diff --git a/boards/ti/lp_mspm0g3507/lp_mspm0g3507.dts b/boards/ti/lp_mspm0g3507/lp_mspm0g3507.dts
index ac65ba9ca3e23..26ab2ef13e94f 100644
--- a/boards/ti/lp_mspm0g3507/lp_mspm0g3507.dts
+++ b/boards/ti/lp_mspm0g3507/lp_mspm0g3507.dts
@@ -20,6 +20,7 @@
 	aliases {
 		led0 = &led0;
 		pwm-led0 = &pwm_led0;
+		sw0 = &button0;
 	};
 
 	chosen {
@@ -46,6 +47,16 @@
 			pwms = <&pwma0 0 PWM_MSEC(100) PWM_POLARITY_NORMAL>;
 		};
 	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		button0: button_0 {
+			gpios = <&gpiob 21 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "Side button";
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
 };
 
 &cpu0 {