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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 JN |
15 | struct device; |
16 | ||
7560fa60 DB |
17 | /* |
18 | * Some platforms don't support the GPIO programming interface. | |
19 | * | |
20 | * In case some driver uses it anyway (it should normally have | |
21 | * depended on GENERIC_GPIO), these routines help the compiler | |
22 | * optimize out much GPIO-related code ... or trigger a runtime | |
23 | * warning when something is wrongly called. | |
24 | */ | |
25 | ||
26 | static inline int gpio_is_valid(int number) | |
27 | { | |
28 | return 0; | |
29 | } | |
30 | ||
31 | static inline int gpio_request(unsigned gpio, const char *label) | |
32 | { | |
33 | return -ENOSYS; | |
34 | } | |
35 | ||
36 | static inline void gpio_free(unsigned gpio) | |
37 | { | |
3d599d1c UKK |
38 | might_sleep(); |
39 | ||
7560fa60 DB |
40 | /* GPIO can never have been requested */ |
41 | WARN_ON(1); | |
42 | } | |
43 | ||
44 | static inline int gpio_direction_input(unsigned gpio) | |
45 | { | |
46 | return -ENOSYS; | |
47 | } | |
48 | ||
49 | static inline int gpio_direction_output(unsigned gpio, int value) | |
50 | { | |
51 | return -ENOSYS; | |
52 | } | |
53 | ||
c4b5be98 FB |
54 | static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
55 | { | |
56 | return -ENOSYS; | |
57 | } | |
58 | ||
7560fa60 DB |
59 | static inline int gpio_get_value(unsigned gpio) |
60 | { | |
61 | /* GPIO can never have been requested or set as {in,out}put */ | |
62 | WARN_ON(1); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static inline void gpio_set_value(unsigned gpio, int value) | |
67 | { | |
68 | /* GPIO can never have been requested or set as output */ | |
69 | WARN_ON(1); | |
70 | } | |
71 | ||
72 | static inline int gpio_cansleep(unsigned gpio) | |
73 | { | |
74 | /* GPIO can never have been requested or set as {in,out}put */ | |
75 | WARN_ON(1); | |
76 | return 0; | |
77 | } | |
78 | ||
79 | static inline int gpio_get_value_cansleep(unsigned gpio) | |
80 | { | |
81 | /* GPIO can never have been requested or set as {in,out}put */ | |
82 | WARN_ON(1); | |
83 | return 0; | |
84 | } | |
85 | ||
86 | static inline void gpio_set_value_cansleep(unsigned gpio, int value) | |
87 | { | |
88 | /* GPIO can never have been requested or set as output */ | |
89 | WARN_ON(1); | |
90 | } | |
91 | ||
d8f388d8 DB |
92 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
93 | { | |
94 | /* GPIO can never have been requested or set as {in,out}put */ | |
95 | WARN_ON(1); | |
96 | return -EINVAL; | |
97 | } | |
98 | ||
a4177ee7 JN |
99 | static inline int gpio_export_link(struct device *dev, const char *name, |
100 | unsigned gpio) | |
101 | { | |
102 | /* GPIO can never have been exported */ | |
103 | WARN_ON(1); | |
104 | return -EINVAL; | |
105 | } | |
106 | ||
07697461 JN |
107 | static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
108 | { | |
109 | /* GPIO can never have been requested */ | |
110 | WARN_ON(1); | |
111 | return -EINVAL; | |
112 | } | |
a4177ee7 | 113 | |
d8f388d8 DB |
114 | static inline void gpio_unexport(unsigned gpio) |
115 | { | |
116 | /* GPIO can never have been exported */ | |
117 | WARN_ON(1); | |
118 | } | |
119 | ||
7560fa60 DB |
120 | static inline int gpio_to_irq(unsigned gpio) |
121 | { | |
122 | /* GPIO can never have been requested or set as input */ | |
123 | WARN_ON(1); | |
124 | return -EINVAL; | |
125 | } | |
126 | ||
127 | static inline int irq_to_gpio(unsigned irq) | |
128 | { | |
129 | /* irq can never have been returned from gpio_to_irq() */ | |
130 | WARN_ON(1); | |
131 | return -EINVAL; | |
132 | } | |
133 | ||
134 | #endif | |
135 | ||
136 | #endif /* __LINUX_GPIO_H */ |