Commit | Line | Data |
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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 | ||
aca5ce14 LD |
19 | /* Gpio pin is open drain */ |
20 | #define GPIOF_OPEN_DRAIN (1 << 2) | |
21 | ||
25553ff0 LD |
22 | /* Gpio pin is open source */ |
23 | #define GPIOF_OPEN_SOURCE (1 << 3) | |
24 | ||
f567fde2 LD |
25 | #define GPIOF_EXPORT (1 << 4) |
26 | #define GPIOF_EXPORT_CHANGEABLE (1 << 5) | |
fc3a1f04 WS |
27 | #define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT) |
28 | #define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE) | |
29 | ||
feb83699 MB |
30 | /** |
31 | * struct gpio - a structure describing a GPIO with configuration | |
32 | * @gpio: the GPIO number | |
33 | * @flags: GPIO configuration as specified by GPIOF_* | |
34 | * @label: a literal description string of this GPIO | |
35 | */ | |
36 | struct gpio { | |
37 | unsigned gpio; | |
38 | unsigned long flags; | |
39 | const char *label; | |
40 | }; | |
41 | ||
7560fa60 | 42 | #ifdef CONFIG_GENERIC_GPIO |
7563bbf8 MB |
43 | |
44 | #ifdef CONFIG_ARCH_HAVE_CUSTOM_GPIO_H | |
7560fa60 | 45 | #include <asm/gpio.h> |
7563bbf8 MB |
46 | #else |
47 | ||
48 | #include <asm-generic/gpio.h> | |
49 | ||
50 | static inline int gpio_get_value(unsigned int gpio) | |
51 | { | |
52 | return __gpio_get_value(gpio); | |
53 | } | |
54 | ||
55 | static inline void gpio_set_value(unsigned int gpio, int value) | |
56 | { | |
57 | __gpio_set_value(gpio, value); | |
58 | } | |
59 | ||
60 | static inline int gpio_cansleep(unsigned int gpio) | |
61 | { | |
62 | return __gpio_cansleep(gpio); | |
63 | } | |
64 | ||
65 | static inline int gpio_to_irq(unsigned int gpio) | |
66 | { | |
67 | return __gpio_to_irq(gpio); | |
68 | } | |
69 | ||
70 | static inline int irq_to_gpio(unsigned int irq) | |
71 | { | |
72 | return -EINVAL; | |
73 | } | |
74 | ||
165adc9c | 75 | #endif /* ! CONFIG_ARCH_HAVE_CUSTOM_GPIO_H */ |
7560fa60 | 76 | |
165adc9c | 77 | #else /* ! CONFIG_GENERIC_GPIO */ |
7560fa60 | 78 | |
3d599d1c | 79 | #include <linux/kernel.h> |
6ea0205b DB |
80 | #include <linux/types.h> |
81 | #include <linux/errno.h> | |
187f1882 | 82 | #include <linux/bug.h> |
6ea0205b | 83 | |
a4177ee7 | 84 | struct device; |
4e4438b8 | 85 | struct gpio_chip; |
a4177ee7 | 86 | |
3474cb3c | 87 | static inline bool gpio_is_valid(int number) |
7560fa60 | 88 | { |
3474cb3c | 89 | return false; |
7560fa60 DB |
90 | } |
91 | ||
d8a3515e | 92 | static inline int gpio_request(unsigned gpio, const char *label) |
7560fa60 DB |
93 | { |
94 | return -ENOSYS; | |
95 | } | |
96 | ||
323b7fe8 | 97 | static inline int gpio_request_one(unsigned gpio, |
5f829e40 WS |
98 | unsigned long flags, const char *label) |
99 | { | |
100 | return -ENOSYS; | |
101 | } | |
102 | ||
7c295975 | 103 | static inline int gpio_request_array(const struct gpio *array, size_t num) |
5f829e40 WS |
104 | { |
105 | return -ENOSYS; | |
106 | } | |
107 | ||
7560fa60 DB |
108 | static inline void gpio_free(unsigned gpio) |
109 | { | |
3d599d1c UKK |
110 | might_sleep(); |
111 | ||
7560fa60 | 112 | /* GPIO can never have been requested */ |
2c96922a MB |
113 | WARN_ON(1); |
114 | } | |
115 | ||
7c295975 | 116 | static inline void gpio_free_array(const struct gpio *array, size_t num) |
5f829e40 WS |
117 | { |
118 | might_sleep(); | |
119 | ||
120 | /* GPIO can never have been requested */ | |
121 | WARN_ON(1); | |
122 | } | |
123 | ||
d8a3515e | 124 | static inline int gpio_direction_input(unsigned gpio) |
7560fa60 DB |
125 | { |
126 | return -ENOSYS; | |
127 | } | |
128 | ||
