boards/xtensa/heltec_wireless_stick_lite_v3/board_init.c

/*
 * Copyright (c) 2021 Instituto de Pesquisas Eldorado (eldorado.org.br)
 * Copyright (c) 2023 The Zephyr Project Contributors
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/init.h>

#define VEXT_PIN  DT_GPIO_PIN(DT_NODELABEL(vext), gpios)

static int board_heltec_wireless_stick_lite_v3_init(void)
{
	const struct device *gpio;

	gpio = DEVICE_DT_GET(DT_NODELABEL(gpio0));
	if (!device_is_ready(gpio)) {
		return -ENODEV;
	}

	/* turns external VCC on  */
	gpio_pin_configure(gpio, VEXT_PIN, GPIO_OUTPUT);
	gpio_pin_set_raw(gpio, VEXT_PIN, 0);

	return 0;
}

SYS_INIT(board_heltec_wireless_stick_lite_v3_init, PRE_KERNEL_2, CONFIG_GPIO_INIT_PRIORITY);