dts: gd32e103: add i2c support.

add i2c node in dts.

Signed-off-by: YuLong Yao <[email protected]>

Author: feilongfl

dts/arm/gigadevice/gd32e10x/gd32e10x.dtsi

@@ -7,6 +7,7 @@
 #include <arm/armv7-m.dtsi>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/pwm/pwm.h>
+#include <dt-bindings/i2c/i2c.h>
 
 / {
 	cpus {
@@ -88,6 +89,32 @@
 			label = "USART_4";
 		};
 
+		i2c0: i2c@40005400 {
+			compatible = "gd,gd32-i2c";
+			reg = <0x40005400 0x400>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			clock-frequency = <I2C_BITRATE_STANDARD>;
+			interrupts = <31 0>, <32 0>;
+			interrupt-names = "event", "error";
+			rcu-periph-clock = <0x715>;
+			status = "disabled";
+			label = "I2C_0";
+		};
+
+		i2c1: i2c@40005800 {
+			compatible = "gd,gd32-i2c";
+			reg = <0x40005800 0x400>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			clock-frequency = <I2C_BITRATE_STANDARD>;
+			interrupts = <33 0>, <34 0>;
+			interrupt-names = "event", "error";
+			rcu-periph-clock = <0x716>;
+			status = "disabled";
+			label = "I2C_1";
+		};
+
 		afio: afio@40010000 {
 			compatible = "gd,gd32-afio";
 			reg = <0x40010000 0x400>;