[U-Boot] [PATCH 7/9] [v4] lib/rsa: Add Kconfig for devices supporting RSA Modular Exponentiation

[Ruchika Gupta]

Kconfig option added for devices which support RSA Verification.
1. RSA_SOFTWARE_EXP
Enables driver for supporting RSA Modular Exponentiation in Software
2. RSA_FREESCALE_EXP
Enables driver for supporting RSA Modular Exponentiation using Freescale specific
driver

The above drivers use RSA uclass

Signed-off-by: Ruchika Gupta <ruchika.gupta at freescale.com>
CC: Simon Glass <sjg at chromium.org>
---
Changes in v4:
Introduced 2 options when CONFIG_RSA is selected:
RSA_SOFTWARE_EXP
RSA_FREESCALE_EXP

Removed RSA_HW. Changes the name pf RSA_SW to RSA_SOFTWARE_EXP

Changes in v3:
New patch

 lib/Kconfig     | 10 +---------
 lib/rsa/Kconfig | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 9 deletions(-)
 create mode 100644 lib/rsa/Kconfig

diff --git a/lib/Kconfig b/lib/Kconfig
index f317f81..a1f30a2 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -27,14 +27,6 @@ config SYS_HZ
 	  get_timer() must operate in milliseconds and this option must be
 	  set to 1000.
 
-config RSA
-	bool "Use RSA Library"
-	depends on DM
-	help
-	  RSA support.This enables the RSA algorithm used for FIT image
-	  verification in U-Boot. RSA support for Modular exponentiation
-	  is implemented as a driver model. Driver Model should be enabled
-	  to select this option.
-	  See doc/uImage.FIT/signature.txt for more details.
+source lib/rsa/Kconfig
 
 endmenu
diff --git a/lib/rsa/Kconfig b/lib/rsa/Kconfig
new file mode 100644
index 0000000..14155b9
--- /dev/null
+++ b/lib/rsa/Kconfig
@@ -0,0 +1,30 @@
+config RSA
+	bool "Use RSA Library"
+	depends on DM
+	select RSA_FREESCALE_EXP if FSL_CAAM
+	select RSA_SOFTWARE_EXP if !RSA_FREESCALE_EXP
+	help
+	  RSA support.This enables the RSA algorithm used for FIT image
+	  verification in U-Boot. RSA support for Modular exponentiation
+	  is implemented as a driver model. Driver Model should be enabled
+	  to select this option.
+	  See doc/uImage.FIT/signature.txt for more details.
+
+if RSA
+config RSA_SOFTWARE_EXP
+	bool "Enable driver for RSA Modular Exponentiation in software"
+	depends on DM && RSA
+	help
+	  Enables driver for modular exponentiation in software. This is a RSA
+	  algorithm used in FIT image verification. It required RSA Key as
+	  input.
+	  See doc/uImage.FIT/signature.txt for more details.
+
+config RSA_FREESCALE_EXP
+	bool "Enable RSA Modular Exponentiation with FSL crypto accelerator"
+	depends on DM && RSA && FSL_CAAM
+	help
+	Enables driver for RSA modular exponentiation using Freescale cryptographic
+	accelerator - CAAM.
+
+endif
-- 
1.8.1.4