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Commit 803a8d2a authored by Michael Hennerich's avatar Michael Hennerich Committed by Bryan Wu
Browse files

Blackfin arch: Add workaround to read edge triggered GPIOs 



Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent 92322da9

arch/blackfin/kernel/bfin_gpio.c

+19 −0
Original line number Diff line number Diff line
@@ -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;

include/asm-blackfin/gpio.h

+0 −1
Original line number Diff line number Diff line
@@ -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