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 */ 12 void gpio_free(unsigned gpio) 13 { 14 gpiod_free(gpio_to_desc(gpio)); 15 } 16 EXPORT_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 */ 26 int 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 } 59 EXPORT_SYMBOL_GPL(gpio_request_one); 60 61 /* 62 * **DEPRECATED** This function is deprecated and must not be used in new code. 63 */ 64 int 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 } 74 EXPORT_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 */ 83 int 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 94 err_free: 95 while (i--) 96 gpio_free((--array)->gpio); 97 return err; 98 } 99 EXPORT_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 */ 108 void gpio_free_array(const struct gpio *array, size_t num) 109 { 110 while (num--) 111 gpio_free((array++)->gpio); 112 } 113 EXPORT_SYMBOL_GPL(gpio_free_array); 114