d8a3515e | 129 | static inline int gpio_direction_output(unsigned gpio, int value) |
7560fa60 DB |
130 | { |
131 | return -ENOSYS; | |
132 | } | |
133 | ||
c4b5be98 FB |
134 | static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
135 | { | |
136 | return -ENOSYS; | |
137 | } | |
138 | ||
7560fa60 DB |
139 | static inline int gpio_get_value(unsigned gpio) |
140 | { | |
141 | /* GPIO can never have been requested or set as {in,out}put */ | |
142 | WARN_ON(1); | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static inline void gpio_set_value(unsigned gpio, int value) | |
147 | { | |
148 | /* GPIO can never have been requested or set as output */ | |
149 | WARN_ON(1); | |
150 | } | |
151 | ||
152 | static inline int gpio_cansleep(unsigned gpio) | |
153 | { | |
154 | /* GPIO can never have been requested or set as {in,out}put */ | |
155 | WARN_ON(1); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static inline int gpio_get_value_cansleep(unsigned gpio) | |
160 | { | |
161 | /* GPIO can never have been requested or set as {in,out}put */ | |
162 | WARN_ON(1); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static inline void gpio_set_value_cansleep(unsigned gpio, int value) | |
167 | { | |
168 | /* GPIO can never have been requested or set as output */ | |
169 | WARN_ON(1); | |
170 | } | |
171 | ||
d8f388d8 DB |
172 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
173 | { | |
174 | /* GPIO can never have been requested or set as {in,out}put */ | |
175 | WARN_ON(1); | |
176 | return -EINVAL; | |
177 | } | |
178 | ||
a4177ee7 JN |
179 | static inline int gpio_export_link(struct device *dev, const char *name, |
180 | unsigned gpio) | |
181 | { | |
182 | /* GPIO can never have been exported */ | |
183 | WARN_ON(1); | |
184 | return -EINVAL; | |
185 | } | |
186 | ||
07697461 JN |
187 | static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
188 | { | |
189 | /* GPIO can never have been requested */ | |
190 | WARN_ON(1); | |
191 | return -EINVAL; | |
192 | } | |
a4177ee7 | 193 | |
d8f388d8 DB |
194 | static inline void gpio_unexport(unsigned gpio) |
195 | { | |
196 | /* GPIO can never have been exported */ | |
197 | WARN_ON(1); | |
198 | } | |
199 | ||
7560fa60 DB |
200 | static inline int gpio_to_irq(unsigned gpio) |
201 | { | |
202 | /* GPIO can never have been requested or set as input */ | |
203 | WARN_ON(1); | |
204 | return -EINVAL; | |
205 | } | |
206 | ||
207 | static inline int irq_to_gpio(unsigned irq) | |
208 | { | |
209 | /* irq can never have been returned from gpio_to_irq() */ | |
210 | WARN_ON(1); | |
211 | return -EINVAL; | |
212 | } | |
213 | ||
1e63d7b9 | 214 | static inline int |
165adc9c | 215 | gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name, |
316511c0 | 216 | unsigned int gpio_offset, unsigned int pin_offset, |
3f0f8670 | 217 | unsigned int npins) |
165adc9c | 218 | { |
50309a9c LW |
219 | WARN_ON(1); |
220 | return -EINVAL; | |
165adc9c LW |
221 | } |
222 | ||
223 | static inline void | |
224 | gpiochip_remove_pin_ranges(struct gpio_chip *chip) | |
225 | { | |
50309a9c | 226 | WARN_ON(1); |
165adc9c LW |
227 | } |
228 | ||
165adc9c | 229 | #endif /* ! CONFIG_GENERIC_GPIO */ |
7560fa60 | 230 | |
6a89a314 SG |
231 | struct device; |
232 | ||
233 | /* bindings for managed devices that want to request gpios */ | |
234 | int devm_gpio_request(struct device *dev, unsigned gpio, const char *label); | |
235 | int devm_gpio_request_one(struct device *dev, unsigned gpio, | |
236 | unsigned long flags, const char *label); | |
237 | void devm_gpio_free(struct device *dev, unsigned int gpio); | |
238 | ||
7560fa60 | 239 | #endif /* __LINUX_GPIO_H */ |