[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;

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