Colibri VF61 don't resume after sleep

My devicetree now is as following:

gpio-keys {
	compatible = "gpio-keys";

	wakeup {
		label = "SODIMM pin 45 wakeup";
		gpios = <&gpio5 20 GPIO_ACTIVE_HIGH>;
		linux,code = <KEY_WAKEUP>;
		debounce-interval = <10>;
		wakeup-source;
	};
};

but it throws out a syntax error…

I cannot see where the error is