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>
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 @@
#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 27ff532..ff95e9d 100644
--- a/include/asm-blackfin/gpio.h
+++ b/include/asm-blackfin/gpio.h
@@ -437,7 +437,6 @@
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