diff --git a/drivers/ram/stm32mp1/stm32mp1_ddr.h b/drivers/ram/stm32mp1/stm32mp1_ddr.h
index 861efff..3621e6c 100644
--- a/drivers/ram/stm32mp1/stm32mp1_ddr.h
+++ b/drivers/ram/stm32mp1/stm32mp1_ddr.h
@@ -105,12 +105,14 @@
 	u32 pcfgqos1_0;
 	u32 pcfgwqos0_0;
 	u32 pcfgwqos1_0;
+#if IS_ENABLED(CONFIG_STM32MP15X)
 	u32 pcfgr_1;
 	u32 pcfgw_1;
 	u32 pcfgqos0_1;
 	u32 pcfgqos1_1;
 	u32 pcfgwqos0_1;
 	u32 pcfgwqos1_1;
+#endif
 };
 
 struct stm32mp1_ddrphy_reg {
@@ -123,8 +125,10 @@
 	u32 zq0cr1;
 	u32 dx0gcr;
 	u32 dx1gcr;
+#if IS_ENABLED(CONFIG_STM32MP15X)
 	u32 dx2gcr;
 	u32 dx3gcr;
+#endif
 };
 
 struct stm32mp1_ddrphy_timing {
@@ -181,4 +185,6 @@
 	enum stm32mp1_ddr_interact_step step,
 	const struct stm32mp1_ddr_config *config);
 
+bool is_stm32mp13_ddrc(const struct ddr_info *priv);
+
 #endif