[PATCH 2/3] binman: Respect pad-before property of section subentries

[Alper Nebi Yasak]

Other relevant properties (pad-after, offset, size, align, align-size,
align-end) already work since Pack() sets correct ranges for subentries'
data (.offset, .size variables), but some padding here is necessary to
align the data within this range to match the pad-before property.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak at gmail.com>
---

 tools/binman/etype/section.py             |  2 +-
 tools/binman/ftest.py                     |  8 +++++++
 tools/binman/test/165_pad_in_sections.dts | 26 +++++++++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 tools/binman/test/165_pad_in_sections.dts

diff --git a/tools/binman/etype/section.py b/tools/binman/etype/section.py
index c5166a5b57..72600b1ef3 100644
--- a/tools/binman/etype/section.py
+++ b/tools/binman/etype/section.py
@@ -152,7 +152,7 @@ class Entry_section(Entry):
         for entry in self._entries.values():
             data = entry.GetData()
             base = self.pad_before + (entry.offset or 0) - self._skip_at_start
-            pad = base - len(section_data)
+            pad = base - len(section_data) + (entry.pad_before or 0)
             if pad > 0:
                 section_data += tools.GetBytes(self._pad_byte, pad)
             section_data += data
diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index 5f650b5f94..8edf85c89f 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -1269,6 +1269,14 @@ class TestFunctional(unittest.TestCase):
                     U_BOOT_DATA + tools.GetBytes(ord('&'), 4))
         self.assertEqual(expected, data)
 
+    def testPadInSections(self):
+        """Test pad-before, pad-after for entries in sections"""
+        data = self._DoReadFile('165_pad_in_sections.dts')
+        expected = (U_BOOT_DATA + tools.GetBytes(ord('!'), 12) +
+                    U_BOOT_DATA + tools.GetBytes(ord('!'), 6) +
+                    U_BOOT_DATA)
+        self.assertEqual(expected, data)
+
     def testMap(self):
         """Tests outputting a map of the images"""
         _, _, map_data, _ = self._DoReadFileDtb('055_sections.dts', map=True)
diff --git a/tools/binman/test/165_pad_in_sections.dts b/tools/binman/test/165_pad_in_sections.dts
new file mode 100644
index 0000000000..f2b327ff9f
--- /dev/null
+++ b/tools/binman/test/165_pad_in_sections.dts
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	binman {
+		pad-byte = <0x26>;
+		section {
+			pad-byte = <0x21>;
+
+			before {
+				type = "u-boot";
+			};
+			u-boot {
+				pad-before = <12>;
+				pad-after = <6>;
+			};
+			after {
+				type = "u-boot";
+			};
+		};
+	};
+};
-- 
2.28.0