diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/gpio.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/gpio.h b/include/gpio.h index f33b43550c..4a97521aee 100644 --- a/include/gpio.h +++ b/include/gpio.h @@ -6,6 +6,25 @@ #define GPIOF_DIR_OUT (0 << 0) #define GPIOF_DIR_IN (1 << 0) +#define GPIOF_INIT_LOW (0 << 1) +#define GPIOF_INIT_HIGH (1 << 1) + +#define GPIOF_IN (GPIOF_DIR_IN) +#define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW) +#define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH) + +/** + * struct gpio - a structure describing a GPIO with configuration + * @gpio: the GPIO number + * @flags: GPIO configuration as specified by GPIOF_* + * @label: a literal description string of this GPIO + */ +struct gpio { + unsigned gpio; + unsigned long flags; + const char *label; +}; + #ifndef CONFIG_GPIOLIB static inline int gpio_request(unsigned gpio, const char *label) { @@ -15,9 +34,29 @@ static inline int gpio_request(unsigned gpio, const char *label) static inline void gpio_free(unsigned gpio) { } + +static inline int gpio_request_one(unsigned gpio, + unsigned long flags, const char *label) +{ + return -ENOSYS; +} + +static inline int gpio_request_array(const struct gpio *array, size_t num) +{ + return -ENOSYS; +} + +static inline void gpio_free_array(const struct gpio *array, size_t num) +{ + /* GPIO can never have been requested */ + WARN_ON(1); +} #else int gpio_request(unsigned gpio, const char *label); void gpio_free(unsigned gpio); +int gpio_request_one(unsigned gpio, unsigned long flags, const char *label); +int gpio_request_array(const struct gpio *array, size_t num); +void gpio_free_array(const struct gpio *array, size_t num); #endif struct gpio_chip; |