config DM_HASH bool "Enable Driver Model for Hash" depends on DM help If you want to use driver model for Hash, say Y. config HASH_SOFTWARE bool "Enable driver for Hash in software" depends on DM_HASH depends on MD5 depends on SHA1 depends on SHA256 depends on SHA512_ALGO help Enable driver for hashing operations in software. Currently it support multiple hash algorithm including CRC/MD5/SHA.