[PATCH RFC 6/6] binman: doc: update Optional entries

[Yannic Moog]

The binman documentation of Optional entries is not accurate in the
sense that it does not cover blobs entry type. As this is also the most
widely used type to have the optional entry, document the interaction
with faking blobs.

Signed-off-by: Yannic Moog <y.moog at phytec.de>
---
 tools/binman/binman.rst | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/binman/binman.rst b/tools/binman/binman.rst
index 990fc295770..2bafa6ca408 100644
--- a/tools/binman/binman.rst
+++ b/tools/binman/binman.rst
@@ -1145,7 +1145,14 @@ called on all entries.
 It is not possible for an entry to mark itself absent at any other point in the
 processing. It must happen in the ObtainContents() method.
 
-The effect is as if the entry had never been present at all, since the image
+The effect depends on the type of entry.
+
+Blobs
+~~~~~
+For blobs, the effect depends on whether --fake-ext-blobs is passed
+to binman. (This is the case by default)
+In case --fake-ext-blobs is set, any missing entries will be faked.
+If not set, it is as if the entry had never been present at all, since the image
 is packed without it and it disappears from the list of entries.
 
 

-- 
2.43.0