boards: gd32f450i_eval: use pinctrl

Enable usage of the pinctrl driver.

Signed-off-by: Gerard Marull-Paretas <[email protected]>

Author: gmarull

boards/arm/gd32f450i_eval/CMakeLists.txt

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2021, Teslabs Engineering S.L.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <dt-bindings/pinctrl/gd32f450i(g-i-k)xx-pinctrl.h>
+
+&pinctrl {
+	usart0_default: usart0_default {
+		group1 {
+			pinmux = <USART0_TX_PA9>, <USART0_RX_PA10>;
+		};
+	};
+};

boards/arm/gd32f450i_eval/board.c

@@ -6,6 +6,7 @@
 /dts-v1/;
 
 #include <gigadevice/gd32f4xx/gd32f450ik.dtsi>
+#include "gd32f450i_eval-pinctrl.dtsi"
 
 / {
 	model = "GigaDevice GD32F450I-EVAL";
@@ -22,4 +23,6 @@
 &usart0 {
 	status = "okay";
 	current-speed = <115200>;
+	pinctrl-0 = <&usart0_default>;
+	pinctrl-names = "default";
 };