u-boot/lib/rsa/Kconfig
Eugeniu Rosca 39883af3f0 lib/rsa: Kconfig: Remove superfluous 'depends on RSA'
RSA_SOFTWARE_EXP and RSA_FREESCALE_EXP are wrapped inside:

if RSA
	...
endif

So, remove the redundant "depends on RSA" from their depends expression.
In addition, move SPL_RSA into the same "if RSA ... endif" block, since
its only direct dependeny is CONFIG_RSA. This tidies up and simplifies
reading of lib/rsa/Kconfig.

No functional change intended.

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2018-04-28 10:42:35 -04:00

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config RSA
bool "Use RSA Library"
select RSA_FREESCALE_EXP if FSL_CAAM && !ARCH_MX7 && !ARCH_MX6 && !ARCH_MX5
select RSA_SOFTWARE_EXP if !RSA_FREESCALE_EXP
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.
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 SPL_RSA
bool "Use RSA Library within SPL"
config RSA_SOFTWARE_EXP
bool "Enable driver for RSA Modular Exponentiation in software"
depends on DM
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 && FSL_CAAM && !ARCH_MX7 && !ARCH_MX6 && !ARCH_MX5
help
Enables driver for RSA modular exponentiation using Freescale cryptographic
accelerator - CAAM.
endif