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-rw-r--r--tools/binman/README7
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diff --git a/tools/binman/README b/tools/binman/README
index 04ed2b799c..927fa856ac 100644
--- a/tools/binman/README
+++ b/tools/binman/README
@@ -342,6 +342,13 @@ size:
Sets the image size in bytes, for example 'size = <0x100000>' for a
1MB image.
+offset:
+ This is similar to 'offset' in entries, setting the offset of a section
+ within the image or section containing it. The first byte of the section
+ is normally at offset 0. If 'offset' is not provided, binman sets it to
+ the end of the previous region, or the start of the image's entry area
+ (normally 0) if there is no previous region.
+
align-size:
This sets the alignment of the image size. For example, to ensure
that the image ends on a 512-byte boundary, use 'align-size = <512>'.