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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 | ||
6ea0205b DB |
11 | #include <linux/types.h> |
12 | #include <linux/errno.h> | |
13 | ||
7560fa60 DB |
14 | /* |
15 | * Some platforms don't support the GPIO programming interface. | |
16 | * | |
17 | * In case some driver uses it anyway (it should normally have | |
18 | * depended on GENERIC_GPIO), these routines help the compiler | |
19 | * optimize out much GPIO-related code ... or trigger a runtime | |
20 | * warning when something is wrongly called. | |
21 | */ | |
22 | ||
23 | static inline int gpio_is_valid(int number) | |
24 | { | |
25 | return 0; | |
26 | } | |
27 | ||
28 | static inline int gpio_request(unsigned gpio, const char *label) | |
29 | { | |
30 | return -ENOSYS; | |
31 | } | |
32 | ||
33 | static inline void gpio_free(unsigned gpio) | |
34 | { | |
35 | /* GPIO can never have been requested */ | |
36 | WARN_ON(1); | |
37 | } | |
38 | ||
39 | static inline int gpio_direction_input(unsigned gpio) | |
40 | { | |
41 | return -ENOSYS; | |
42 | } | |
43 | ||
44 | static inline int gpio_direction_output(unsigned gpio, int value) | |
45 | { | |
46 | return -ENOSYS; | |
47 | } | |
48 | ||
49 | static inline int gpio_get_value(unsigned gpio) | |
50 | { | |
51 | /* GPIO can never have been requested or set as {in,out}put */ | |
52 | WARN_ON(1); | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static inline void gpio_set_value(unsigned gpio, int value) | |
57 | { | |
58 | /* GPIO can never have been requested or set as output */ | |
59 | WARN_ON(1); | |
60 | } | |
61 | ||
62 | static inline int gpio_cansleep(unsigned gpio) | |
63 | { | |
64 | /* GPIO can never have been requested or set as {in,out}put */ | |
65 | WARN_ON(1); | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static inline int gpio_get_value_cansleep(unsigned gpio) | |
70 | { | |
71 | /* GPIO can never have been requested or set as {in,out}put */ | |
72 | WARN_ON(1); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static inline void gpio_set_value_cansleep(unsigned gpio, int value) | |
77 | { | |
78 | /* GPIO can never have been requested or set as output */ | |
79 | WARN_ON(1); | |
80 | } | |
81 | ||
82 | static inline int gpio_to_irq(unsigned gpio) | |
83 | { | |
84 | /* GPIO can never have been requested or set as input */ | |
85 | WARN_ON(1); | |
86 | return -EINVAL; | |
87 | } | |
88 | ||
89 | static inline int irq_to_gpio(unsigned irq) | |
90 | { | |
91 | /* irq can never have been returned from gpio_to_irq() */ | |
92 | WARN_ON(1); | |
93 | return -EINVAL; | |
94 | } | |
95 | ||
96 | #endif | |
97 | ||
98 | #endif /* __LINUX_GPIO_H */ |