diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index ccbeb5c..abceede 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -54,4 +54,19 @@
 
 source "board/st/stm32mp1/Kconfig"
 
+# currently activated for debug / should be deactivated for real product
+if DEBUG_UART
+
+config DEBUG_UART_BOARD_INIT
+	default y
+
+# debug on UART4 by default
+config DEBUG_UART_BASE
+	default 0x40010000
+
+# clock source is HSI on reset
+config DEBUG_UART_CLOCK
+	default 64000000
+endif
+
 endif