mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
046e14afb3
Inclusion of kernel.h increases the mess with the header dependencies. Avoid kernel.h inclusion where it's possible. Besides that, clean up a bit other inclusions inside GPIO subsystem headers. It includes: - removal pin control bits (forward declaration and header) from linux/gpio.h - removal of.h from asm-generic/gpio.h - use of explicit headers in gpio/consumer.h - add FIXME note with regard to gpio.h inclusion in of_gpio,h Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20200205134336.20197-1-andriy.shevchenko@linux.intel.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_GENERIC_GPIO_H
|
|
#define _ASM_GENERIC_GPIO_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
|
|
#ifdef CONFIG_GPIOLIB
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/gpio/driver.h>
|
|
#include <linux/gpio/consumer.h>
|
|
|
|
/* 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).
|
|
*
|
|
* While the GPIO programming interface defines valid GPIO numbers
|
|
* to be in the range 0..MAX_INT, this library restricts them to the
|
|
* smaller range 0..ARCH_NR_GPIOS-1.
|
|
*
|
|
* ARCH_NR_GPIOS is somewhat arbitrary; it usually reflects the sum of
|
|
* builtin/SoC GPIOs plus a number of GPIOs on expanders; the latter is
|
|
* actually an estimate of a board-specific value.
|
|
*/
|
|
|
|
#ifndef ARCH_NR_GPIOS
|
|
#if defined(CONFIG_ARCH_NR_GPIO) && CONFIG_ARCH_NR_GPIO > 0
|
|
#define ARCH_NR_GPIOS CONFIG_ARCH_NR_GPIO
|
|
#else
|
|
#define ARCH_NR_GPIOS 512
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* "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)
|
|
{
|
|
return number >= 0 && number < ARCH_NR_GPIOS;
|
|
}
|
|
|
|
struct device;
|
|
struct gpio;
|
|
struct seq_file;
|
|
struct module;
|
|
struct device_node;
|
|
struct gpio_desc;
|
|
|
|
/* caller holds gpio_lock *OR* gpio is marked as requested */
|
|
static inline struct gpio_chip *gpio_to_chip(unsigned gpio)
|
|
{
|
|
return gpiod_to_chip(gpio_to_desc(gpio));
|
|
}
|
|
|
|
/* Always use the library code for GPIO management calls,
|
|
* or when sleeping may be involved.
|
|
*/
|
|
extern int gpio_request(unsigned gpio, const char *label);
|
|
extern 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_set_debounce(unsigned gpio, unsigned debounce)
|
|
{
|
|
return gpiod_set_debounce(gpio_to_desc(gpio), debounce);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
|
|
/* A platform's <asm/gpio.h> code may want to inline the I/O calls when
|
|
* the GPIO is constant and refers to some always-present controller,
|
|
* giving direct access to chip registers and tight bitbanging loops.
|
|
*/
|
|
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_cansleep(unsigned gpio)
|
|
{
|
|
return gpiod_cansleep(gpio_to_desc(gpio));
|
|
}
|
|
|
|
static inline int __gpio_to_irq(unsigned gpio)
|
|
{
|
|
return gpiod_to_irq(gpio_to_desc(gpio));
|
|
}
|
|
|
|
extern int gpio_request_one(unsigned gpio, unsigned long flags, const char *label);
|
|
extern int gpio_request_array(const struct gpio *array, size_t num);
|
|
extern void gpio_free_array(const struct gpio *array, size_t num);
|
|
|
|
/*
|
|
* A sysfs interface can be exported by individual drivers if they want,
|
|
* but more typically is configured entirely from userspace.
|
|
*/
|
|
static inline int gpio_export(unsigned gpio, bool direction_may_change)
|
|
{
|
|
return gpiod_export(gpio_to_desc(gpio), direction_may_change);
|
|
}
|
|
|
|
static inline int gpio_export_link(struct device *dev, const char *name,
|
|
unsigned gpio)
|
|
{
|
|
return gpiod_export_link(dev, name, gpio_to_desc(gpio));
|
|
}
|
|
|
|
static inline void gpio_unexport(unsigned gpio)
|
|
{
|
|
gpiod_unexport(gpio_to_desc(gpio));
|
|
}
|
|
|
|
#else /* !CONFIG_GPIOLIB */
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
static inline bool gpio_is_valid(int number)
|
|
{
|
|
/* only non-negative numbers are valid */
|
|
return number >= 0;
|
|
}
|
|
|
|
/* platforms that don't directly support access to GPIOs through I2C, SPI,
|
|
* or other blocking infrastructure can use these wrappers.
|
|
*/
|
|
|
|
static inline int gpio_cansleep(unsigned gpio)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int gpio_get_value_cansleep(unsigned gpio)
|
|
{
|
|
might_sleep();
|
|
return __gpio_get_value(gpio);
|
|
}
|
|
|
|
static inline void gpio_set_value_cansleep(unsigned gpio, int value)
|
|
{
|
|
might_sleep();
|
|
__gpio_set_value(gpio, value);
|
|
}
|
|
|
|
#endif /* !CONFIG_GPIOLIB */
|
|
|
|
#endif /* _ASM_GENERIC_GPIO_H */
|