binman: Tidy up comment for Bintoolfdt_add_pubkey.run()
This function returns a value, so add documentation for it.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/btool/fdt_add_pubkey.py b/tools/binman/btool/fdt_add_pubkey.py
index a507742..75a9716 100644
--- a/tools/binman/btool/fdt_add_pubkey.py
+++ b/tools/binman/btool/fdt_add_pubkey.py
@@ -32,6 +32,10 @@
verified for the image / configuration to be considered valid.
algo (str): Cryptographic algorithm. Optional parameter,
default value: sha1,rsa2048
+
+ Returns:
+ CommandResult: Resulting output from the bintool, or None if the
+ tool is not present
"""
args = []
if algo: