1 #include <linux/gpio/consumer.h>
2 #include <linux/gpio/driver.h>
4 #include <linux/gpio.h>
8 void gpio_free(unsigned gpio)
10 gpiod_free(gpio_to_desc(gpio));
12 EXPORT_SYMBOL_GPL(gpio_free);
15 * gpio_request_one - request a single GPIO with initial configuration
16 * @gpio: the GPIO number
17 * @flags: GPIO configuration as specified by GPIOF_*
18 * @label: a literal description string of this GPIO
20 int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
22 struct gpio_desc *desc;
25 desc = gpio_to_desc(gpio);
27 /* Compatibility: assume unavailable "valid" GPIOs will appear later */
28 if (!desc && gpio_is_valid(gpio))
31 err = gpiod_request(desc, label);
35 if (flags & GPIOF_OPEN_DRAIN)
36 set_bit(FLAG_OPEN_DRAIN, &desc->flags);
38 if (flags & GPIOF_OPEN_SOURCE)
39 set_bit(FLAG_OPEN_SOURCE, &desc->flags);
41 if (flags & GPIOF_ACTIVE_LOW)
42 set_bit(FLAG_ACTIVE_LOW, &desc->flags);
44 if (flags & GPIOF_DIR_IN)
45 err = gpiod_direction_input(desc);
47 err = gpiod_direction_output_raw(desc,
48 (flags & GPIOF_INIT_HIGH) ? 1 : 0);
53 if (flags & GPIOF_EXPORT) {
54 err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
65 EXPORT_SYMBOL_GPL(gpio_request_one);
67 int gpio_request(unsigned gpio, const char *label)
69 struct gpio_desc *desc = gpio_to_desc(gpio);
71 /* Compatibility: assume unavailable "valid" GPIOs will appear later */
72 if (!desc && gpio_is_valid(gpio))
75 return gpiod_request(desc, label);
77 EXPORT_SYMBOL_GPL(gpio_request);
80 * gpio_request_array - request multiple GPIOs in a single call
81 * @array: array of the 'struct gpio'
82 * @num: how many GPIOs in the array
84 int gpio_request_array(const struct gpio *array, size_t num)
88 for (i = 0; i < num; i++, array++) {
89 err = gpio_request_one(array->gpio, array->flags, array->label);
97 gpio_free((--array)->gpio);
100 EXPORT_SYMBOL_GPL(gpio_request_array);
103 * gpio_free_array - release multiple GPIOs in a single call
104 * @array: array of the 'struct gpio'
105 * @num: how many GPIOs in the array
107 void gpio_free_array(const struct gpio *array, size_t num)
110 gpio_free((array++)->gpio);
112 EXPORT_SYMBOL_GPL(gpio_free_array);