linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

/*

 * devres.c - managed gpio resources

 * This file is based on kernel/irq/devres.c

 *

 * Copyright (c) 2011 John Crispin <john@phrozen.org>

 */

​

#include <linux/module.h>

#include <linux/err.h>

#include <linux/gpio.h>

#include <linux/gpio/consumer.h>

#include <linux/device.h>

#include <linux/gfp.h>

​

#include "gpiolib.h"

​

static void devm_gpiod_release(struct device *dev, void *res)

{

    struct gpio_desc **desc = res;

​

    gpiod_put(*desc);

}

​

static int devm_gpiod_match(struct device *dev, void *res, void *data)

{

    struct gpio_desc **this = res, **gpio = data;

​

    return *this == *gpio;

}

​

static void devm_gpiod_release_array(struct device *dev, void *res)

{

    struct gpio_descs **descs = res;

​

    gpiod_put_array(*descs);

}

​

static int devm_gpiod_match_array(struct device *dev, void *res, void *data)

{

    struct gpio_descs **this = res, **gpios = data;

​

    return *this == *gpios;

}

​

/**

 * devm_gpiod_get - Resource-managed gpiod_get()

 * @dev:    GPIO consumer

 * @con_id: function within the GPIO consumer

 * @flags:  optional GPIO initialization flags

 *

 * Managed gpiod_get(). GPIO descriptors returned from this function are

 * automatically disposed on driver detach. See gpiod_get() for detailed

 * information about behavior and return values.

 */

struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,

                          const char *con_id,

                          enum gpiod_flags flags)

{

    return devm_gpiod_get_index(dev, con_id, 0, flags);

}

EXPORT_SYMBOL(devm_gpiod_get);

​

/**

 * devm_gpiod_get_optional - Resource-managed gpiod_get_optional()

 * @dev: GPIO consumer

 * @con_id: function within the GPIO consumer

 * @flags: optional GPIO initialization flags

 *

 * Managed gpiod_get_optional(). GPIO descriptors returned from this function

 * are automatically disposed on driver detach. See gpiod_get_optional() for

 * detailed information about behavior and return values.

 */

struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,

                               const char *con_id,

                               enum gpiod_flags flags)

{

    return devm_gpiod_get_index_optional(dev, con_id, 0, flags);

}

EXPORT_SYMBOL(devm_gpiod_get_optional);

​

/**

 * devm_gpiod_get_index - Resource-managed gpiod_get_index()

 * @dev:    GPIO consumer

 * @con_id: function within the GPIO consumer

 * @idx:    index of the GPIO to obtain in the consumer

 * @flags:  optional GPIO initialization flags

 *

 * Managed gpiod_get_index(). GPIO descriptors returned from this function are

 * automatically disposed on driver detach. See gpiod_get_index() for detailed

 * information about behavior and return values.

 */