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Commit 45abc49d authored by Sonic Zhang's avatar Sonic Zhang Committed by Bob Liu
Browse files

blackfin: GPIO: Implement more GPIO APIs 



Implement more GPIO APIs in case GPIOLIB is disabled.

Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarBob Liu <lliubbo@gmail.com>
parent 494b7948

arch/blackfin/include/asm/gpio.h

+44 −0
Original line number Diff line number Diff line
@@ -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);