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