diff --git a/plat/mediatek/common/custom/oem_svc.c b/plat/mediatek/common/custom/oem_svc.c
deleted file mode 100644
index 27ee6aa..0000000
--- a/plat/mediatek/common/custom/oem_svc.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <assert.h>
-#include <stdint.h>
-
-#include <arch.h>
-#include <arch_helpers.h>
-#include <common/debug.h>
-#include <common/runtime_svc.h>
-#include <plat/common/platform.h>
-#include <tools_share/uuid.h>
-
-#include <oem_svc.h>
-
-/* OEM Service UUID */
-DEFINE_SVC_UUID2(oem_svc_uid,
-	0xd0ad43b9, 0x9b06, 0xe411, 0x91, 0x91,
-	0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66);
-
-/* Setup OEM Services */
-static int32_t oem_svc_setup(void)
-{
-	/*
-	 * Invoke related module setup from here
-	 */
-
-	return 0;
-}
-
-/*******************************************************************************
- * OEM top level handler for servicing SMCs.
- ******************************************************************************/
-uintptr_t oem_smc_handler(uint32_t smc_fid,
-			u_register_t x1,
-			u_register_t x2,
-			u_register_t x3,
-			u_register_t x4,
-			void *cookie,
-			void *handle,
-			u_register_t flags)
-{
-	WARN("Unimplemented OEM Call: 0x%x\n", smc_fid);
-	SMC_RET1(handle, SMC_UNK);
-}
-
-/*
- * Top-level OEM Service SMC handler. This handler will in turn dispatch
- * calls to related SMC handler
- */
-uintptr_t oem_svc_smc_handler(uint32_t smc_fid,
-			 u_register_t x1,
-			 u_register_t x2,
-			 u_register_t x3,
-			 u_register_t x4,
-			 void *cookie,
-			 void *handle,
-			 u_register_t flags)
-{
-	/*
-	 * Dispatch OEM calls to OEM Common handler and return its return value
-	 */
-	if (is_oem_fid(smc_fid)) {
-		return oem_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
-					handle, flags);
-	}
-
-	switch (smc_fid) {
-	case OEM_SVC_CALL_COUNT:
-		/*
-		 * Return the number of OEM Service Calls.
-		 */
-		SMC_RET1(handle, OEM_SVC_NUM_CALLS);
-
-	case OEM_SVC_UID:
-		/* Return UID to the caller */
-		SMC_UUID_RET(handle, oem_svc_uid);
-
-	case OEM_SVC_VERSION:
-		/* Return the version of current implementation */
-		SMC_RET2(handle, OEM_VERSION_MAJOR, OEM_VERSION_MINOR);
-
-	default:
-		WARN("Unimplemented OEM Service Call: 0x%x\n", smc_fid);
-		SMC_RET1(handle, SMC_UNK);
-	}
-}
-
-/* Register OEM Service Calls as runtime service */
-DECLARE_RT_SVC(
-		oem_svc,
-		OEN_OEM_START,
-		OEN_OEM_END,
-		SMC_TYPE_FAST,
-		oem_svc_setup,
-		oem_svc_smc_handler
-);
diff --git a/plat/mediatek/common/custom/oem_svc.h b/plat/mediatek/common/custom/oem_svc.h
deleted file mode 100644
index 76f7c24..0000000
--- a/plat/mediatek/common/custom/oem_svc.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#ifndef OEM_SVC_H
-#define OEM_SVC_H
-
-/*******************************************************************************
- * Defines for runtime services func ids
- ******************************************************************************/
-/*
- * Number of OEM calls (above) implemented.
- */
-#define OEM_SVC_NUM_CALLS		3
-
-/*******************************************************************************
- * Defines for OEM Service queries
- ******************************************************************************/
-/* 0x83000000 - 0x8300FEFF is OEM service calls */
-#define OEM_SVC_CALL_COUNT		0x8300ff00
-#define OEM_SVC_UID			0x8300ff01
-/* 0x8300ff02 is reserved */
-#define OEM_SVC_VERSION			0x8300ff03
-/* 0x8300ff04 - 0x8300FFFF is reserved for future expansion */
-
-/* OEM Service Calls version numbers */
-#define OEM_VERSION_MAJOR		0x0
-#define OEM_VERSION_MINOR		0x1
-
-/* The macros below are used to identify OEM calls from the SMC function ID */
-/* SMC32 ID range from 0x83000000 to 0x83000FFF */
-/* SMC64 ID range from 0xC3000000 to 0xC3000FFF */
-#define OEM_FID_MASK			0xf000u
-#define OEM_FID_VALUE			0u
-#define is_oem_fid(_fid) \
-	(((_fid) & OEM_FID_MASK) == OEM_FID_VALUE)
-
-#define OEM_SVC_E_SUCCESS		0
-#define OEM_SVC_E_NOT_SUPPORTED		-1
-#define OEM_SVC_E_INVALID_PARAMS	-2
-
-#endif /* OEM_SVC_H */