diff --git a/arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi b/arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi
index 7ea4d8d..a3a8193 100644
--- a/arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi
+++ b/arch/arm/dts/k3-j721e-common-proc-board-u-boot.dtsi
@@ -337,3 +337,15 @@
 &wkup_i2c0 {
 	u-boot,dm-spl;
 };
+
+&main_i2c0 {
+	u-boot,dm-spl;
+};
+
+&main_i2c0_pins_default {
+	u-boot,dm-spl;
+};
+
+&exp2 {
+	u-boot,dm-spl;
+};
diff --git a/arch/arm/dts/k3-j721e-r5-common-proc-board.dts b/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
index 585cc83..1f14d71 100644
--- a/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
+++ b/arch/arm/dts/k3-j721e-r5-common-proc-board.dts
@@ -140,6 +140,13 @@
 			J721E_IOPAD(0x25c, PIN_INPUT, 0) /* (R28) MMC1_SDWP */
 		>;
 	};
+
+	main_i2c0_pins_default: main-i2c0-pins-default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0x220, PIN_INPUT_PULLUP, 0) /* (AC5) I2C0_SCL */
+			J721E_IOPAD(0x224, PIN_INPUT_PULLUP, 0) /* (AA5) I2C0_SDA */
+		>;
+	};
 };
 
 &wkup_uart0 {
@@ -225,4 +232,24 @@
 	ti,vbus-divider;
 };
 
+&main_i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_i2c0_pins_default>;
+	clock-frequency = <400000>;
+
+	exp1: gpio@20 {
+		compatible = "ti,tca6416";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	exp2: gpio@22 {
+		compatible = "ti,tca6424";
+		reg = <0x22>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+};
+
 #include "k3-j721e-common-proc-board-u-boot.dtsi"