projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| d8f388d8 DB |
82 | static inline int gpio_export(unsigned gpio, bool direction_may_change) |
| 83 | { | |
| 84 | /* GPIO can never have been requested or set as {in,out}put */ | |
| 85 | WARN_ON(1); | |
| 86 | return -EINVAL; | |
| 87 | } | |
| 88 | ||
| 89 | static inline void gpio_unexport(unsigned gpio) | |
| 90 | { | |
| 91 | /* GPIO can never have been exported */ | |
| 92 | WARN_ON(1); | |
| 93 | } | |
| 94 | ||
| 7560fa60 DB |
95 | static inline int gpio_to_irq(unsigned gpio) |
| 96 | { | |
| 97 | /* GPIO can never have been requested or set as input */ | |
| 98 | WARN_ON(1); | |
| 99 | return -EINVAL; | |
| 100 | } | |
| 101 | ||
| 102 | static inline int irq_to_gpio(unsigned irq) | |
| 103 | { | |
| 104 | /* irq can never have been returned from gpio_to_irq() */ | |
| 105 | WARN_ON(1); | |
| 106 | return -EINVAL; | |
| 107 | } | |
| 108 | ||
| 109 | #endif | |
| 110 | ||
| 111 | #endif /* __LINUX_GPIO_H */ |