1 files changed, 3 insertions, 1 deletions

diff --git a/Kconfig b/Kconfig
index 75bab7f6cc..fb012cfb3e 100644
--- a/Kconfig
+++ b/Kconfig
@@ -141,7 +141,9 @@ config FIT_SIGNATURE
 	select RSA
 	help
 	  This option enables signature verification of FIT uImages,
-	  using a hash signed and verified using RSA.
+	  using a hash signed and verified using RSA. If
+	  CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
+	  hashing is available using hardware, RSA library will use it.
 	  See doc/uImage.FIT/signature.txt for more details.
 
 config SYS_EXTRA_OPTIONS