ARM: dts: stm32: add reset support to uart nodes on stm32mp15x
STM32 serial IP can be reset via reset controller.
Add the support of reset to uart nodes on stm32mp15-u-boot.dtsi,
the ad-dons file for U-Boot.
This patch fix issues when previous UART configuration, for example
done in TF-A or ROM code, is not handled in U-Boot stm32 serial driver
init.
This reset property won't be not added in Linux kernel device tree
as this reset is not used in Linux STM32 serial driver.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/dts/stm32mp15-u-boot.dtsi b/arch/arm/dts/stm32mp15-u-boot.dtsi
index 42e2e2e..7ec90fe 100644
--- a/arch/arm/dts/stm32mp15-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp15-u-boot.dtsi
@@ -189,6 +189,38 @@
compatible = "st,stm32-sdmmc2", "arm,pl18x", "arm,primecell";
};
+&usart1 {
+ resets = <&rcc USART1_R>;
+};
+
+&usart2 {
+ resets = <&rcc USART2_R>;
+};
+
+&usart3 {
+ resets = <&rcc USART3_R>;
+};
+
+&uart4 {
+ resets = <&rcc UART4_R>;
+};
+
+&uart5 {
+ resets = <&rcc UART5_R>;
+};
+
+&usart6 {
+ resets = <&rcc USART6_R>;
+};
+
+&uart7 {
+ resets = <&rcc UART7_R>;
+};
+
+&uart8{
+ resets = <&rcc UART8_R>;
+};
+
&usbotg_hs {
compatible = "st,stm32mp1-hsotg", "snps,dwc2";
};