SK-AM62A-LP: Setting MCU GPIO wakeup source from deep sleep

Part Number: SK-AM62A-LP

Tool/software:

Hello,
I have followed this tutorial and this other tutorial to attempt to set MCU_GPIO0_16 as a wakeup source for my board.
I have modified "k3-am62x-sk-lpm-wkup-sources.dtso" on line 35 as suggested by the second tutorial. I noticed that one other thing that needed to be modified was "wake_mcugpio1_pins_default", which I did on line 63. See the file here:

// SPDX-License-Identifier: GPL-2.0
/**
 * AM62 family of devices can wakeup from Low Power Modes via
 * multiple wakeup sources. This overlay enables MAIN GPIO, MCU GPIO,
 * and MCU MCAN pins.
 *
 * Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/input/input.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>

#include "k3-pinctrl.h"

&{/} {
	gpio_key {
		compatible = "gpio-keys";
		autorepeat;
		pinctrl-names = "default";
		pinctrl-0 = <&main_gpio1_pins_default>;
		switch {
			label = "WKGPIO";
			linux,code = <KEY_WAKEUP>;
			interrupts-extended = <&main_gpio1 10 IRQ_TYPE_EDGE_RISING>,
				<&main_pmx0 0x1a0>;
			interrupt-names = "irq", "wakeup";
		};
	};

	mcu_gpio_key {
		compatible = "gpio-keys";
			autorepeat;
		pinctrl-names = "default";
		pinctrl-0 = <&wake_mcugpio1_pins_default>;
		interrupt-parent = <&mcu_gpio0>;
		interrupts = <16 IRQ_TYPE_EDGE_RISING>;
		switch {
			label = "MCUGPIO";
			linux,code = <143>;
			gpios = <&mcu_gpio0 16 GPIO_ACTIVE_LOW>;
			wakeup-source;
		};
	};
};

&main_pmx0 {
	main_gpio1_pins_default: main-gpio1-pins-default {
		pinctrl-single,pins = <
			AM62X_IOPAD(0x1a0, PIN_INPUT_PULLUP, 7) /* (E18) MCASP0_AXR0.EHRPWM1_B */
		>;
	};
};

&mcu_pmx0 {
	wake_mcugpio1_pins_default: wake-mcugpio1-pins-default {
		pinctrl-single,pins = <
			/* AM62X_MCU_IOPAD(0x0010, PIN_INPUT, 7) (D8) MCU_SPI0_D1.MCU_GPIO0_4 */
			AM62AX_MCU_IOPAD(0x0040, PIN_INPUT, 7) /* (B9) MCU_GPIO0_16 */
		>;
	};

	mcu_mcan0_tx_pins_default: mcu-mcan0-tx-pins-default {
		pinctrl-single,pins = <
			AM62X_IOPAD(0x034, PIN_OUTPUT, 0) /* (D6) MCU_MCAN0_TX */
		>;
	};

	mcu_mcan0_rx_pins_default: mcu-mcan0-rx-pins-default {
		pinctrl-single,pins = <
			AM62X_IOPAD(0x038, PIN_INPUT, 0) /* (B3) MCU_MCAN0_RX */
		>;
	};

	mcu_mcan0_rx_pins_wakeup: mcu-mcan0-rx-pins-wakeup {
		pinctrl-single,pins = <
			AM62X_IOPAD(0x038, PIN_INPUT | WKUP_EN, 0) /* (B3) MCU_MCAN0_RX */
		>;
	};

	mcu_mcan1_tx_pins_default: mcu-mcan1-tx-pins-default {
		pinctrl-single,pins = <
			AM62X_IOPAD(0x03c, PIN_OUTPUT, 0) /* (E5) MCU_MCAN1_TX */
		>;
	};

	mcu_mcan1_rx_pins_default: mcu-mcan1-rx-pins-default {
		pinctrl-single,pins = <
			AM62X_IOPAD(0x040, PIN_INPUT, 0) /* (D4) MCU_MCAN1_RX */
		>;
	};

	mcu_mcan1_rx_pins_wakeup: mcu-mcan1-rx-pins-wakeup {
		pinctrl-single,pins = <
			AM62X_IOPAD(0x040, PIN_INPUT | WKUP_EN, 0) /* (D4) MCU_MCAN1_RX */
		>;
	};

	mcu_uart0_pins_default: mcu-uart0-pins-default {
		pinctrl-single,pins = <
			AM62X_MCU_IOPAD(0x001c, PIN_INPUT, 0) /* MCU_UART0_CTSn */
			AM62X_MCU_IOPAD(0x0020, PIN_OUTPUT, 0) /* MCU_UART0_RTSn */
			AM62X_MCU_IOPAD(0x0018, PIN_OUTPUT, 0) /* MCU_UART0_TXD */
		>;
	};

	mcu_uart0_rxd_pins_default: mcu-uart0-rxd-pins-default {
		pinctrl-single,pins = <
			AM62X_MCU_IOPAD(0x0014, PIN_INPUT, 0) /* MCU_UART0_RXD */
		>;
	};

	mcu_uart0_rxd_pins_wakeup: mcu-uart0-rxd-pins-wakeup {
		pinctrl-single,pins = <
			AM62X_MCU_IOPAD(0x0014, PIN_INPUT | WKUP_EN, 0) /* MCU_UART0_RXD */
		>;
	};
};

&mcu_gpio0 {
	status = "okay";
};

&mcu_gpio_intr {
	status = "okay";
};

&mcu_mcan0 {
	pinctrl-names = "default", "wakeup";
	pinctrl-0 = <&mcu_mcan0_tx_pins_default>, <&mcu_mcan0_rx_pins_default>;
	pinctrl-1 = <&mcu_mcan0_tx_pins_default>, <&mcu_mcan0_rx_pins_wakeup>;
	status = "okay";
};

&mcu_mcan1 {
	pinctrl-names = "default", "wakeup";
	pinctrl-0 = <&mcu_mcan1_tx_pins_default>, <&mcu_mcan1_rx_pins_default>;
	pinctrl-1 = <&mcu_mcan1_tx_pins_default>, <&mcu_mcan1_rx_pins_wakeup>;
	status = "okay";
};

&mcu_uart0 {
	pinctrl-names = "default", "wakeup";
	pinctrl-0 = <&mcu_uart0_pins_default>, <&mcu_uart0_rxd_pins_default>;
	pinctrl-1 = <&mcu_uart0_pins_default>, <&mcu_uart0_rxd_pins_wakeup>;
	status = "ok";
};

I followed the instructions exactly to compile this file to a .dtbo and include it in my device tree, I also modified uEnv.txt as specified.

When I enter deep sleep or MCU only mode, tying the pin (Pin 11 on J8 MCU Header) to ground didn't wake the device up (as recommended by the tutorial). Tying the pin to 3.3V also didn't wake the device up.
I know that the device can be woken up from deep sleep, as the RTC is able to, as well as WKUP_UART.

What else should I do to wake the device up with an MCU GPIO that is accessible on the J8 MCU Header?