Quelle gpio.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* NOTE: This header *must not* be included.
*
* This is the LEGACY GPIO bulk include file, including legacy APIs. It is
* used for GPIO drivers still referencing the global GPIO numberspace,
* and should not be included in new code.
*
* If you're implementing a GPIO driver, only include <linux/gpio/driver.h>
* If you're implementing a GPIO consumer, only include <linux/gpio/consumer.h>
*/
#ifndef __LINUX_GPIO_H
#define __LINUX_GPIO_H

#include <linux/types.h>
#ifdef CONFIG_GPIOLIB
#include <linux/gpio/consumer.h>
#endif

#ifdef CONFIG_GPIOLIB_LEGACY

struct device;

/* make these flag values available regardless of GPIO kconfig options */
#define GPIOF_IN  ((1 << 0))
#define GPIOF_OUT_INIT_LOW ((0 << 0) | (0 << 1))
#define GPIOF_OUT_INIT_HIGH ((0 << 0) | (1 << 1))

#ifdef CONFIG_GPIOLIB
/*
* "valid" GPIO numbers are nonnegative and may be passed to
* setup routines like gpio_request().  Only some valid numbers
* can successfully be requested and used.
*
* Invalid GPIO numbers are useful for indicating no-such-GPIO in
* platform data and other tables.
*/
static inline bool gpio_is_valid(int number)
{
/* only non-negative numbers are valid */
return number >= 0;
}

/*
* Platforms may implement their GPIO interface with library code,
* at a small performance cost for non-inlined operations and some
* extra memory (for code and for per-GPIO table entries).
*/

/* Always use the library code for GPIO management calls,
* or when sleeping may be involved.
*/
int gpio_request(unsigned gpio, const char *label);
void gpio_free(unsigned gpio);

static inline int gpio_direction_input(unsigned gpio)
{
return gpiod_direction_input(gpio_to_desc(gpio));
}
static inline int gpio_direction_output(unsigned gpio, int value)
{
return gpiod_direction_output_raw(gpio_to_desc(gpio), value);
}

static inline int gpio_get_value_cansleep(unsigned gpio)
{
return gpiod_get_raw_value_cansleep(gpio_to_desc(gpio));
}
static inline void gpio_set_value_cansleep(unsigned gpio, int value)
{
gpiod_set_raw_value_cansleep(gpio_to_desc(gpio), value);
}

static inline int gpio_get_value(unsigned gpio)
{
return gpiod_get_raw_value(gpio_to_desc(gpio));
}
static inline void gpio_set_value(unsigned gpio, int value)
{
gpiod_set_raw_value(gpio_to_desc(gpio), value);
}

static inline int gpio_to_irq(unsigned gpio)
{
return gpiod_to_irq(gpio_to_desc(gpio));
}

int gpio_request_one(unsigned gpio, unsigned long flags, const char *label);

int devm_gpio_request_one(struct device *dev, unsigned gpio,
     unsigned long flags, const char *label);

#else /* ! CONFIG_GPIOLIB */

#include <linux/kernel.h>

#include <asm/bug.h>
#include <asm/errno.h>

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 gpio_request_one(unsigned gpio,
     unsigned long flags, 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_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_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_to_irq(unsigned gpio)
{
/* GPIO can never have been requested or set as input */
WARN_ON(1);
return -EINVAL;
}

static inline int devm_gpio_request_one(struct device *dev, unsigned gpio,
     unsigned long flags, const char *label)
{
WARN_ON(1);
return -EINVAL;
}

#endif /* ! CONFIG_GPIOLIB */
#endif /* CONFIG_GPIOLIB_LEGACY */
#endif /* __LINUX_GPIO_H */

quality95%

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.