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| 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 /arch/blackfin | |
| parent | 92322da9b568a5ddc3ab872491bdc0f1b47ef904 (diff) | |
| download | op-kernel-dev-803a8d2acbf220aeb27f0a98dacb36d4af3d6559.zip op-kernel-dev-803a8d2acbf220aeb27f0a98dacb36d4af3d6559.tar.gz | |
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>
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/kernel/bfin_gpio.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 7e8eaf4..b6d89d1 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; |
