[PATCH 4/5] ARM: dts: stm32: add uart7 support to stm32mp15xx-dkx boards

[Erwan Le Ray <erwan.leray@xxxxxx>]

Adds uart7 node to stm32mp15xx-dkx and uart7 alias to stm32mp157a-dk1 and
stm32mp157c-dk2 boards. uart7 pins are connected to Arduino connector.
uart7 is disabled by default.

Signed-off-by: Erwan Le Ray <erwan.leray@xxxxxx>

diff --git a/arch/arm/boot/dts/stm32mp157a-dk1.dts b/arch/arm/boot/dts/stm32mp157a-dk1.dts
index 65ee61b7667a..4c8be9c8eb20 100644
--- a/arch/arm/boot/dts/stm32mp157a-dk1.dts
+++ b/arch/arm/boot/dts/stm32mp157a-dk1.dts
@@ -19,6 +19,7 @@
 		ethernet0 = &ethernet0;
 		serial0 = &uart4;
 		serial1 = &usart3;
+		serial2 = &uart7;
 	};
 
 	chosen {
diff --git a/arch/arm/boot/dts/stm32mp157c-dk2.dts b/arch/arm/boot/dts/stm32mp157c-dk2.dts
index fb690a817e28..ffbae4a8753d 100644
--- a/arch/arm/boot/dts/stm32mp157c-dk2.dts
+++ b/arch/arm/boot/dts/stm32mp157c-dk2.dts
@@ -20,6 +20,7 @@
 		ethernet0 = &ethernet0;
 		serial0 = &uart4;
 		serial1 = &usart3;
+		serial2 = &uart7;
 	};
 
 	chosen {
diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
index 243aa4b2063d..cfbe3e2afef2 100644
--- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
+++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi
@@ -591,6 +591,14 @@
 	status = "okay";
 };
 
+&uart7 {
+	pinctrl-names = "default", "sleep", "idle";
+	pinctrl-0 = <&uart7_pins_c>;
+	pinctrl-1 = <&uart7_sleep_pins_c>;
+	pinctrl-2 = <&uart7_idle_pins_c>;
+	status = "disabled";
+};
+
 &usart3 {
 	pinctrl-names = "default", "sleep", "idle";
 	pinctrl-0 = <&usart3_pins_c>;
-- 
2.17.1