1// SPDX-License-Identifier: GPL-2.0
  2#include <linux/gpio/consumer.h>
  3#include <linux/gpio/driver.h>
  4
  5#include <linux/gpio.h>
  6
  7#include "gpiolib.h"
  8
  9/*
 10 * **DEPRECATED** This function is deprecated and must not be used in new code.
 11 */
 12void gpio_free(unsigned gpio)
 13{
 14	gpiod_free(gpio_to_desc(gpio));
 15}
 16EXPORT_SYMBOL_GPL(gpio_free);
 17
 18/**
 19 * gpio_request_one - request a single GPIO with initial configuration
 20 * @gpio:	the GPIO number
 21 * @flags:	GPIO configuration as specified by GPIOF_*
 22 * @label:	a literal description string of this GPIO
 23 *
 24 * **DEPRECATED** This function is deprecated and must not be used in new code.
 25 */
 26int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
 27{
 28	struct gpio_desc *desc;
 29	int err;
 30
 31	desc = gpio_to_desc(gpio);
 32
 33	/* Compatibility: assume unavailable "valid" GPIOs will appear later */
 34	if (!desc && gpio_is_valid(gpio))
 35		return -EPROBE_DEFER;
 36
 37	err = gpiod_request(desc, label);
 38	if (err)
 39		return err;
 40
 41	if (flags & GPIOF_ACTIVE_LOW)
 42		set_bit(FLAG_ACTIVE_LOW, &desc->flags);
 43
 44	if (flags & GPIOF_DIR_IN)
 45		err = gpiod_direction_input(desc);
 46	else
 47		err = gpiod_direction_output_raw(desc,
 48				(flags & GPIOF_INIT_HIGH) ? 1 : 0);
 49
 50	if (err)
 51		goto free_gpio;
 52
 53	return 0;
 54
 55 free_gpio:
 56	gpiod_free(desc);
 57	return err;
 58}
 59EXPORT_SYMBOL_GPL(gpio_request_one);
 60
 61/*
 62 * **DEPRECATED** This function is deprecated and must not be used in new code.
 63 */
 64int gpio_request(unsigned gpio, const char *label)
 65{
 66	struct gpio_desc *desc = gpio_to_desc(gpio);
 67
 68	/* Compatibility: assume unavailable "valid" GPIOs will appear later */
 69	if (!desc && gpio_is_valid(gpio))
 70		return -EPROBE_DEFER;
 71
 72	return gpiod_request(desc, label);
 73}
 74EXPORT_SYMBOL_GPL(gpio_request);
 75
 76/**
 77 * gpio_request_array - request multiple GPIOs in a single call
 78 * @array:	array of the 'struct gpio'
 79 * @num:	how many GPIOs in the array
 80 *
 81 * **DEPRECATED** This function is deprecated and must not be used in new code.
 82 */
 83int gpio_request_array(const struct gpio *array, size_t num)
 84{
 85	int i, err;
 86
 87	for (i = 0; i < num; i++, array++) {
 88		err = gpio_request_one(array->gpio, array->flags, array->label);
 89		if (err)
 90			goto err_free;
 91	}
 92	return 0;
 93
 94err_free:
 95	while (i--)
 96		gpio_free((--array)->gpio);
 97	return err;
 98}
 99EXPORT_SYMBOL_GPL(gpio_request_array);
100
101/**
102 * gpio_free_array - release multiple GPIOs in a single call
103 * @array:	array of the 'struct gpio'
104 * @num:	how many GPIOs in the array
105 *
106 * **DEPRECATED** This function is deprecated and must not be used in new code.
107 */
108void gpio_free_array(const struct gpio *array, size_t num)
109{
110	while (num--)
111		gpio_free((array++)->gpio);
112}
113EXPORT_SYMBOL_GPL(gpio_free_array);