diff --git a/plat/intel/soc/common/include/socfpga_fcs.h b/plat/intel/soc/common/include/socfpga_fcs.h
index f58f9fa..f5cab14 100644
--- a/plat/intel/soc/common/include/socfpga_fcs.h
+++ b/plat/intel/soc/common/include/socfpga_fcs.h
@@ -78,6 +78,7 @@
 #define FCS_SHA_HMAC_CRYPTO_PARAM_SIZE_OFFSET	8U
 
 #define FCS_ECDSA_GET_PUBKEY_MAX_WORD_SIZE	5U
+#define FCS_ECDSA_SHA2_DATA_SIGN_CMD_MAX_WORD_SIZE	7U
 /* FCS Payload Structure */
 typedef struct fcs_rng_payload_t {
 	uint32_t session_id;
@@ -236,6 +237,15 @@
 				uint64_t dst_addr, uint32_t *dst_size,
 				uint32_t data_size, uint32_t *mbox_error);
 
+int intel_fcs_ecdsa_sha2_data_sign_init(uint32_t session_id,
+				uint32_t context_id, uint32_t key_id,
+				uint32_t param_size, uint64_t param_data,
+				uint32_t *mbox_error);
+int intel_fcs_ecdsa_sha2_data_sign_finalize(uint32_t session_id,
+				uint32_t context_id, uint32_t src_addr,
+				uint32_t src_size, uint64_t dst_addr,
+				uint32_t *dst_size, uint32_t *mbox_error);
+
 int intel_fcs_ecdsa_get_pubkey_init(uint32_t session_id, uint32_t context_id,
 				uint32_t key_id, uint32_t param_size,
 				uint64_t param_data, uint32_t *mbox_error);
diff --git a/plat/intel/soc/common/include/socfpga_mailbox.h b/plat/intel/soc/common/include/socfpga_mailbox.h
index 1d749a0..e5e1d14 100644
--- a/plat/intel/soc/common/include/socfpga_mailbox.h
+++ b/plat/intel/soc/common/include/socfpga_mailbox.h
@@ -78,6 +78,7 @@
 #define MBOX_FCS_AES_CRYPT_REQ				0x81
 #define MBOX_FCS_GET_DIGEST_REQ				0x82
 #define MBOX_FCS_MAC_VERIFY_REQ				0x83
+#define MBOX_FCS_ECDSA_SHA2_DATA_SIGN_REQ		0x85
 #define MBOX_FCS_ECDSA_GET_PUBKEY			0x88
 #define MBOX_FCS_OPEN_CS_SESSION			0xA0
 #define MBOX_FCS_CLOSE_CS_SESSION			0xA1
diff --git a/plat/intel/soc/common/include/socfpga_sip_svc.h b/plat/intel/soc/common/include/socfpga_sip_svc.h
index ff13af9..14be92b 100644
--- a/plat/intel/soc/common/include/socfpga_sip_svc.h
+++ b/plat/intel/soc/common/include/socfpga_sip_svc.h
@@ -100,6 +100,8 @@
 #define INTEL_SIP_SMC_FCS_GET_DIGEST_FINALIZE		0xC2000079
 #define INTEL_SIP_SMC_FCS_MAC_VERIFY_INIT		0xC200007A
 #define INTEL_SIP_SMC_FCS_MAC_VERIFY_FINALIZE		0xC200007C
+#define INTEL_SIP_SMC_FCS_ECDSA_SHA2_DATA_SIGN_INIT	0xC2000080
+#define INTEL_SIP_SMC_FCS_ECDSA_SHA2_DATA_SIGN_FINALIZE	0xC2000082
 #define INTEL_SIP_SMC_FCS_ECDSA_GET_PUBKEY_INIT		0xC2000089
 #define INTEL_SIP_SMC_FCS_ECDSA_GET_PUBKEY_FINALIZE	0xC200008B