diff --git a/drivers/st/ddr/stm32mp2_ddr_helpers.c b/drivers/st/ddr/stm32mp2_ddr_helpers.c
new file mode 100644
index 0000000..e6be9dd
--- /dev/null
+++ b/drivers/st/ddr/stm32mp2_ddr_helpers.c
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2024, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <lib/mmio.h>
+
+#include <platform_def.h>
+
+void ddr_sub_system_clk_init(void)
+{
+	mmio_write_32(stm32mp_rcc_base() + RCC_DDRCPCFGR,
+		      RCC_DDRCPCFGR_DDRCPEN | RCC_DDRCPCFGR_DDRCPLPEN);
+}