diff options
| author | Sonic Zhang <sonic.zhang@analog.com> | 2012-04-27 18:25:16 +0800 |
|---|---|---|
| committer | Bob Liu <lliubbo@gmail.com> | 2012-05-21 14:54:34 +0800 |
| commit | 45abc49d194539144b5dd510c82c03c36cbd3a58 (patch) | |
| tree | c088ed9f98279ba6191721c0d9d6fb9c3724704b | |
| parent | 494b794808c6b1ead80590c01b08a87850cc4724 (diff) | |
| download | linux-3.10-45abc49d194539144b5dd510c82c03c36cbd3a58.tar.gz linux-3.10-45abc49d194539144b5dd510c82c03c36cbd3a58.tar.bz2 linux-3.10-45abc49d194539144b5dd510c82c03c36cbd3a58.zip | |
blackfin: GPIO: Implement more GPIO APIs
Implement more GPIO APIs in case GPIOLIB is disabled.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
| -rw-r--r-- | arch/blackfin/include/asm/gpio.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/gpio.h b/arch/blackfin/include/asm/gpio.h index 12d3571b523..3d84d96f7c2 100644 --- a/arch/blackfin/include/asm/gpio.h +++ b/arch/blackfin/include/asm/gpio.h @@ -26,6 +26,7 @@ #ifndef __ASSEMBLY__ #include <linux/compiler.h> +#include <linux/gpio.h> /*********************************************************** * @@ -244,6 +245,49 @@ static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) return -EINVAL; } +static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label) +{ + int err; + + err = bfin_gpio_request(gpio, label); + if (err) + return err; + + if (flags & GPIOF_DIR_IN) + err = bfin_gpio_direction_input(gpio); + else + err = bfin_gpio_direction_output(gpio, + (flags & GPIOF_INIT_HIGH) ? 1 : 0); + + if (err) + bfin_gpio_free(gpio); + + return err; +} + +static inline int gpio_request_array(const struct gpio *array, size_t num) +{ + int i, err; + + for (i = 0; i < num; i++, array++) { + err = gpio_request_one(array->gpio, array->flags, array->label); + if (err) + goto err_free; + } + return 0; + +err_free: + while (i--) + bfin_gpio_free((--array)->gpio); + return err; +} + +static inline void gpio_free_array(const struct gpio *array, size_t num) +{ + while (num--) + bfin_gpio_free((array++)->gpio); +} + static inline int __gpio_get_value(unsigned gpio) { return bfin_gpio_get_value(gpio); |