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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 | ||
7560fa60 DB |
17 | #ifdef CONFIG_GENERIC_GPIO |
18 | #include <asm/gpio.h> | |
19 | ||
20 | #else | |
21 | ||
3d599d1c | 22 | #include <linux/kernel.h> |
6ea0205b DB |
23 | #include <linux/types.h> |
24 | #include <linux/errno.h> | |
25 | ||
a4177ee7 | 26 | struct device; |
5f829e40 | 27 | struct gpio; |
4e4438b8 | 28 | struct gpio_chip; |
a4177ee7 | 29 | |
7560fa60 DB |
30 | /* |
31 | * Some platforms don't support the GPIO programming interface. | |
32 | * | |
33 | * In case some driver uses it anyway (it should normally have | |
34 | * depended on GENERIC_GPIO), these routines help the compiler | |
35 | * optimize out much GPIO-related code ... or trigger a runtime | |
36 | * warning when something is wrongly called. | |
37 | */ | |
38 | ||
3474cb3c | 39 | static inline bool gpio_is_valid(int number) |
7560fa60 | 40 | { |
3474cb3c | 41 | return false; |
7560fa60 DB |
42 | } |
43 | ||
d8a3515e | 44 | static inline int gpio_request(unsigned gpio, const char *label) |
7560fa60 DB |
45 | { |
46 | return -ENOSYS; | |
47 | } | |
48 | ||
323b7fe8 | 49 | static inline int gpio_request_one(unsigned gpio, |
5f829e40 WS |
50 | unsigned long flags, const char *label) |
51 | { | |
52 | return -ENOSYS; | |
53 | } | |
54 | ||
7c295975 | 55 | static inline int gpio_request_array(const struct gpio *array, size_t num) |
5f829e40 WS |
56 | { |
57 | return -ENOSYS; | |
58 | } | |
59 | ||
7560fa60 DB |
60 | static inline void gpio_free(unsigned gpio) |
61 | { | |
3d599d1c UKK |
62 | might_sleep(); |
63 | ||
7560fa60 DB |
64 | /* GPIO can never have been requested */ |
65 | WARN_ON(1); | |
66 | } | |
67 | ||
7c295975 | 68 | static inline void gpio_free_array(const struct gpio *array, size_t num) |
5f829e40 WS |
69 | { |
70 | might_sleep(); | |
71 | ||
72 | /* GPIO can never have been requested */ | |
73 | WARN_ON(1); | |
74 | } | |
75 | ||
d8a3515e | 76 | static inline int gpio_direction_input(unsigned gpio) |
7560fa60 DB |
77 | { |
78 | return -ENOSYS; | |
79 | } | |
80 | ||
d8a3515e | 81 | static inline int gpio_direction_output(unsigned gpio, int value) |
7560fa60 DB |
82 | { |
83 | return -ENOSYS; | |
84 | } | |
85 | ||
c4b5be98 FB |
86 | static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
87 | { | |
88 | return -ENOSYS; | |
89 | } | |
90 | ||
7560fa60 DB |
91 | static inline int gpio_get_value(unsigned gpio) |
92 | { | |
93 | /* GPIO can never have been requested or set as {in,out}put */ | |
94 | WARN_ON(1); | |
95 | return 0; | |
96 | } | |
97 | ||
98 | static inline void gpio_set_value(unsigned gpio, int value) | |
99 | { | |
100 | /* GPIO can never have been requested or set as output */ | |
101 | WARN_ON(1); | |
102 | } | |
103 | ||
104 | static inline int gpio_cansleep(unsigned gpio) | |
105 | { | |
106 | /* GPIO can never have been requested or set as {in,out}put */ | |
107 | WARN_ON(1); | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static inline int gpio_get_value_cansleep(unsigned gpio) | |
112 | { | |
113 | /* GPIO can never have been requested or set as {in,out}put */ | |
114 | WARN_ON(1); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static inline void gpio_set_value_cansleep(unsigned gpio, int value) | |
119 | { | |
120 | /* GPIO can never have been requested or set as output */ | |
121 | WARN_ON(1); | |
122 | } | |
123 | ||
d8f388d8 DB |
124 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
125 | { | |
126 | /* GPIO can never have been requested or set as {in,out}put */ | |
127 | WARN_ON(1); | |
128 | return -EINVAL; | |
129 | } | |
130 | ||
a4177ee7 JN |
131 | static inline int gpio_export_link(struct device *dev, const char *name, |
132 | unsigned gpio) | |
133 | { | |
134 | /* GPIO can never have been exported */ | |
135 | WARN_ON(1); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
07697461 JN |
139 | static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
140 | { | |
141 | /* GPIO can never have been requested */ | |
142 | WARN_ON(1); | |
143 | return -EINVAL; | |
144 | } | |
a4177ee7 | 145 | |
d8f388d8 DB |
146 | static inline void gpio_unexport(unsigned gpio) |
147 | { | |
148 | /* GPIO can never have been exported */ | |
149 | WARN_ON(1); | |
150 | } | |
151 | ||
7560fa60 DB |
152 | static inline int gpio_to_irq(unsigned gpio) |
153 | { | |
154 | /* GPIO can never have been requested or set as input */ | |
155 | WARN_ON(1); | |
156 | return -EINVAL; | |
157 | } | |
158 | ||
159 | static inline int irq_to_gpio(unsigned irq) | |
160 | { | |
161 | /* irq can never have been returned from gpio_to_irq() */ | |
162 | WARN_ON(1); | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
166 | #endif | |
167 | ||
168 | #endif /* __LINUX_GPIO_H */ |