// SPDX-License-Identifier: GPL-2.0
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/gfp.h>

#include <linux/gpio/consumer.h>
#include <linux/gpio/driver.h>

#include <linux/gpio.h>

#include "gpiolib.h"

/*
 * **DEPRECATED** This function is deprecated and must not be used in new code.
 */
void gpio_free(unsigned gpio)
{
        gpiod_free(gpio_to_desc(gpio));
}
EXPORT_SYMBOL_GPL(gpio_free);

/**
 * gpio_request_one - request a single GPIO with initial configuration
 * @gpio:       the GPIO number
 * @flags:      GPIO configuration as specified by GPIOF_*
 * @label:      a literal description string of this GPIO
 *
 * **DEPRECATED** This function is deprecated and must not be used in new code.
 *
 * Returns:
 * 0 on success, or negative errno on failure.
 */
int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
{
        int err;

        err = gpio_request(gpio, label);
        if (err)
                return err;

        if (flags & GPIOF_IN)
                err = gpio_direction_input(gpio);
        else
                err = gpio_direction_output(gpio, !!(flags & GPIOF_OUT_INIT_HIGH));

        if (err)
                gpio_free(gpio);

        return err;
}
EXPORT_SYMBOL_GPL(gpio_request_one);

/*
 * **DEPRECATED** This function is deprecated and must not be used in new code.
 */
int gpio_request(unsigned gpio, const char *label)
{
        struct gpio_desc *desc;

        /* Compatibility: assume unavailable "valid" GPIOs will appear later */
        desc = gpio_to_desc(gpio);
        if (!desc)
                return -EPROBE_DEFER;

        return gpiod_request(desc, label);
}
EXPORT_SYMBOL_GPL(gpio_request);

static void devm_gpio_release(void *gpio)
{
        gpio_free((unsigned)(unsigned long)gpio);
}

/**
 * devm_gpio_request_one - request a single GPIO with initial setup
 * @dev: device to request for
 * @gpio: the GPIO number
 * @flags: GPIO configuration as specified by GPIOF_*
 * @label: a literal description string of this GPIO
 *
 * **DEPRECATED** This function is deprecated and must not be used in new code.
 *
 * Returns:
 * 0 on success, or negative errno on failure.
 */
int devm_gpio_request_one(struct device *dev, unsigned gpio,
                          unsigned long flags, const char *label)
{
        int rc;

        rc = gpio_request(gpio, label);
        if (rc)
                return rc;

        if (flags & GPIOF_IN)
                rc = gpio_direction_input(gpio);
        else
                rc = gpio_direction_output(gpio, !!(flags & GPIOF_OUT_INIT_HIGH));

        if (rc) {
                gpio_free(gpio);
                return rc;
        }

        return devm_add_action_or_reset(dev, devm_gpio_release, (void *)(unsigned long)gpio);
}
EXPORT_SYMBOL_GPL(devm_gpio_request_one);