config RSA bool "Use RSA Library" 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. 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