OpenRISC: GPIO

/*

 * OpenRISC Linux

 *

 * Linux architectural port borrowing liberally from similar works of

 * others.  All original copyrights apply as per the original source

 * declaration.

 *

 * OpenRISC implementation:

 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>

 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>

 * et al.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

#ifndef __ASM_OPENRISC_GPIO_H

#define __ASM_OPENRISC_GPIO_H

#include <linux/errno.h>

#include <asm-generic/gpio.h>

#ifdef CONFIG_GPIOLIB

/*

 * OpenRISC (or1k) does not have on-chip GPIO's so there is not really

 * any standardized implementation that makes sense here.  If passing

 * through gpiolib becomes a bottleneck then it may make sense, on a

 * case-by-case basis, to implement these inlined/rapid versions.

 *

 * Just call gpiolib.

 */

static inline int gpio_get_value(unsigned int gpio)

{

	return __gpio_get_value(gpio);

}

static inline void gpio_set_value(unsigned int gpio, int value)

{

	__gpio_set_value(gpio, value);

}

static inline int gpio_cansleep(unsigned int gpio)

{

	return __gpio_cansleep(gpio);

}

/*

 * Not implemented, yet.

 */

static inline int gpio_to_irq(unsigned int gpio)

{

	return -ENOSYS;

}

static inline int irq_to_gpio(unsigned int irq)

{

	return -EINVAL;

}

#endif /* CONFIG_GPIOLIB */

#endif /* __ASM_OPENRISC_GPIO_H */