1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/gpio/consumer.h>
3 #include <linux/gpio/driver.h>
5 #include <linux/gpio.h>
9 void gpio_free(unsigned gpio)
11 gpiod_free(gpio_to_desc(gpio));
13 EXPORT_SYMBOL_GPL(gpio_free);
16 * gpio_request_one - request a single GPIO with initial configuration
17 * @gpio: the GPIO number
18 * @flags: GPIO configuration as specified by GPIOF_*
19 * @label: a literal description string of this GPIO
21 int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
23 struct gpio_desc *desc;
26 desc = gpio_to_desc(gpio);
28 /* Compatibility: assume unavailable "valid" GPIOs will appear later */
29 if (!desc && gpio_is_valid(gpio))
32 err = gpiod_request(desc, label);
36 if (flags & GPIOF_OPEN_DRAIN)
37 set_bit(FLAG_OPEN_DRAIN, &desc->flags);
39 if (flags & GPIOF_OPEN_SOURCE)
40 set_bit(FLAG_OPEN_SOURCE, &desc->flags);
42 if (flags & GPIOF_ACTIVE_LOW)
43 set_bit(FLAG_ACTIVE_LOW, &desc->flags);
45 if (flags & GPIOF_DIR_IN)
46 err = gpiod_direction_input(desc);
48 err = gpiod_direction_output_raw(desc,
49 (flags & GPIOF_INIT_HIGH) ? 1 : 0);
54 if (flags & GPIOF_EXPORT) {
55 err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
66 EXPORT_SYMBOL_GPL(gpio_request_one);
68 int gpio_request(unsigned gpio, const char *label)
70 struct gpio_desc *desc = gpio_to_desc(gpio);
72 /* Compatibility: assume unavailable "valid" GPIOs will appear later */
73 if (!desc && gpio_is_valid(gpio))
76 return gpiod_request(desc, label);
78 EXPORT_SYMBOL_GPL(gpio_request);
81 * gpio_request_array - request multiple GPIOs in a single call
82 * @array: array of the 'struct gpio'
83 * @num: how many GPIOs in the array
85 int gpio_request_array(const struct gpio *array, size_t num)
89 for (i = 0; i < num; i++, array++) {
90 err = gpio_request_one(array->gpio, array->flags, array->label);
98 gpio_free((--array)->gpio);
101 EXPORT_SYMBOL_GPL(gpio_request_array);
104 * gpio_free_array - release multiple GPIOs in a single call
105 * @array: array of the 'struct gpio'
106 * @num: how many GPIOs in the array
108 void gpio_free_array(const struct gpio *array, size_t num)
111 gpio_free((array++)->gpio);
113 EXPORT_SYMBOL_GPL(gpio_free_array);