GPIO hog via device tree overlay

[inx-onlya]

I would like to set a GPIO to output-high during the boot. In this case, the GPIO is PG0 whose number is 192.

The device tree overlay is

/dts-v1/;
/plugin/;

/ {
	compatible = "allwinner,sun50i-a64";

	fragment@0 {
		target = <&pio>;
		__overlay__ {
			gpio_out_override_hog {
				gpio-hog;
				gpios = <192 0>; /* PG0 */
				output-high;
				line-name = "PG0-gpio-hog";
			};
		};
	};
};

 

However, after the application and reboot, I do not see any init information in "/sys/kernel/gpio" about GPIO 192. There is no "/sys/class/gpio/gpio192" folder existed after boot either.

Is there anything wrong in the overlay file?