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7560fa60 DB |
1 | #ifndef __LINUX_GPIO_H |
2 | #define __LINUX_GPIO_H | |
3 | ||
7563bbf8 MB |
4 | #include <linux/errno.h> |
5 | ||
7560fa60 DB |
6 | /* see Documentation/gpio.txt */ |
7 | ||
c001fb72 RD |
8 | /* make these flag values available regardless of GPIO kconfig options */ |
9 | #define GPIOF_DIR_OUT (0 << 0) | |
10 | #define GPIOF_DIR_IN (1 << 0) | |
11 | ||
12 | #define GPIOF_INIT_LOW (0 << 1) | |
13 | #define GPIOF_INIT_HIGH (1 << 1) | |
14 | ||
15 | #define GPIOF_IN (GPIOF_DIR_IN) | |
16 | #define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW) | |
17 | #define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH) | |
18 | ||
79a9becd AC |
19 | /* Gpio pin is active-low */ |
20 | #define GPIOF_ACTIVE_LOW (1 << 2) | |
21 | ||
aca5ce14 | 22 | /* Gpio pin is open drain */ |
79a9becd | 23 | #define GPIOF_OPEN_DRAIN (1 << 3) |
aca5ce14 | 24 | |
25553ff0 | 25 | /* Gpio pin is open source */ |
79a9becd | 26 | #define GPIOF_OPEN_SOURCE (1 << 4) |
25553ff0 | 27 | |
79a9becd AC |
28 | #define GPIOF_EXPORT (1 << 5) |
29 | #define GPIOF_EXPORT_CHANGEABLE (1 << 6) | |
fc3a1f04 WS |
30 | #define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT) |
31 | #define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE) | |
32 | ||
feb83699 MB |
33 | /** |
34 | * struct gpio - a structure describing a GPIO with configuration | |
35 | * @gpio: the GPIO number | |
36 | * @flags: GPIO configuration as specified by GPIOF_* | |
37 | * @label: a literal description string of this GPIO | |
38 | */ | |
39 | struct gpio { | |
40 | unsigned gpio; | |
41 | unsigned long flags; | |
42 | const char *label; | |
43 | }; | |
44 | ||
76ec9d18 | 45 | #ifdef CONFIG_GPIOLIB |
7563bbf8 MB |
46 | |
47 | #ifdef CONFIG_ARCH_HAVE_CUSTOM_GPIO_H | |
7560fa60 | 48 | #include <asm/gpio.h> |
7563bbf8 MB |
49 | #else |
50 | ||
51 | #include <asm-generic/gpio.h> | |
52 | ||
53 | static inline int gpio_get_value(unsigned int gpio) | |
54 | { | |
55 | return __gpio_get_value(gpio); | |
56 | } | |
57 | ||
58 | static inline void gpio_set_value(unsigned int gpio, int value) | |
59 | { | |
60 | __gpio_set_value(gpio, value); | |
61 | } | |
62 | ||
63 | static inline int gpio_cansleep(unsigned int gpio) | |
64 | { | |
65 | return __gpio_cansleep(gpio); | |
66 | } | |
67 | ||
68 | static inline int gpio_to_irq(unsigned int gpio) | |
69 | { | |
70 | return __gpio_to_irq(gpio); | |
71 | } | |
72 | ||
73 | static inline int irq_to_gpio(unsigned int irq) | |
74 | { | |
75 | return -EINVAL; | |
76 | } | |
77 | ||
165adc9c | 78 | #endif /* ! CONFIG_ARCH_HAVE_CUSTOM_GPIO_H */ |
7560fa60 | 79 | |
76ec9d18 | 80 | #else /* ! CONFIG_GPIOLIB */ |
7560fa60 | 81 | |
3d599d1c | 82 | #include <linux/kernel.h> |
6ea0205b DB |
83 | #include <linux/types.h> |
84 | #include <linux/errno.h> | |
187f1882 | 85 | #include <linux/bug.h> |
6ea0205b | 86 | |
a4177ee7 | 87 | struct device; |
4e4438b8 | 88 | struct gpio_chip; |
a4177ee7 | 89 | |
3474cb3c | 90 | static inline bool gpio_is_valid(int number) |
7560fa60 | 91 | { |
3474cb3c | 92 | return false; |
7560fa60 DB |
93 | } |
94 | ||
d8a3515e | 95 | static inline int gpio_request(unsigned gpio, const char *label) |
7560fa60 DB |
96 | { |
97 | return -ENOSYS; | |
98 | } | |
99 | ||
323b7fe8 | 100 | static inline int gpio_request_one(unsigned gpio, |
5f829e40 WS |
101 | unsigned long flags, const char *label) |
102 | { | |
103 | return -ENOSYS; | |
104 | } | |
105 | ||
7c295975 | 106 | static inline int gpio_request_array(const struct gpio *array, size_t num) |
5f829e40 WS |
107 | { |
108 | return -ENOSYS; | |
109 | } | |
110 | ||
7560fa60 DB |
111 | static inline void gpio_free(unsigned gpio) |
112 | { | |
3d599d1c UKK |
113 | might_sleep(); |
114 | ||
7560fa60 | 115 | /* GPIO can never have been requested */ |
2c96922a MB |
116 | WARN_ON(1); |
117 | } | |
118 | ||
7c295975 | 119 | static inline void gpio_free_array(const struct gpio *array, size_t num) |
5f829e40 WS |
120 | { |
121 | might_sleep(); | |
122 | ||
123 | /* GPIO can never have been requested */ | |
124 | WARN_ON(1); | |
125 | } | |
126 | ||
