binman: Support expanding entries

It is useful to have entries which can grow automatically to fill
available space. Add support for this.

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

2 files changed, 57 insertions, 0 deletions

diff --git a/tools/binman/test/88_expand_size.dts b/tools/binman/test/88_expand_size.dts
new file mode 100644
index 0000000000..c8a01308ec
--- /dev/null
+++ b/tools/binman/test/88_expand_size.dts
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0+
+/dts-v1/;
+
+/ {
+	binman {
+		size = <40>;
+		fill {
+			expand-size;
+			fill-byte = [61];
+			size = <0>;
+		};
+		u-boot {
+			offset = <8>;
+		};
+		section {
+			expand-size;
+			pad-byte = <0x62>;
+			intel-mrc {
+			};
+		};
+		u-boot2 {
+			type = "u-boot";
+			offset = <16>;
+		};
+		section2 {
+			type = "section";
+			fill {
+				expand-size;
+				fill-byte = [63];
+				size = <0>;
+			};
+			u-boot {
+				offset = <8>;
+			};
+		};
+		fill2 {
+			type = "fill";
+			expand-size;
+			fill-byte = [64];
+			size = <0>;
+		};
+	};
+};
diff --git a/tools/binman/test/89_expand_size_bad.dts b/tools/binman/test/89_expand_size_bad.dts
new file mode 100644
index 0000000000..edc0e5cf68
--- /dev/null
+++ b/tools/binman/test/89_expand_size_bad.dts
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0+
+/dts-v1/;
+
+/ {
+	binman {
+		_testing {
+			expand-size;
+			return-contents-once;
+		};
+		u-boot {
+			offset = <8>;
+		};
+	};
+};