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7560fa60 DB |
1 | #ifndef __LINUX_GPIO_H |
2 | #define __LINUX_GPIO_H | |
3 | ||
4 | /* see Documentation/gpio.txt */ | |
5 | ||
6 | #ifdef CONFIG_GENERIC_GPIO | |
7 | #include <asm/gpio.h> | |
8 | ||
9 | #else | |
10 | ||
3d599d1c | 11 | #include <linux/kernel.h> |
6ea0205b DB |
12 | #include <linux/types.h> |
13 | #include <linux/errno.h> | |
14 | ||
a4177ee7 | 15 | struct device; |
5f829e40 | 16 | struct gpio; |
4e4438b8 | 17 | struct gpio_chip; |
a4177ee7 | 18 | |
7560fa60 DB |
19 | /* |
20 | * Some platforms don't support the GPIO programming interface. | |
21 | * | |
22 | * In case some driver uses it anyway (it should normally have | |
23 | * depended on GENERIC_GPIO), these routines help the compiler | |
24 | * optimize out much GPIO-related code ... or trigger a runtime | |
25 | * warning when something is wrongly called. | |
26 | */ | |
27 | ||
28 | static inline int gpio_is_valid(int number) | |
29 | { | |
30 | return 0; | |
31 | } | |
32 | ||
0fdae42d | 33 | static inline int __must_check gpio_request(unsigned gpio, const char *label) |
7560fa60 DB |
34 | { |
35 | return -ENOSYS; | |
36 | } | |
37 | ||
5f829e40 WS |
38 | static inline int __must_check gpio_request_one(unsigned gpio, |
39 | unsigned long flags, const char *label) | |
40 | { | |
41 | return -ENOSYS; | |
42 | } | |
43 | ||
44 | static inline int __must_check gpio_request_array(struct gpio *array, size_t num) | |
45 | { | |
46 | return -ENOSYS; | |
47 | } | |
48 | ||
7560fa60 DB |
49 | static inline void gpio_free(unsigned gpio) |
50 | { | |
3d599d1c UKK |
51 | might_sleep(); |
52 | ||
7560fa60 DB |
53 | /* GPIO can never have been requested */ |
54 | WARN_ON(1); | |
55 | } | |
56 | ||
5f829e40 WS |
57 | static inline void gpio_free_array(struct gpio *array, size_t num) |
58 | { | |
59 | might_sleep(); | |
60 | ||
61 | /* GPIO can never have been requested */ | |
62 | WARN_ON(1); | |
63 | } | |
64 | ||
0fdae42d | 65 | static inline int __must_check gpio_direction_input(unsigned gpio) |
7560fa60 DB |
66 | { |
67 | return -ENOSYS; | |
68 | } | |
69 | ||
0fdae42d | 70 | static inline int __must_check gpio_direction_output(unsigned gpio, int value) |
7560fa60 DB |
71 | { |
72 | return -ENOSYS; | |
73 | } | |
74 | ||
c4b5be98 FB |
75 | static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
76 | { | |
77 | return -ENOSYS; | |
78 | } | |
79 | ||
7560fa60 DB |
80 | static inline int gpio_get_value(unsigned gpio) |
81 | { | |
82 | /* GPIO can never have been requested or set as {in,out}put */ | |
83 | WARN_ON(1); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static inline void gpio_set_value(unsigned gpio, int value) | |
88 | { | |
89 | /* GPIO can never have been requested or set as output */ | |
90 | WARN_ON(1); | |
91 | } | |
92 | ||
93 | static inline int gpio_cansleep(unsigned gpio) | |
94 | { | |
95 | /* GPIO can never have been requested or set as {in,out}put */ | |
96 | WARN_ON(1); | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static inline int gpio_get_value_cansleep(unsigned gpio) | |
101 | { | |
102 | /* GPIO can never have been requested or set as {in,out}put */ | |
103 | WARN_ON(1); | |
104 | return 0; | |
105 | } | |
106 | ||
107 | static inline void gpio_set_value_cansleep(unsigned gpio, int value) | |
108 | { | |
109 | /* GPIO can never have been requested or set as output */ | |
110 | WARN_ON(1); | |
111 | } | |
112 | ||
d8f388d8 DB |
113 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
114 | { | |
115 | /* GPIO can never have been requested or set as {in,out}put */ | |
116 | WARN_ON(1); | |
117 | return -EINVAL; | |
118 | } | |
119 | ||
a4177ee7 JN |
120 | static inline int gpio_export_link(struct device *dev, const char *name, |
121 | unsigned gpio) | |
122 | { | |
123 | /* GPIO can never have been exported */ | |
124 | WARN_ON(1); | |
125 | return -EINVAL; | |
126 | } | |
127 | ||
07697461 JN |
128 | static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
129 | { | |
130 | /* GPIO can never have been requested */ | |
131 | WARN_ON(1); | |
132 | return -EINVAL; | |
133 | } | |
a4177ee7 | 134 | |
d8f388d8 DB |
135 | static inline void gpio_unexport(unsigned gpio) |
136 | { | |
137 | /* GPIO can never have been exported */ | |
138 | WARN_ON(1); | |
139 | } | |
140 | ||
7560fa60 DB |
141 | static inline int gpio_to_irq(unsigned gpio) |
142 | { | |
143 | /* GPIO can never have been requested or set as input */ | |
144 | WARN_ON(1); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | static inline int irq_to_gpio(unsigned irq) | |
149 | { | |
150 | /* irq can never have been returned from gpio_to_irq() */ | |
151 | WARN_ON(1); | |
152 | return -EINVAL; | |
153 | } | |
154 | ||
155 | #endif | |
156 | ||
157 | #endif /* __LINUX_GPIO_H */ |