diff --git a/arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.series b/arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.series
index 9807b96161c..3c3e5ec29b1 100644
--- a/arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.series
+++ b/arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.series
@@ -13,10 +13,4 @@ source "arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.stm32l4*"
 config SOC_SERIES
 	default stm32l4
 
-if !HAS_DTS
-config NUM_IRQ_PRIO_BITS
-	int
-	default 4
-endif # !HAS_DTS
-
 endif # SOC_SERIES_STM32L4X
diff --git a/arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.stm32l476xx b/arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.stm32l476xx
index 9a4ff286d7a..676cc6c67f4 100644
--- a/arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.stm32l476xx
+++ b/arch/arm/soc/st_stm32/stm32l4/Kconfig.defconfig.stm32l476xx
@@ -12,15 +12,6 @@ config SOC
 	string
 	default stm32l476xx
 
-if !HAS_DTS
-config SRAM_SIZE
-	default 96
-
-config FLASH_SIZE
-	default 1024
-
-endif # !HAS_DTS
-
 config NUM_IRQS
 	int
 	default 82
diff --git a/boards/arm/nucleo_l476rg/nucleo_l476rg_defconfig b/boards/arm/nucleo_l476rg/nucleo_l476rg_defconfig
index 1d8dfd0bd03..7bb2cd984c1 100644
--- a/boards/arm/nucleo_l476rg/nucleo_l476rg_defconfig
+++ b/boards/arm/nucleo_l476rg/nucleo_l476rg_defconfig
@@ -11,7 +11,6 @@ CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=80000000
 CONFIG_SERIAL=y
 CONFIG_UART_STM32=y
 CONFIG_UART_STM32_PORT_2=y
-CONFIG_UART_STM32_PORT_2_BAUD_RATE=115200
 
 # enable pinmux
 CONFIG_PINMUX=y