[deliverable/linux.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;
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 int gpio_request_one(unsigned gpio,
					unsigned long flags, const char *label)
{
	return -ENOSYS;
}

static inline int gpio_request_array(struct gpio *array, size_t num)
{
	return -ENOSYS;
}

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

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

static inline void gpio_free_array(struct gpio *array, size_t num)
{
	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;
5f829e40	16	struct gpio;
4e4438b8	17	struct gpio_chip;
a4177ee7	18
7560fa60 DB	19	/*
	20	* Some platforms don't support the GPIO programming interface.
	21	*
	22	* In case some driver uses it anyway (it should normally have
	23	* depended on GENERIC_GPIO), these routines help the compiler
	24	* optimize out much GPIO-related code ... or trigger a runtime
	25	* warning when something is wrongly called.
	26	*/
	27
	28	static inline int gpio_is_valid(int number)
	29	{
	30	return 0;
	31	}
	32
d8a3515e	33	static inline int gpio_request(unsigned gpio, const char *label)
7560fa60 DB	34	{
	35	return -ENOSYS;
	36	}
	37
323b7fe8	38	static inline int gpio_request_one(unsigned gpio,
5f829e40 WS	39	unsigned long flags, const char *label)
	40	{
	41	return -ENOSYS;
	42	}
	43
323b7fe8	44	static inline int gpio_request_array(struct gpio *array, size_t num)
5f829e40 WS	45	{
	46	return -ENOSYS;
	47	}
	48
7560fa60 DB	49	static inline void gpio_free(unsigned gpio)
7560fa60 DB	50	{
3d599d1c UKK	51	might_sleep();
3d599d1c UKK	52
7560fa60 DB	53	/* GPIO can never have been requested */
	54	WARN_ON(1);
	55	}
	56
5f829e40 WS	57	static inline void gpio_free_array(struct gpio *array, size_t num)
	58	{
	59	might_sleep();
	60
	61	/* GPIO can never have been requested */
	62	WARN_ON(1);
	63	}
	64
d8a3515e	65	static inline int gpio_direction_input(unsigned gpio)
7560fa60 DB	66	{
	67	return -ENOSYS;
	68	}
	69
d8a3515e	70	static inline int gpio_direction_output(unsigned gpio, int value)
7560fa60 DB	71	{
	72	return -ENOSYS;
	73	}
	74
c4b5be98 FB	75	static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
	76	{
	77	return -ENOSYS;
	78	}
	79
7560fa60 DB	80	static inline int gpio_get_value(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(unsigned gpio, int value)
	88	{
	89	/* GPIO can never have been requested or set as output */
	90	WARN_ON(1);
	91	}
	92
	93	static inline int gpio_cansleep(unsigned gpio)
	94	{
	95	/* GPIO can never have been requested or set as {in,out}put */
	96	WARN_ON(1);
	97	return 0;
	98	}
	99
	100	static inline int gpio_get_value_cansleep(unsigned gpio)
	101	{
	102	/* GPIO can never have been requested or set as {in,out}put */
	103	WARN_ON(1);
	104	return 0;
	105	}
	106
	107	static inline void gpio_set_value_cansleep(unsigned gpio, int value)
	108	{
	109	/* GPIO can never have been requested or set as output */
	110	WARN_ON(1);
	111	}
	112
d8f388d8 DB	113	static inline int gpio_export(unsigned gpio, bool direction_may_change)
	114	{
	115	/* GPIO can never have been requested or set as {in,out}put */
	116	WARN_ON(1);
	117	return -EINVAL;
	118	}
	119
a4177ee7 JN	120	static inline int gpio_export_link(struct device dev, const char name,
	121	unsigned gpio)
	122	{
	123	/* GPIO can never have been exported */
	124	WARN_ON(1);
	125	return -EINVAL;
	126	}
	127
07697461 JN	128	static inline int gpio_sysfs_set_active_low(unsigned gpio, int value)
	129	{
	130	/* GPIO can never have been requested */
	131	WARN_ON(1);
	132	return -EINVAL;
	133	}
a4177ee7	134
d8f388d8 DB	135	static inline void gpio_unexport(unsigned gpio)
	136	{
	137	/* GPIO can never have been exported */
	138	WARN_ON(1);
	139	}
	140
7560fa60 DB	141	static inline int gpio_to_irq(unsigned gpio)
	142	{
	143	/* GPIO can never have been requested or set as input */
	144	WARN_ON(1);
	145	return -EINVAL;
	146	}
	147
	148	static inline int irq_to_gpio(unsigned irq)
	149	{
	150	/* irq can never have been returned from gpio_to_irq() */
	151	WARN_ON(1);
	152	return -EINVAL;
	153	}
	154
	155	#endif
	156
	157	#endif /* __LINUX_GPIO_H */