diff --git a/drivers/firmware/qcom_scm-smc.c b/drivers/firmware/qcom_scm-smc.c
index 27cce454c86a..3d736c74a60d 100644
--- a/drivers/firmware/qcom_scm-smc.c
+++ b/drivers/firmware/qcom_scm-smc.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2015,2020 The Linux Foundation. All rights reserved.
+/* Copyright (c) 2015,2020-2021 The Linux Foundation. All rights reserved.
  */
 
 #include <linux/io.h>
@@ -2020,6 +2020,38 @@ int __qcom_scm_request_encrypted_log(struct device *dev, phys_addr_t buf,
 	return ret ? : desc.res[0];
 }
 
+int __qcom_scm_invoke_smc_legacy(struct device *dev, phys_addr_t in_buf,
+        size_t in_buf_size, phys_addr_t out_buf, size_t out_buf_size,
+        int32_t *result, u64 *response_type, unsigned int *data)
+{
+	int ret;
+	struct qcom_scm_desc desc = {
+		.svc = QCOM_SCM_SVC_SMCINVOKE,
+		.cmd = QCOM_SCM_SMCINVOKE_INVOKE_LEGACY,
+		.owner = ARM_SMCCC_OWNER_TRUSTED_OS
+	};
+
+	desc.args[0] = in_buf;
+	desc.args[1] = in_buf_size;
+	desc.args[2] = out_buf;
+	desc.args[3] = out_buf_size;
+	desc.arginfo = QCOM_SCM_ARGS(4, QCOM_SCM_RW, QCOM_SCM_VAL, QCOM_SCM_RW,
+					QCOM_SCM_VAL);
+
+	ret = qcom_scm_call(dev, &desc);
+
+	if (result)
+		*result = desc.res[1];
+
+	if (response_type)
+		*response_type = desc.res[0];
+
+	if (data)
+		*data = desc.res[2];
+
+	return ret;
+}
+
 int __qcom_scm_invoke_smc(struct device *dev, phys_addr_t in_buf,
 	size_t in_buf_size, phys_addr_t out_buf, size_t out_buf_size,
 	int32_t *result, u64 *response_type, unsigned int *data)
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 0b20d4af4c09..33b3c188bb81 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -980,6 +980,15 @@ int qcom_scm_request_encrypted_log(phys_addr_t buf, size_t len,
 }
 EXPORT_SYMBOL(qcom_scm_request_encrypted_log);
 
+int qcom_scm_invoke_smc_legacy(phys_addr_t in_buf, size_t in_buf_size,
+		phys_addr_t out_buf, size_t out_buf_size, int32_t *result,
+		u64 *response_type, unsigned int *data)
+{
+	return __qcom_scm_invoke_smc_legacy(__scm->dev, in_buf, in_buf_size, out_buf,
+		out_buf_size, result, response_type, data);
+}
+EXPORT_SYMBOL(qcom_scm_invoke_smc_legacy);
+
 int qcom_scm_invoke_smc(phys_addr_t in_buf, size_t in_buf_size,
 		phys_addr_t out_buf, size_t out_buf_size, int32_t *result,
 		u64 *response_type, unsigned int *data)
diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
index 60ba9b8a67a9..9406a82f23bc 100644
--- a/drivers/firmware/qcom_scm.h
+++ b/drivers/firmware/qcom_scm.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* Copyright (c) 2010-2015,2020 The Linux Foundation. All rights reserved.
+/* Copyright (c) 2010-2015,2020-2021 The Linux Foundation. All rights reserved.
  */
 #ifndef __QCOM_SCM_INT_H
 #define __QCOM_SCM_INT_H
@@ -260,8 +260,12 @@ extern int __qcom_scm_request_encrypted_log(struct device *dev, phys_addr_t buf,
 extern int __qcom_scm_ice_restore_cfg(struct device *dev);
 
 #define QCOM_SCM_SVC_SMCINVOKE		0x06
+#define QCOM_SCM_SMCINVOKE_INVOKE_LEGACY   0x00
 #define QCOM_SCM_SMCINVOKE_INVOKE	0x02
 #define QCOM_SCM_SMCINVOKE_CB_RSP	0x01
+extern int __qcom_scm_invoke_smc_legacy(struct device *dev, phys_addr_t in_buf,
+		size_t in_buf_size, phys_addr_t out_buf, size_t out_buf_size,
+		int32_t *result, u64 *response_type, unsigned int *data);
 extern int __qcom_scm_invoke_smc(struct device *dev, phys_addr_t in_buf,
 		size_t in_buf_size, phys_addr_t out_buf, size_t out_buf_size,
 		int32_t *result, u64 *response_type, unsigned int *data);
diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
index 2f73d491dc71..cb799791f626 100644
--- a/include/linux/qcom_scm.h
+++ b/include/linux/qcom_scm.h
@@ -192,6 +192,9 @@ extern int qcom_scm_register_qsee_log_buf(phys_addr_t buf, size_t len);
 extern int qcom_scm_query_encrypted_log_feature(u64 *enabled);
 extern int qcom_scm_request_encrypted_log(phys_addr_t buf, size_t len,
 						uint32_t log_id);
+extern int qcom_scm_invoke_smc_legacy(phys_addr_t in_buf, size_t in_buf_size,
+		phys_addr_t out_buf, size_t out_buf_size, int32_t *result,
+		u64 *response_type, unsigned int *data);
 extern int qcom_scm_invoke_smc(phys_addr_t in_buf, size_t in_buf_size,
 		phys_addr_t out_buf, size_t out_buf_size, int32_t *result,
 		u64 *response_type, unsigned int *data);
@@ -365,6 +368,9 @@ static inline int qcom_scm_query_encrypted_log_feature(u64 *enabled)
 static inline int qcom_scm_request_encrypted_log(phys_addr_t buf, size_t len,
 						uint32_t log_id)
 		{ return -ENODEV; }
+static inline int qcom_scm_invoke_smc_legacy(phys_addr_t in_buf, size_t in_buf_size,
+		phys_addr_t out_buf, size_t out_buf_size, int32_t *result,
+		u64 *request_type, unsigned int *data)  { return -ENODEV; }
 static inline int qcom_scm_invoke_smc(phys_addr_t in_buf, size_t in_buf_size,
 		phys_addr_t out_buf, size_t out_buf_size, int32_t *result,
 		u64 *request_type, unsigned int *data)	{ return -ENODEV; }