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7560fa60 DB |
1 | #ifndef __LINUX_GPIO_H |
2 | #define __LINUX_GPIO_H | |
3 | ||
4 | /* see Documentation/gpio.txt */ | |
5 | ||
c001fb72 RD |
6 | /* make these flag values available regardless of GPIO kconfig options */ |
7 | #define GPIOF_DIR_OUT (0 << 0) | |
8 | #define GPIOF_DIR_IN (1 << 0) | |
9 | ||
10 | #define GPIOF_INIT_LOW (0 << 1) | |
11 | #define GPIOF_INIT_HIGH (1 << 1) | |
12 | ||
13 | #define GPIOF_IN (GPIOF_DIR_IN) | |
14 | #define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW) | |
15 | #define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH) | |
16 | ||
aca5ce14 LD |
17 | /* Gpio pin is open drain */ |
18 | #define GPIOF_OPEN_DRAIN (1 << 2) | |
19 | ||
feb83699 MB |
20 | /** |
21 | * struct gpio - a structure describing a GPIO with configuration | |
22 | * @gpio: the GPIO number | |
23 | * @flags: GPIO configuration as specified by GPIOF_* | |
24 | * @label: a literal description string of this GPIO | |
25 | */ | |
26 | struct gpio { | |
27 | unsigned gpio; | |
28 | unsigned long flags; | |
29 | const char *label; | |
30 | }; | |
31 | ||
7560fa60 DB |
32 | #ifdef CONFIG_GENERIC_GPIO |
33 | #include <asm/gpio.h> | |
34 | ||
35 | #else | |
36 | ||
3d599d1c | 37 | #include <linux/kernel.h> |
6ea0205b DB |
38 | #include <linux/types.h> |
39 | #include <linux/errno.h> | |
40 | ||
a4177ee7 | 41 | struct device; |
4e4438b8 | 42 | struct gpio_chip; |
a4177ee7 | 43 | |
3474cb3c | 44 | static inline bool gpio_is_valid(int number) |
7560fa60 | 45 | { |
3474cb3c | 46 | return false; |
7560fa60 DB |
47 | } |
48 | ||
d8a3515e | 49 | static inline int gpio_request(unsigned gpio, const char *label) |
7560fa60 DB |
50 | { |
51 | return -ENOSYS; | |
52 | } | |
53 | ||
323b7fe8 | 54 | static inline int gpio_request_one(unsigned gpio, |
5f829e40 WS |
55 | unsigned long flags, const char *label) |
56 | { | |
57 | return -ENOSYS; | |
58 | } | |
59 | ||
7c295975 | 60 | static inline int gpio_request_array(const struct gpio *array, size_t num) |
5f829e40 WS |
61 | { |
62 | return -ENOSYS; | |
63 | } | |
64 | ||
7560fa60 DB |
65 | static inline void gpio_free(unsigned gpio) |
66 | { | |
3d599d1c UKK |
67 | might_sleep(); |
68 | ||
7560fa60 DB |
69 | /* GPIO can never have been requested */ |
70 | WARN_ON(1); | |
71 | } | |
72 | ||
7c295975 | 73 | static inline void gpio_free_array(const struct gpio *array, size_t num) |
5f829e40 WS |
74 | { |
75 | might_sleep(); | |
76 | ||
77 | /* GPIO can never have been requested */ | |
78 | WARN_ON(1); | |
79 | } | |
80 | ||
d8a3515e | 81 | static inline int gpio_direction_input(unsigned gpio) |
7560fa60 DB |
82 | { |
83 | return -ENOSYS; | |
84 | } | |
85 | ||
d8a3515e | 86 | static inline int gpio_direction_output(unsigned gpio, int value) |
7560fa60 DB |
87 | { |
88 | return -ENOSYS; | |
89 | } | |
90 | ||
c4b5be98 FB |
91 | static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
92 | { | |
93 | return -ENOSYS; | |
94 | } | |
95 | ||
7560fa60 DB |
96 | static inline int gpio_get_value(unsigned gpio) |
97 | { | |
98 | /* GPIO can never have been requested or set as {in,out}put */ | |
99 | WARN_ON(1); | |
100 | return 0; | |
101 | } | |
102 | ||
103 | static inline void gpio_set_value(unsigned gpio, int value) | |
104 | { | |
105 | /* GPIO can never have been requested or set as output */ | |
106 | WARN_ON(1); | |
107 | } | |
108 | ||
109 | static inline int gpio_cansleep(unsigned gpio) | |
110 | { | |
111 | /* GPIO can never have been requested or set as {in,out}put */ | |
112 | WARN_ON(1); | |
113 | return 0; | |
114 | } | |
115 | ||
116 | static inline int gpio_get_value_cansleep(unsigned gpio) | |
117 | { | |
118 | /* GPIO can never have been requested or set as {in,out}put */ | |
119 | WARN_ON(1); | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static inline void gpio_set_value_cansleep(unsigned gpio, int value) | |
124 | { | |
125 | /* GPIO can never have been requested or set as output */ | |
126 | WARN_ON(1); | |
127 | } | |
128 | ||
d8f388d8 DB |
129 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
130 | { | |
131 | /* GPIO can never have been requested or set as {in,out}put */ | |
132 | WARN_ON(1); | |
133 | return -EINVAL; | |
134 | } | |
135 | ||
a4177ee7 JN |
136 | static inline int gpio_export_link(struct device *dev, const char *name, |
137 | unsigned gpio) | |
138 | { | |
139 | /* GPIO can never have been exported */ | |
140 | WARN_ON(1); | |
141 | return -EINVAL; | |
142 | } | |
143 | ||
07697461 JN |
144 | static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
145 | { | |
146 | /* GPIO can never have been requested */ | |
147 | WARN_ON(1); | |
148 | return -EINVAL; | |
149 | } | |
a4177ee7 | 150 | |
d8f388d8 DB |
151 | static inline void gpio_unexport(unsigned gpio) |
152 | { | |
153 | /* GPIO can never have been exported */ | |
154 | WARN_ON(1); | |
155 | } | |
156 | ||
7560fa60 DB |
157 | static inline int gpio_to_irq(unsigned gpio) |
158 | { | |
159 | /* GPIO can never have been requested or set as input */ | |
160 | WARN_ON(1); | |
161 | return -EINVAL; | |
162 | } | |
163 | ||
164 | static inline int irq_to_gpio(unsigned irq) | |
165 | { | |
166 | /* irq can never have been returned from gpio_to_irq() */ | |
167 | WARN_ON(1); | |
168 | return -EINVAL; | |
169 | } | |
170 | ||
171 | #endif | |
172 | ||
173 | #endif /* __LINUX_GPIO_H */ |