boards: wch: ch32v003f4p6_dev_board: enable i2c and define i2c pins

enabled i2c for ch32v003f4p6_dev_board
added default i2c pins for ch32v003f4p6_dev_board
added i2c as supported

Signed-off-by: Andrei-Edward Popa <andrei.popa105@yahoo.com>

Author: andrei-edward-popa

boards/wch/ch32v003f4p6_dev_board/ch32v003f4p6_dev_board-pinctrl.dtsi

@@ -19,4 +19,12 @@
 			bias-pull-up;
 		};
 	};
+
+	i2c1_default: i2c1_default {
+		group1 {
+			pinmux = <I2C1_SDA_PC1_0>, <I2C1_SCL_PC2_0>;
+			output-high;
+			drive-open-drain;
+		};
+	};
 };

boards/wch/ch32v003f4p6_dev_board/ch32v003f4p6_dev_board.dts

@@ -8,6 +8,9 @@
 #include <wch/ch32v0/ch32v003f4p.dtsi>
 #include "ch32v003f4p6_dev_board-pinctrl.dtsi"
 
+#include <zephyr/dt-bindings/gpio/gpio.h>
+#include <zephyr/dt-bindings/i2c/i2c.h>
+
 / {
 	model = "ch32v003f4p6_dev_board";
 	compatible = "wch,ch32v003";
@@ -46,10 +49,21 @@
 	clocks = <&pll>;
 };
 
+&gpioc {
+	status = "okay";
+};
+
 &gpiod {
 	status = "okay";
 };
 
+&i2c1 {
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_STANDARD>;
+	pinctrl-0 = <&i2c1_default>;
+	pinctrl-names = "default";
+};
+
 &usart1 {
 	status = "okay";
 	current-speed = <115200>;

boards/wch/ch32v003f4p6_dev_board/ch32v003f4p6_dev_board.yaml

@@ -10,3 +10,4 @@ flash: 16
 supported:
   - gpio
   - uart
+  - i2c