158 lines
3.0 KiB
C
158 lines
3.0 KiB
C
#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 __must_check gpio_request_one(unsigned gpio,
|
|
unsigned long flags, const char *label)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int __must_check 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 */
|