mkimage: Add -r option to specify keys that must be verified

[oweals/u-boot.git] / doc / mkimage.1

diff --git a/doc/mkimage.1 b/doc/mkimage.1
index b67a35178a0fec45521e27e8242216213df1f0a5..14374da88af0fff839ce105f5e25e9849e7baec9 100644 (file)
--- a/doc/mkimage.1
+++ b/doc/mkimage.1
@@ -133,6 +133,12 @@ the corresponding public key is written into this file for for run-time
 verification. Typically the file here is the device tree binary used by
 CONFIG_OF_CONTROL in U-Boot.
 
+.TP
+.BI "\-r
+Specifies that keys used to sign the FIT are required. This means that they
+must be verified for the image to boot. Without this option, the verification
+will be optional (useful for testing but not for release).
+
 .SH EXAMPLES
 
 List image information: