mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Andy Shevchenko](/assets/img/avatar_default.png)
There is not a single user in the entire kernel of this deprecated API, kill it for good. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
229 lines
5.4 KiB
C
229 lines
5.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* <linux/gpio.h>
|
|
*
|
|
* 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>
|
|
|
|
struct device;
|
|
|
|
/* see Documentation/driver-api/gpio/legacy.rst */
|
|
|
|
/* 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 active-low */
|
|
#define GPIOF_ACTIVE_LOW (1 << 2)
|
|
|
|
/**
|
|
* 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_GPIOLIB
|
|
|
|
#include <linux/gpio/consumer.h>
|
|
|
|
/*
|
|
* "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).
|
|
*/
|
|
|
|
/*
|
|
* At the end we want all GPIOs to be dynamically allocated from 0.
|
|
* However, some legacy drivers still perform fixed allocation.
|
|
* Until they are all fixed, leave 0-512 space for them.
|
|
*/
|
|
#define GPIO_DYNAMIC_BASE 512
|
|
|
|
/* 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)
|
|
{
|
|
return 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)
|
|
{
|
|
return 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 gpio_request_array(const struct gpio *array, size_t num);
|
|
void gpio_free_array(const struct gpio *array, size_t num);
|
|
|
|
/* CONFIG_GPIOLIB: bindings for managed devices that want to request gpios */
|
|
|
|
int devm_gpio_request(struct device *dev, unsigned gpio, 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 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 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_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(struct device *dev, unsigned gpio,
|
|
const char *label)
|
|
{
|
|
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 /* __LINUX_GPIO_H */
|