examples/lock-app/telink/boards/tlsr9528a_retention.overlay

/ {
	keys {
		compatible = "gpio-keys";
		key_5: button_5 {
			gpios = <&gpiob 6 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
		};
		key_6: button_6 {
			gpios = <&gpiob 7 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
		};
	};
};

&gpiob {
	interrupts = <39 1>;
	status = "okay";
};