[U-Boot] [PATCH 02/10][v6] FIT: Modify option FIT_SIGNATURE in Kconfig

[Ruchika Gupta]

For FIT signature based approach to work, RSA library needs to be selected.
The FIT_SIGNATURE option in Kconfig is modified to automatically select RSA.
Selecting RSA compiles the RSA library required for image verification.

Signed-off-by: Ruchika Gupta <ruchika.gupta at freescale.com>
CC: Simon Glass <sjg at chromium.org>
Acked-by: Simon Glass <sjg at chromium.org>
---
Changes in v6:
No Changes

Changes in v5:
Word wrapping in commit
Added space after .

Changes in v4:
Expanded CONFIG_RSA with documentation link

Changes in v3:
New patch created for adding Kconfig option for FIT signature

 Kconfig     | 3 ++-
 lib/Kconfig | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Kconfig b/Kconfig
index 4157da3..fed488f 100644
--- a/Kconfig
+++ b/Kconfig
@@ -116,8 +116,9 @@ config FIT_VERBOSE
 	depends on FIT
 
 config FIT_SIGNATURE
-	bool "Enabel signature verification of FIT uImages"
+	bool "Enable signature verification of FIT uImages"
 	depends on FIT
+	select RSA
 	help
 	  This option enables signature verification of FIT uImages,
 	  using a hash signed and verified using RSA.
diff --git a/lib/Kconfig b/lib/Kconfig
index 8460439..79b91b7 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -27,4 +27,11 @@ config SYS_HZ
 	  get_timer() must operate in milliseconds and this option must be
 	  set to 1000.
 
+config RSA
+	bool "Use RSA Library"
+	help
+	  RSA support. This enables the RSA algorithm used for FIT image
+	  verification in U-Boot.
+	  See doc/uImage.FIT/signature.txt for more details.
+
 endmenu
-- 
1.8.1.4