f567fde246
The bit 2 and 3 in GPIO flag are allocated for the flag OPEN_DRAIN/OPEN_SOURCE. These bits are reused for the flag EXPORT/EXPORT_CHANGEABLE and so creating conflict. Fix this conflict by assigning bit 4 and 5 for the flag EXPORT/EXPORT_CHANGEABLE. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
236 lines
4.6 KiB
C
236 lines
4.6 KiB
C
#ifndef __LINUX_GPIO_H
|
|
#define __LINUX_GPIO_H
|
|
|
|
#include <linux/errno.h>
|
|
|
|
/* see Documentation/gpio.txt */
|
|
|
|
/* make these flag values available regardless of GPIO kconfig options */
|
|
#define GPIOF_DIR_OUT (0 << 0)
|
|
#define GPIOF_DIR_IN (1 << 0)
|
|
|
|
#define GPIOF_INIT_LOW (0 << 1)
|
|
#define GPIOF_INIT_HIGH (1 << 1)
|
|
|
|
#define GPIOF_IN (GPIOF_DIR_IN)
|
|
#define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW)
|
|
#define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH)
|
|
|
|
/* Gpio pin is open drain */
|
|
#define GPIOF_OPEN_DRAIN (1 << 2)
|
|
|
|
/* Gpio pin is open source */
|
|
#define GPIOF_OPEN_SOURCE (1 << 3)
|
|
|
|
#define GPIOF_EXPORT (1 << 4)
|
|
#define GPIOF_EXPORT_CHANGEABLE (1 << 5)
|
|
#define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT)
|
|
#define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)
|
|
|
|
/**
|
|
* struct gpio - a structure describing a GPIO with configuration
|
|
* @gpio: the GPIO number
|
|
* @flags: GPIO configuration as specified by GPIOF_*
|
|
* @label: a literal description string of this GPIO
|
|
*/
|
|
struct gpio {
|
|
unsigned gpio;
|
|
unsigned long flags;
|
|
const char *label;
|
|
};
|
|
|
|
#ifdef CONFIG_GENERIC_GPIO
|
|
|
|
#ifdef CONFIG_ARCH_HAVE_CUSTOM_GPIO_H
|
|
#include <asm/gpio.h>
|
|
#else
|
|
|
|
#include <asm-generic/gpio.h>
|
|
|
|
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);
|
|
}
|
|
|
|
static inline int gpio_to_irq(unsigned int gpio)
|
|
{
|
|
return __gpio_to_irq(gpio);
|
|
}
|
|
|
|
static inline int irq_to_gpio(unsigned int irq)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
#endif
|
|
|
|
#else
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/bug.h>
|
|
|
|
struct device;
|
|
struct gpio_chip;
|
|
|
|
static inline bool gpio_is_valid(int number)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int gpio_request(unsigned gpio, const char *label)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int devm_gpio_request(struct device *dev, 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 devm_gpio_request_one(struct device *dev, unsigned gpio,
|
|
unsigned long flags, const char *label)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int gpio_request_array(const 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 devm_gpio_free(struct device *dev, unsigned gpio)
|
|
{
|
|
might_sleep();
|
|
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline void gpio_free_array(const 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 */
|