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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 | ||
25553ff0 LD |
20 | /* Gpio pin is open source */ |
21 | #define GPIOF_OPEN_SOURCE (1 << 3) | |
22 | ||
fc3a1f04 WS |
23 | #define GPIOF_EXPORT (1 << 2) |
24 | #define GPIOF_EXPORT_CHANGEABLE (1 << 3) | |
25 | #define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT) | |
26 | #define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE) | |
27 | ||
feb83699 MB |
28 | /** |
29 | * struct gpio - a structure describing a GPIO with configuration | |
30 | * @gpio: the GPIO number | |
31 | * @flags: GPIO configuration as specified by GPIOF_* | |
32 | * @label: a literal description string of this GPIO | |
33 | */ | |
34 | struct gpio { | |
35 | unsigned gpio; | |
36 | unsigned long flags; | |
37 | const char *label; | |
38 | }; | |
39 | ||
7560fa60 DB |
40 | #ifdef CONFIG_GENERIC_GPIO |
41 | #include <asm/gpio.h> | |
42 | ||
43 | #else | |
44 | ||
3d599d1c | 45 | #include <linux/kernel.h> |
6ea0205b DB |
46 | #include <linux/types.h> |
47 | #include <linux/errno.h> | |
187f1882 | 48 | #include <linux/bug.h> |
6ea0205b | 49 | |
a4177ee7 | 50 | struct device; |
4e4438b8 | 51 | struct gpio_chip; |
a4177ee7 | 52 | |
3474cb3c | 53 | static inline bool gpio_is_valid(int number) |
7560fa60 | 54 | { |
3474cb3c | 55 | return false; |
7560fa60 DB |
56 | } |
57 | ||
d8a3515e | 58 | static inline int gpio_request(unsigned gpio, const char *label) |
7560fa60 DB |
59 | { |
60 | return -ENOSYS; | |
61 | } | |
62 | ||
323b7fe8 | 63 | static inline int gpio_request_one(unsigned gpio, |
5f829e40 WS |
64 | unsigned long flags, const char *label) |
65 | { | |
66 | return -ENOSYS; | |
67 | } | |
68 | ||
7c295975 | 69 | static inline int gpio_request_array(const struct gpio *array, size_t num) |
5f829e40 WS |
70 | { |
71 | return -ENOSYS; | |
72 | } | |
73 | ||
7560fa60 DB |
74 | static inline void gpio_free(unsigned gpio) |
75 | { | |
3d599d1c UKK |
76 | might_sleep(); |
77 | ||
7560fa60 DB |
78 | /* GPIO can never have been requested */ |
79 | WARN_ON(1); | |
80 | } | |
81 | ||
7c295975 | 82 | static inline void gpio_free_array(const struct gpio *array, size_t num) |
5f829e40 WS |
83 | { |
84 | might_sleep(); | |
85 | ||
86 | /* GPIO can never have been requested */ | |
87 | WARN_ON(1); | |
88 | } | |
89 | ||
d8a3515e | 90 | static inline int gpio_direction_input(unsigned gpio) |
7560fa60 DB |
91 | { |
92 | return -ENOSYS; | |
93 | } | |
94 | ||
d8a3515e | 95 | static inline int gpio_direction_output(unsigned gpio, int value) |
7560fa60 DB |
96 | { |
97 | return -ENOSYS; | |
98 | } | |
99 | ||
c4b5be98 FB |
100 | static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
101 | { | |
102 | return -ENOSYS; | |
103 | } | |
104 | ||
7560fa60 DB |
105 | static inline int gpio_get_value(unsigned gpio) |
106 | { | |
107 | /* GPIO can never have been requested or set as {in,out}put */ | |
108 | WARN_ON(1); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | static inline void gpio_set_value(unsigned gpio, int value) | |
113 | { | |
114 | /* GPIO can never have been requested or set as output */ | |
115 | WARN_ON(1); | |
116 | } | |
117 | ||
118 | static inline int gpio_cansleep(unsigned gpio) | |
119 | { | |
120 | /* GPIO can never have been requested or set as {in,out}put */ | |
121 | WARN_ON(1); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static inline int gpio_get_value_cansleep(unsigned gpio) | |
126 | { | |
127 | /* GPIO can never have been requested or set as {in,out}put */ | |
128 | WARN_ON(1); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | static inline void gpio_set_value_cansleep(unsigned gpio, int value) | |
133 | { | |
134 | /* GPIO can never have been requested or set as output */ | |
135 | WARN_ON(1); | |
136 | } | |
137 | ||
d8f388d8 DB |
138 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
139 | { | |
140 | /* GPIO can never have been requested or set as {in,out}put */ | |
141 | WARN_ON(1); | |
142 | return -EINVAL; | |
143 | } | |
144 | ||
a4177ee7 JN |
145 | static inline int gpio_export_link(struct device *dev, const char *name, |
146 | unsigned gpio) | |
147 | { | |
148 | /* GPIO can never have been exported */ | |
149 | WARN_ON(1); | |
150 | return -EINVAL; | |
151 | } | |
152 | ||
07697461 JN |
153 | static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
154 | { | |
155 | /* GPIO can never have been requested */ | |
156 | WARN_ON(1); | |
157 | return -EINVAL; | |
158 | } | |
a4177ee7 | 159 | |
d8f388d8 DB |
160 | static inline void gpio_unexport(unsigned gpio) |
161 | { | |
162 | /* GPIO can never have been exported */ | |
163 | WARN_ON(1); | |
164 | } | |
165 | ||
7560fa60 DB |
166 | static inline int gpio_to_irq(unsigned gpio) |
167 | { | |
168 | /* GPIO can never have been requested or set as input */ | |
169 | WARN_ON(1); | |
170 | return -EINVAL; | |
171 | } | |
172 | ||
173 | static inline int irq_to_gpio(unsigned irq) | |
174 | { | |
175 | /* irq can never have been returned from gpio_to_irq() */ | |
176 | WARN_ON(1); | |
177 | return -EINVAL; | |
178 | } | |
179 | ||
180 | #endif | |
181 | ||
182 | #endif /* __LINUX_GPIO_H */ |