7 but there was a report of it not
-# working in 2.7.12, so we work around this:
-# http://lists.denx.de/pipermail/u-boot/2016-October/269729.html
-try:
-    import importlib
-    have_importlib = True
-except:
-    have_importlib = False
-
+import importlib
 import os
 import sys
 
@@ -119,10 +110,7 @@ class Entry(object):
             old_path = sys.path
             sys.path.insert(0, os.path.join(our_path, 'etype'))
             try:
-                if have_importlib:
-                    module = importlib.import_module(module_name)
-                else:
-                    module = __import__(module_name)
+                module = importlib.import_module(module_name)
             except ImportError as e:
                 raise ValueError("Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
                                  (etype, node_path, module_name, e))

tools/binman/entry_test.py

@@ -39,21 +39,6 @@ class TestEntry(unittest.TestCase):
         else:
             import entry
 
-    def test1EntryNoImportLib(self):
-        """Test that we can import Entry subclassess successfully"""
-        sys.modules['importlib'] = None
-        global entry
-        self._ReloadEntry()
-        entry.Entry.Create(None, self.GetNode(), 'u-boot')
-        self.assertFalse(entry.have_importlib)
-
-    def test2EntryImportLib(self):
-        del sys.modules['importlib']
-        global entry
-        self._ReloadEntry()
-        entry.Entry.Create(None, self.GetNode(), 'u-boot-spl')
-        self.assertTrue(entry.have_importlib)
-
     def testEntryContents(self):
         """Test the Entry bass class"""
         import entry

tools/binman/etype/intel_fit.py

@@ -27,6 +27,6 @@ class Entry_intel_fit(Entry_blob):
         self.align = 16
 
     def ObtainContents(self):
-        data = struct.pack('<8sIHBB', '_FIT_   ', 1, 0x100, 0x80, 0x7d)
+        data = struct.pack('<8sIHBB', b'_FIT_   ', 1, 0x100, 0x80, 0x7d)
         self.SetContents(data)
         return True