diff options
| author | Michael Hennerich <michael.hennerich@analog.com> | 2008-05-17 16:01:51 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-05-17 16:01:51 +0800 |
| commit | 803a8d2acbf220aeb27f0a98dacb36d4af3d6559 (patch) | |
| tree | 7454a713f9fdd65a40d6881eb8ccca4f537dd7df | |
| parent | 92322da9b568a5ddc3ab872491bdc0f1b47ef904 (diff) | |
| download | blackbird-op-linux-803a8d2acbf220aeb27f0a98dacb36d4af3d6559.tar.gz blackbird-op-linux-803a8d2acbf220aeb27f0a98dacb36d4af3d6559.zip | |
Blackfin arch: Add workaround to read edge triggered GPIOs
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
| -rw-r--r-- | arch/blackfin/kernel/bfin_gpio.c | 19 | ||||
| -rw-r--r-- | include/asm-blackfin/gpio.h | 1 |
2 files changed, 19 insertions, 1 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 7e8eaf4a31bb..b6d89d1644cc 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -1130,6 +1130,25 @@ void bfin_gpio_irq_prepare(unsigned gpio) #else +int gpio_get_value(unsigned gpio) +{ + unsigned long flags; + int ret; + + if (unlikely(get_gpio_edge(gpio))) { + local_irq_save(flags); + set_gpio_edge(gpio, 0); + ret = get_gpio_data(gpio); + set_gpio_edge(gpio, 1); + local_irq_restore(flags); + + return ret; + } else + return get_gpio_data(gpio); +} +EXPORT_SYMBOL(gpio_get_value); + + int gpio_direction_input(unsigned gpio) { unsigned long flags; diff --git a/include/asm-blackfin/gpio.h b/include/asm-blackfin/gpio.h index 27ff532a806c..ff95e9d88342 100644 --- a/include/asm-blackfin/gpio.h +++ b/include/asm-blackfin/gpio.h @@ -437,7 +437,6 @@ void gpio_set_value(unsigned gpio, int arg); int gpio_get_value(unsigned gpio); #ifndef BF548_FAMILY -#define gpio_get_value(gpio) get_gpio_data(gpio) #define gpio_set_value(gpio, value) set_gpio_data(gpio, value) #endif |
