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12#ifndef __LINUX_GPIO_H
13#define __LINUX_GPIO_H
14
15#include <linux/errno.h>
16
17
18
19
20#define GPIOF_DIR_OUT (0 << 0)
21#define GPIOF_DIR_IN (1 << 0)
22
23#define GPIOF_INIT_LOW (0 << 1)
24#define GPIOF_INIT_HIGH (1 << 1)
25
26#define GPIOF_IN (GPIOF_DIR_IN)
27#define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW)
28#define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH)
29
30
31#define GPIOF_ACTIVE_LOW (1 << 2)
32
33
34#define GPIOF_OPEN_DRAIN (1 << 3)
35
36
37#define GPIOF_OPEN_SOURCE (1 << 4)
38
39#define GPIOF_EXPORT (1 << 5)
40#define GPIOF_EXPORT_CHANGEABLE (1 << 6)
41#define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT)
42#define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)
43
44
45
46
47
48
49
50struct gpio {
51 unsigned gpio;
52 unsigned long flags;
53 const char *label;
54};
55
56#ifdef CONFIG_GPIOLIB
57
58#ifdef CONFIG_ARCH_HAVE_CUSTOM_GPIO_H
59#include <asm/gpio.h>
60#else
61
62#include <asm-generic/gpio.h>
63
64static inline int gpio_get_value(unsigned int gpio)
65{
66 return __gpio_get_value(gpio);
67}
68
69static inline void gpio_set_value(unsigned int gpio, int value)
70{
71 __gpio_set_value(gpio, value);
72}
73
74static inline int gpio_cansleep(unsigned int gpio)
75{
76 return __gpio_cansleep(gpio);
77}
78
79static inline int gpio_to_irq(unsigned int gpio)
80{
81 return __gpio_to_irq(gpio);
82}
83
84static inline int irq_to_gpio(unsigned int irq)
85{
86 return -EINVAL;
87}
88
89#endif
90
91
92
93struct device;
94
95int devm_gpio_request(struct device *dev, unsigned gpio, const char *label);
96int devm_gpio_request_one(struct device *dev, unsigned gpio,
97 unsigned long flags, const char *label);
98void devm_gpio_free(struct device *dev, unsigned int gpio);
99
100#else
101
102#include <linux/kernel.h>
103#include <linux/types.h>
104#include <linux/bug.h>
105
106struct device;
107struct gpio_chip;
108
109static inline bool gpio_is_valid(int number)
110{
111 return false;
112}
113
114static inline int gpio_request(unsigned gpio, const char *label)
115{
116 return -ENOSYS;
117}
118
119static inline int gpio_request_one(unsigned gpio,
120 unsigned long flags, const char *label)
121{
122 return -ENOSYS;
123}
124
125static inline int gpio_request_array(const struct gpio *array, size_t num)
126{
127 return -ENOSYS;
128}
129
130static inline void gpio_free(unsigned gpio)
131{
132 might_sleep();
133
134
135 WARN_ON(1);
136}
137
138static inline void gpio_free_array(const struct gpio *array, size_t num)
139{
140 might_sleep();
141
142
143 WARN_ON(1);
144}
145
146static inline int gpio_direction_input(unsigned gpio)
147{
148 return -ENOSYS;
149}
150
151static inline int gpio_direction_output(unsigned gpio, int value)
152{
153 return -ENOSYS;
154}
155
156static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
157{
158 return -ENOSYS;
159}
160
161static inline int gpio_get_value(unsigned gpio)
162{
163
164 WARN_ON(1);
165 return 0;
166}
167
168static inline void gpio_set_value(unsigned gpio, int value)
169{
170
171 WARN_ON(1);
172}
173
174static inline int gpio_cansleep(unsigned gpio)
175{
176
177 WARN_ON(1);
178 return 0;
179}
180
181static inline int gpio_get_value_cansleep(unsigned gpio)
182{
183
184 WARN_ON(1);
185 return 0;
186}
187
188static inline void gpio_set_value_cansleep(unsigned gpio, int value)
189{
190
191 WARN_ON(1);
192}
193
194static inline int gpio_export(unsigned gpio, bool direction_may_change)
195{
196
197 WARN_ON(1);
198 return -EINVAL;
199}
200
201static inline int gpio_export_link(struct device *dev, const char *name,
202 unsigned gpio)
203{
204
205 WARN_ON(1);
206 return -EINVAL;
207}
208
209static inline void gpio_unexport(unsigned gpio)
210{
211
212 WARN_ON(1);
213}
214
215static inline int gpio_to_irq(unsigned gpio)
216{
217
218 WARN_ON(1);
219 return -EINVAL;
220}
221
222static inline int irq_to_gpio(unsigned irq)
223{
224
225 WARN_ON(1);
226 return -EINVAL;
227}
228
229static inline int devm_gpio_request(struct device *dev, unsigned gpio,
230 const char *label)
231{
232 WARN_ON(1);
233 return -EINVAL;
234}
235
236static inline int devm_gpio_request_one(struct device *dev, unsigned gpio,
237 unsigned long flags, const char *label)
238{
239 WARN_ON(1);
240 return -EINVAL;
241}
242
243static inline void devm_gpio_free(struct device *dev, unsigned int gpio)
244{
245 WARN_ON(1);
246}
247
248#endif
249
250#endif
251