binman: Add support for u-boot.img as an input binary

Add an entry type for u-boot.img (a legacy U-Boot image) and a simple test.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Bin Meng <bmeng.cn@gmail.com>

tools/binman/etype/u_boot_img.py

+# Copyright (c) 2016 Google, Inc
+# Written by Simon Glass <sjg@chromium.org>
+#
+# SPDX-License-Identifier:      GPL-2.0+
+#
+# Entry-type module for U-Boot binary
+#
+
+from entry import Entry
+from blob import Entry_blob
+
+class Entry_u_boot_img(Entry_blob):
+    def __init__(self, image, etype, node):
+        Entry_blob.__init__(self, image, etype, node)
+
+    def GetDefaultFilename(self):
+        return 'u-boot.img'

tools/binman/func_test.py

@@ -713,3 +713,8 @@ class TestFunctional(unittest.TestCase):
             first = data[:len(U_BOOT_NODTB_DATA)]
             self.assertEqual('nodtb with microcode' + pos_and_size +
                             ' somewhere in here', first)
+
+    def testUBootImg(self):
+        """Test that u-boot.img can be put in a file"""
+        data = self._DoReadFile('36_u_boot_img.dts')
+        self.assertEqual(U_BOOT_IMG_DATA, data)

tools/binman/test/36_u_boot_img.dts

+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	binman {
+		u-boot-img {
+		};
+	};
+};