diff --git a/include/drivers/st/stm32mp1_rcc.h b/include/drivers/st/stm32mp1_rcc.h
index 4b4aac8..2ffc3b2 100644
--- a/include/drivers/st/stm32mp1_rcc.h
+++ b/include/drivers/st/stm32mp1_rcc.h
@@ -250,6 +250,8 @@
 #define RCC_MPCKSELR_HSE		0x00000001
 #define RCC_MPCKSELR_PLL		0x00000002
 #define RCC_MPCKSELR_PLL_MPUDIV		0x00000003
+#define RCC_MPCKSELR_MPUSRC_MASK	GENMASK(1, 0)
+#define RCC_MPCKSELR_MPUSRC_SHIFT	0
 
 /* Values of RCC_ASSCKSELR register */
 #define RCC_ASSCKSELR_HSI		0x00000000
@@ -266,6 +268,8 @@
 #define RCC_CPERCKSELR_HSI		0x00000000
 #define RCC_CPERCKSELR_CSI		0x00000001
 #define RCC_CPERCKSELR_HSE		0x00000002
+#define RCC_CPERCKSELR_PERSRC_MASK	GENMASK(1, 0)
+#define RCC_CPERCKSELR_PERSRC_SHIFT	0
 
 /* Used for most of DIVR register: max div for RTC */
 #define RCC_DIVR_DIV_MASK		GENMASK(5, 0)