d8a3515e | 127 | static inline int gpio_direction_input(unsigned gpio) |
7560fa60 DB |
128 | { |
129 | return -ENOSYS; | |
130 | } | |
131 | ||
d8a3515e | 132 | static inline int gpio_direction_output(unsigned gpio, int value) |
7560fa60 DB |
133 | { |
134 | return -ENOSYS; | |
135 | } | |
136 | ||
c4b5be98 FB |
137 | static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
138 | { | |
139 | return -ENOSYS; | |
140 | } | |
141 | ||
7560fa60 DB |
142 | static inline int gpio_get_value(unsigned gpio) |
143 | { | |
144 | /* GPIO can never have been requested or set as {in,out}put */ | |
145 | WARN_ON(1); | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static inline void gpio_set_value(unsigned gpio, int value) | |
150 | { | |
151 | /* GPIO can never have been requested or set as output */ | |
152 | WARN_ON(1); | |
153 | } | |
154 | ||
155 | static inline int gpio_cansleep(unsigned gpio) | |
156 | { | |
157 | /* GPIO can never have been requested or set as {in,out}put */ | |
158 | WARN_ON(1); | |
159 | return 0; | |
160 | } | |
161 | ||
162 | static inline int gpio_get_value_cansleep(unsigned gpio) | |
163 | { | |
164 | /* GPIO can never have been requested or set as {in,out}put */ | |
165 | WARN_ON(1); | |
166 | return 0; | |
167 | } | |
168 | ||
169 | static inline void gpio_set_value_cansleep(unsigned gpio, int value) | |
170 | { | |
171 | /* GPIO can never have been requested or set as output */ | |
172 | WARN_ON(1); | |
173 | } | |
174 | ||
d8f388d8 DB |
175 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
176 | { | |
177 | /* GPIO can never have been requested or set as {in,out}put */ | |
178 | WARN_ON(1); | |
179 | return -EINVAL; | |
180 | } | |
181 | ||
a4177ee7 JN |
182 | static inline int gpio_export_link(struct device *dev, const char *name, |
183 | unsigned gpio) | |
184 | { | |
185 | /* GPIO can never have been exported */ | |
186 | WARN_ON(1); | |
187 | return -EINVAL; | |
188 | } | |
189 | ||
07697461 JN |
190 | static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
191 | { | |
192 | /* GPIO can never have been requested */ | |
193 | WARN_ON(1); | |
194 | return -EINVAL; | |
195 | } | |
a4177ee7 | 196 | |
d8f388d8 DB |
197 | static inline void gpio_unexport(unsigned gpio) |
198 | { | |
199 | /* GPIO can never have been exported */ | |
200 | WARN_ON(1); | |
201 | } | |
202 | ||
7560fa60 DB |
203 | static inline int gpio_to_irq(unsigned gpio) |
204 | { | |
205 | /* GPIO can never have been requested or set as input */ | |
206 | WARN_ON(1); | |
207 | return -EINVAL; | |
208 | } | |
209 | ||
d468bf9e LW |
210 | static inline int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset) |
211 | { | |
212 | WARN_ON(1); | |
213 | return -EINVAL; | |
214 | } | |
215 | ||
216 | static inline void gpio_unlock_as_irq(struct gpio_chip *chip, | |
217 | unsigned int offset) | |
218 | { | |
219 | WARN_ON(1); | |
220 | } | |
221 | ||
7560fa60 DB |
222 | static inline int irq_to_gpio(unsigned irq) |
223 | { | |
224 | /* irq can never have been returned from gpio_to_irq() */ | |
225 | WARN_ON(1); | |
226 | return -EINVAL; | |
227 | } | |
228 | ||
1e63d7b9 | 229 | static inline int |
165adc9c | 230 | gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name, |
316511c0 | 231 | unsigned int gpio_offset, unsigned int pin_offset, |
3f0f8670 | 232 | unsigned int npins) |
165adc9c | 233 | { |
50309a9c LW |
234 | WARN_ON(1); |
235 | return -EINVAL; | |
165adc9c LW |
236 | } |
237 | ||
238 | static inline void | |
239 | gpiochip_remove_pin_ranges(struct gpio_chip *chip) | |
240 | { | |
50309a9c | 241 | WARN_ON(1); |
165adc9c LW |
242 | } |
243 | ||
76ec9d18 | 244 | #endif /* ! CONFIG_GPIOLIB */ |
7560fa60 | 245 | |
6a89a314 SG |
246 | struct device; |
247 | ||
248 | /* bindings for managed devices that want to request gpios */ | |
249 | int devm_gpio_request(struct device *dev, unsigned gpio, const char *label); | |
250 | int devm_gpio_request_one(struct device *dev, unsigned gpio, | |
251 | unsigned long flags, const char *label); | |
252 | void devm_gpio_free(struct device *dev, unsigned int gpio); | |
253 | ||
7560fa60 | 254 | #endif /* __LINUX_GPIO_H */ |