[net-next-2.6.git] / include / linux / gpio.h

#ifndef __LINUX_GPIO_H
#define __LINUX_GPIO_H

/* see Documentation/gpio.txt */

#ifdef CONFIG_GENERIC_GPIO
#include <asm/gpio.h>

#else

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>

struct device;
struct gpio_chip;

/*
 * Some platforms don't support the GPIO programming interface.
 *
 * In case some driver uses it anyway (it should normally have
 * depended on GENERIC_GPIO), these routines help the compiler
 * optimize out much GPIO-related code ... or trigger a runtime
 * warning when something is wrongly called.
 */

static inline int gpio_is_valid(int number)
{
	return 0;
}

static inline int gpio_request(unsigned gpio, const char *label)
{
	return -ENOSYS;
}

static inline void gpio_free(unsigned gpio)
{
	might_sleep();

	/* GPIO can never have been requested */
	WARN_ON(1);
}

static inline int gpio_direction_input(unsigned gpio)
{
	return -ENOSYS;
}

static inline int gpio_direction_output(unsigned gpio, int value)
{
	return -ENOSYS;
}

static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
{
	return -ENOSYS;
}

static inline int gpio_get_value(unsigned gpio)
{
	/* GPIO can never have been requested or set as {in,out}put */
	WARN_ON(1);
	return 0;
}

static inline void gpio_set_value(unsigned gpio, int value)
{
	/* GPIO can never have been requested or set as output */
	WARN_ON(1);
}

static inline int gpio_cansleep(unsigned gpio)
{
	/* GPIO can never have been requested or set as {in,out}put */
	WARN_ON(1);
	return 0;
}

static inline int gpio_get_value_cansleep(unsigned gpio)
{
	/* GPIO can never have been requested or set as {in,out}put */
	WARN_ON(1);
	return 0;
}

static inline void gpio_set_value_cansleep(unsigned gpio, int value)
{
	/* GPIO can never have been requested or set as output */
	WARN_ON(1);
}

static inline int gpio_export(unsigned gpio, bool direction_may_change)
{
	/* GPIO can never have been requested or set as {in,out}put */
	WARN_ON(1);
	return -EINVAL;
}

static inline int gpio_export_link(struct device *dev, const char *name,
				unsigned gpio)
{
	/* GPIO can never have been exported */
	WARN_ON(1);
	return -EINVAL;
}

static inline int gpio_sysfs_set_active_low(unsigned gpio, int value)
{
	/* GPIO can never have been requested */
	WARN_ON(1);
	return -EINVAL;
}

static inline void gpio_unexport(unsigned gpio)
{
	/* GPIO can never have been exported */
	WARN_ON(1);
}

static inline int gpio_to_irq(unsigned gpio)
{
	/* GPIO can never have been requested or set as input */
	WARN_ON(1);
	return -EINVAL;
}

static inline int irq_to_gpio(unsigned irq)
{
	/* irq can never have been returned from gpio_to_irq() */
	WARN_ON(1);
	return -EINVAL;
}

#endif

#endif /* __LINUX_GPIO_H */
Commit	Line	Data
7560fa60 DB	1	#ifndef __LINUX_GPIO_H
	2	#define __LINUX_GPIO_H
	3
	4	/* see Documentation/gpio.txt */
	5
	6	#ifdef CONFIG_GENERIC_GPIO
	7	#include <asm/gpio.h>
	8
	9	#else
	10
3d599d1c	11	#include <linux/kernel.h>
6ea0205b DB	12	#include <linux/types.h>
	13	#include <linux/errno.h>
	14
a4177ee7	15	struct device;
4e4438b8	16	struct gpio_chip;
a4177ee7	17
7560fa60 DB	18	/*
	19	* Some platforms don't support the GPIO programming interface.
	20	*
	21	* In case some driver uses it anyway (it should normally have
	22	* depended on GENERIC_GPIO), these routines help the compiler
	23	* optimize out much GPIO-related code ... or trigger a runtime
	24	* warning when something is wrongly called.
	25	*/
	26
	27	static inline int gpio_is_valid(int number)
	28	{
	29	return 0;
	30	}
	31
	32	static inline int gpio_request(unsigned gpio, const char *label)
	33	{
	34	return -ENOSYS;
	35	}
	36
	37	static inline void gpio_free(unsigned gpio)
	38	{
3d599d1c UKK	39	might_sleep();
3d599d1c UKK	40
7560fa60 DB	41	/* GPIO can never have been requested */
	42	WARN_ON(1);
	43	}
	44
	45	static inline int gpio_direction_input(unsigned gpio)
	46	{
	47	return -ENOSYS;
	48	}
	49
	50	static inline int gpio_direction_output(unsigned gpio, int value)
	51	{
	52	return -ENOSYS;
	53	}
	54
c4b5be98 FB	55	static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
	56	{
	57	return -ENOSYS;
	58	}
	59
7560fa60 DB	60	static inline int gpio_get_value(unsigned gpio)
	61	{
	62	/* GPIO can never have been requested or set as {in,out}put */
	63	WARN_ON(1);
	64	return 0;
	65	}
	66
	67	static inline void gpio_set_value(unsigned gpio, int value)
	68	{
	69	/* GPIO can never have been requested or set as output */
	70	WARN_ON(1);
	71	}
	72
	73	static inline int gpio_cansleep(unsigned gpio)
	74	{
	75	/* GPIO can never have been requested or set as {in,out}put */
	76	WARN_ON(1);
	77	return 0;
	78	}
	79
	80	static inline int gpio_get_value_cansleep(unsigned gpio)
	81	{
	82	/* GPIO can never have been requested or set as {in,out}put */
	83	WARN_ON(1);
	84	return 0;
	85	}
	86
	87	static inline void gpio_set_value_cansleep(unsigned gpio, int value)
	88	{
	89	/* GPIO can never have been requested or set as output */
	90	WARN_ON(1);
	91	}
	92
d8f388d8 DB	93	static inline int gpio_export(unsigned gpio, bool direction_may_change)
	94	{
	95	/* GPIO can never have been requested or set as {in,out}put */
	96	WARN_ON(1);
	97	return -EINVAL;
	98	}
	99
a4177ee7 JN	100	static inline int gpio_export_link(struct device dev, const char name,
	101	unsigned gpio)
	102	{
	103	/* GPIO can never have been exported */
	104	WARN_ON(1);
	105	return -EINVAL;
	106	}
	107
07697461 JN	108	static inline int gpio_sysfs_set_active_low(unsigned gpio, int value)
	109	{
	110	/* GPIO can never have been requested */
	111	WARN_ON(1);
	112	return -EINVAL;
	113	}
a4177ee7	114
d8f388d8 DB	115	static inline void gpio_unexport(unsigned gpio)
	116	{
	117	/* GPIO can never have been exported */
	118	WARN_ON(1);
	119	}
	120
7560fa60 DB	121	static inline int gpio_to_irq(unsigned gpio)
	122	{
	123	/* GPIO can never have been requested or set as input */
	124	WARN_ON(1);
	125	return -EINVAL;
	126	}
	127
	128	static inline int irq_to_gpio(unsigned irq)
	129	{
	130	/* irq can never have been returned from gpio_to_irq() */
	131	WARN_ON(1);
	132	return -EINVAL;
	133	}
	134
	135	#endif
	136
	137	#endif /* __LINUX_GPIO_H */