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(desc: 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(number: 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, addr: &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 | value: (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(number: 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 | |