diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
index e2fc1288ed07..793d50344fad 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
@@ -148,6 +148,13 @@ J721S2_IOPAD(0x060, PIN_INPUT_PULLUP, 13) /* (AC27) MCASP2_AXR1.I2C3_SDA */
 		>;
 	};
 
+	main_i2c4_pins_default: main-i2c4-default-pins {
+		pinctrl-single,pins = <
+			J721S2_IOPAD(0x014, PIN_INPUT_PULLUP, 8) /* (AD25) I2C4_SCL */
+			J721S2_IOPAD(0x010, PIN_INPUT_PULLUP, 8) /* (AF28) I2C4_SDA */
+		>;
+	};
+
 	main_i2c5_pins_default: main-i2c5-default-pins {
 		pinctrl-single,pins = <
 			J721S2_IOPAD(0x01c, PIN_INPUT, 8) /* (Y24) MCAN15_TX.I2C5_SCL */
@@ -370,6 +377,23 @@ exp2: gpio@22 {
 	};
 };
 
+&main_i2c4 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_i2c4_pins_default>;
+	clock-frequency = <400000>;
+
+	exp4: gpio@20 {
+		compatible = "ti,tca6408";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "DP0_PWR_SW_EN", "DP1_PWR_SW_EN", "UB981_PDB",
+				  "UB981_GPIO0", "UB981_GPIO1", "UB981_GPIO2",
+				  "UB981_GPIO3", "PWR_SW_CNTL_DSI0#";
+	};
+};
+
 &main_i2c5 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&main_i2c5_pins_default>;