diff --git a/drivers/staging/renesas/rcar/ddr/ddr.mk b/drivers/staging/renesas/rcar/ddr/ddr.mk
new file mode 100644
index 0000000..ef13413
--- /dev/null
+++ b/drivers/staging/renesas/rcar/ddr/ddr.mk
@@ -0,0 +1,13 @@
+#
+# Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+ifeq (${RCAR_LSI},${RCAR_E3})
+    include drivers/staging/renesas/rcar/ddr/ddr_a/ddr_a.mk
+else
+    include drivers/staging/renesas/rcar/ddr/ddr_b/ddr_b.mk
+endif
+
+BL2_SOURCES += drivers/staging/renesas/rcar/ddr/dram_sub_func.c