diff --git a/plat/brcm/board/stingray/include/sr_def.h b/plat/brcm/board/stingray/include/sr_def.h
index be0dee1..277836e 100644
--- a/plat/brcm/board/stingray/include/sr_def.h
+++ b/plat/brcm/board/stingray/include/sr_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020, Broadcom
+ * Copyright (c) 2016-2021, Broadcom
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -193,6 +193,11 @@
 #define PLAT_CHIP_REV_GET	(mmio_read_32(ICFG_CHIP_REVISION_ID))
 
 /*******************************************************************************
+ * CMIC MII (MDIO) related constant
+ ******************************************************************************/
+#define PLAT_CMIC_MIIM_BASE	0x68920000U
+
+/*******************************************************************************
  * Timers related constants
  ******************************************************************************/
 /* ChipcommonG_tim0_TIM_TIMER1Load 0x68930000 */
diff --git a/plat/brcm/board/stingray/platform.mk b/plat/brcm/board/stingray/platform.mk
index c5509bb..7fcf373 100644
--- a/plat/brcm/board/stingray/platform.mk
+++ b/plat/brcm/board/stingray/platform.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2019-2020, Broadcom
+# Copyright (c) 2019-2021, Broadcom
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -190,7 +190,8 @@
 				plat/${SOC_DIR}/src/tz_sec.c \
 				drivers/arm/tzc/tzc400.c \
 				plat/${SOC_DIR}/driver/plat_emmc.c \
-				plat/${SOC_DIR}/src/topology.c
+				plat/${SOC_DIR}/src/topology.c \
+				drivers/brcm/mdio/mdio.c
 
 ifeq (${USE_CHIMP},yes)
 PLAT_BL_COMMON_SOURCES	+=	drivers/brcm/chimp.c