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-rw-r--r--lib/rsa/Kconfig6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/rsa/Kconfig b/lib/rsa/Kconfig
index 1268a1b2dbe..86df0a0dd83 100644
--- a/lib/rsa/Kconfig
+++ b/lib/rsa/Kconfig
@@ -6,6 +6,12 @@ config RSA
RSA support. This enables the RSA algorithm used for FIT image
verification in U-Boot.
See doc/uImage.FIT/signature.txt for more details.
+ The Modular Exponentiation algorithm in RSA is implemented using
+ driver model. So CONFIG_DM needs to be enabled by default for this
+ library to function.
+ The signing part is build into mkimage regardless of this
+ option. The software based modular exponentiation is built into
+ mkimage irrespective of this option.
if RSA
config RSA_SOFTWARE_EXP