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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; |
4e4438b8 | 16 | struct gpio_chip; |
a4177ee7 | 17 | |
7560fa60 DB |
18 | /* |
19 | * Some platforms don't support the GPIO programming interface. | |
20 | * | |
21 | * In case some driver uses it anyway (it should normally have | |
22 | * depended on GENERIC_GPIO), these routines help the compiler | |
23 | * optimize out much GPIO-related code ... or trigger a runtime | |
24 | * warning when something is wrongly called. | |
25 | */ | |
26 | ||
27 | static inline int gpio_is_valid(int number) | |
28 | { | |
29 | return 0; | |
30 | } | |
31 | ||
32 | static inline int gpio_request(unsigned gpio, const char *label) | |
33 | { | |
34 | return -ENOSYS; | |
35 | } | |
36 | ||
37 | static inline void gpio_free(unsigned gpio) | |
38 | { | |
3d599d1c UKK |
39 | might_sleep(); |
40 | ||
7560fa60 DB |
41 | /* GPIO can never have been requested */ |
42 | WARN_ON(1); | |
43 | } | |
44 | ||
45 | static inline int gpio_direction_input(unsigned gpio) | |
46 | { | |
47 | return -ENOSYS; | |
48 | } | |
49 | ||
50 | static inline int gpio_direction_output(unsigned gpio, int value) | |
51 | { | |
52 | return -ENOSYS; | |
53 | } | |
54 | ||
c4b5be98 FB |
55 | static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) |
56 | { | |
57 | return -ENOSYS; | |
58 | } | |
59 | ||
7560fa60 DB |
60 | static inline int gpio_get_value(unsigned gpio) |
61 | { | |
62 | /* GPIO can never have been requested or set as {in,out}put */ | |
63 | WARN_ON(1); | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static inline void gpio_set_value(unsigned gpio, int value) | |
68 | { | |
69 | /* GPIO can never have been requested or set as output */ | |
70 | WARN_ON(1); | |
71 | } | |
72 | ||
73 | static inline int gpio_cansleep(unsigned gpio) | |
74 | { | |
75 | /* GPIO can never have been requested or set as {in,out}put */ | |
76 | WARN_ON(1); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static inline int gpio_get_value_cansleep(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_cansleep(unsigned gpio, int value) | |
88 | { | |
89 | /* GPIO can never have been requested or set as output */ | |
90 | WARN_ON(1); | |
91 | } | |
92 | ||
d8f388d8 DB |
93 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
94 | { | |
95 | /* GPIO can never have been requested or set as {in,out}put */ | |
96 | WARN_ON(1); | |
97 | return -EINVAL; | |
98 | } | |
99 | ||
a4177ee7 JN |
100 | static inline int gpio_export_link(struct device *dev, const char *name, |
101 | unsigned gpio) | |
102 | { | |
103 | /* GPIO can never have been exported */ | |
104 | WARN_ON(1); | |
105 | return -EINVAL; | |
106 | } | |
107 | ||
07697461 JN |
108 | static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) |
109 | { | |
110 | /* GPIO can never have been requested */ | |
111 | WARN_ON(1); | |
112 | return -EINVAL; | |
113 | } | |
a4177ee7 | 114 | |
d8f388d8 DB |
115 | static inline void gpio_unexport(unsigned gpio) |
116 | { | |
117 | /* GPIO can never have been exported */ | |
118 | WARN_ON(1); | |
119 | } | |
120 | ||
7560fa60 DB |
121 | static inline int gpio_to_irq(unsigned gpio) |
122 | { | |
123 | /* GPIO can never have been requested or set as input */ | |
124 | WARN_ON(1); | |
125 | return -EINVAL; | |
126 | } | |
127 | ||
128 | static inline int irq_to_gpio(unsigned irq) | |
129 | { | |
130 | /* irq can never have been returned from gpio_to_irq() */ | |
131 | WARN_ON(1); | |
132 | return -EINVAL; | |
133 | } | |
134 | ||
135 | #endif | |
136 | ||
137 | #endif /* __LINUX_GPIO_H */ |