Add FIT signing options to config

Also add [-f] to the help message as it was missing.

Signed-off-by: Brian Woods <brian.woods@xilinx.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/README.md b/README.md
index bf6e374..b87a199 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,8 @@ UBOOT_SOURCE="boot.source"
 UBOOT_SCRIPT="boot.scr"
 FDTEDIT="imagebuilder.dtb"
 FIT="boot.fit"
+FIT_ENC_KEY_DIR="dir/key"
+FIT_ENC_UB_DTB="uboot.dtb"
 ```
 
 Where:
@@ -133,6 +135,14 @@ Where:
 - FIT is an optional and is off by default.  Specifies using a fit image
   for booting rather than individual files.
 
+- FIT_ENC_KEY_DIR is optional but specifies the directory and hint used
+  for signing a FIT image.  The CLI arguments overwrite what's in the
+  config.  See the -u option below for more information.
+
+- FIT_ENC_UB_DTB is optional but specifies the u-boot dtb to modify and
+  include the public key in.  This can only be used with
+  FIT_ENC_KEY_DIR.  See the -u option below for more information.
+
 Then you can invoke uboot-script-gen as follows:
 
 ```