config ECDSA bool "Enable ECDSA support" depends on DM help This enables the ECDSA (elliptic curve signature) algorithm for FIT image verification in U-Boot. The ECDSA algorithm is implemented using the driver model, so CONFIG_DM is required by this library. See doc/uImage.FIT/signature.txt for more details. ECDSA is enabled for mkimage regardless of this option. if ECDSA config ECDSA_VERIFY bool "Enable ECDSA verification support in U-Boot." help Allow ECDSA signatures to be recognized and verified in U-Boot. config SPL_ECDSA_VERIFY bool "Enable ECDSA verification support in SPL" depends on SPL help Allow ECDSA signatures to be recognized and verified in SPL. endif