diff --git a/include/drivers/arm/css/css_mhu_doorbell.h b/include/drivers/arm/css/css_mhu_doorbell.h
index 88302fd7b..d6c1a2a81 100644
--- a/include/drivers/arm/css/css_mhu_doorbell.h
+++ b/include/drivers/arm/css/css_mhu_doorbell.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -22,6 +22,10 @@
 #define SENDER_REG_STAT(_channel)	(0x20 * (_channel))
 #define SENDER_REG_SET(_channel)	((0x20 * (_channel)) + 0xC)
 
+#define MHU_V3_PBX_PDBCW_PAGE_OFFSET		UL(0x1000)
+#define MHU_V3_SENDER_REG_SET(_channel)		(MHU_V3_PBX_PDBCW_PAGE_OFFSET + \
+						 SENDER_REG_SET(_channel))
+
 /* Helper macro to ring doorbell */
 #define MHU_RING_DOORBELL(addr, modify_mask, preserve_mask)	do {	\
 		uint32_t db = mmio_read_32(addr) & (preserve_mask);	\
diff --git a/plat/arm/board/tc/tc_bl31_setup.c b/plat/arm/board/tc/tc_bl31_setup.c
index 909a8b56a..d6b0311db 100644
--- a/plat/arm/board/tc/tc_bl31_setup.c
+++ b/plat/arm/board/tc/tc_bl31_setup.c
@@ -50,6 +50,7 @@ psa_status_t mbedtls_psa_external_get_random(
 }
 #endif /* PLATFORM_TEST_TFM_TESTSUITE */
 
+#if TARGET_PLATFORM <= 2
 static scmi_channel_plat_info_t tc_scmi_plat_info = {
 	.scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE,
 	.db_reg_addr = PLAT_CSS_MHU_BASE + SENDER_REG_SET(0),
@@ -57,6 +58,15 @@ static scmi_channel_plat_info_t tc_scmi_plat_info = {
 	.db_modify_mask = 0x1,
 	.ring_doorbell = &mhuv2_ring_doorbell,
 };
+#elif TARGET_PLATFORM == 3
+static scmi_channel_plat_info_t tc_scmi_plat_info = {
+	.scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE,
+	.db_reg_addr = PLAT_CSS_MHU_BASE + MHU_V3_SENDER_REG_SET(0),
+	.db_preserve_mask = 0xfffffffe,
+	.db_modify_mask = 0x1,
+	.ring_doorbell = &mhu_ring_doorbell,
+};
+#endif
 
 void bl31_platform_setup(void)
 {