doc: uImage.FIT: signature.txt: add option padding

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/doc/uImage.FIT/signature.txt b/doc/uImage.FIT/signature.txt
index a765722..bfff6fd 100644 (file)
--- a/doc/uImage.FIT/signature.txt
+++ b/doc/uImage.FIT/signature.txt
@@ -106,6 +106,9 @@ When the image is signed, the following properties are optional:
 
 - comment: Additional information about the signer or image
 
+- padding: The padding algorithm, it may be pkcs-1.5 or pss,
+       if no value is provided we assume pkcs-1.5
+
 For config bindings (see Signed Configurations below), the following
 additional properties are optional: