[PATCH v2 2/5] ARM: dts: stm32: add usart3 node to stm32mp15xx-dkx boards

[Erwan Le Ray]

Adds usart3 node to stm32mp15xx-dkx and usart3 alias to stm32mp157a-dk1
and stm32mp157c-dk2 boards. usart3 pins are connected to GPIO Expansion
connector. usart3 is disabled by default.

Signed-off-by: Erwan Le Ray <erwan.le...@st.com>

diff --git a/arch/arm/boot/dts/stm32mp157a-dk1.dts 
b/arch/arm/boot/dts/stm32mp157a-dk1.dts
index d03d4cd2606a..65ee61b7667a 100644
--- a/arch/arm/boot/dts/stm32mp157a-dk1.dts
+++ b/arch/arm/boot/dts/stm32mp157a-dk1.dts
@@ -18,6 +18,7 @@
        aliases {
                ethernet0 = &ethernet0;
                serial0 = &uart4;
+               serial1 = &usart3;
        };
 
        chosen {
diff --git a/arch/arm/boot/dts/stm32mp157c-dk2.dts 
b/arch/arm/boot/dts/stm32mp157c-dk2.dts
index 9a8a26710ac1..fb690a817e28 100644
--- a/arch/arm/boot/dts/stm32mp157c-dk2.dts
+++ b/arch/arm/boot/dts/stm32mp157c-dk2.dts
@@ -19,6 +19,7 @@
        aliases {
                ethernet0 = &ethernet0;
                serial0 = &uart4;
+               serial1 = &usart3;
        };
 
        chosen {
diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi 
b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
index e5fdbc149bf4..243aa4b2063d 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
@@ -591,6 +591,15 @@
        status = "okay";
 };
 
+&usart3 {
+       pinctrl-names = "default", "sleep", "idle";
+       pinctrl-0 = <&usart3_pins_c>;
+       pinctrl-1 = <&usart3_sleep_pins_c>;
+       pinctrl-2 = <&usart3_idle_pins_c>;
+       uart-has-rtscts;
+       status = "disabled";
+};
+
 &usbh_ehci {
        phys = <&usbphyc_port0>;
        status = "okay";
-- 
2.17.1