linux/drivers/gpio/gpiolib-acpi.h
Dmitry Torokhov 4f78d91c72 gpiolib: acpi: make acpi_can_fallback_to_crs() static
It is not used outside gpiolib-acpi.c module, so there is no need to
export it.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20190904172624.GA76617@dtor-ws
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-09-10 11:34:20 +01:00

97 lines
2.6 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* ACPI helpers for GPIO API
*
* Copyright (C) 2012,2019 Intel Corporation
*/
#ifndef GPIOLIB_ACPI_H
#define GPIOLIB_ACPI_H
struct acpi_device;
/**
* struct acpi_gpio_info - ACPI GPIO specific information
* @adev: reference to ACPI device which consumes GPIO resource
* @flags: GPIO initialization flags
* @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
* @pin_config: pin bias as provided by ACPI
* @polarity: interrupt polarity as provided by ACPI
* @triggering: triggering type as provided by ACPI
* @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping
*/
struct acpi_gpio_info {
struct acpi_device *adev;
enum gpiod_flags flags;
bool gpioint;
int pin_config;
int polarity;
int triggering;
unsigned int quirks;
};
#ifdef CONFIG_ACPI
void acpi_gpiochip_add(struct gpio_chip *chip);
void acpi_gpiochip_remove(struct gpio_chip *chip);
void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
struct acpi_gpio_info *info);
int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
struct acpi_gpio_info *info);
struct gpio_desc *acpi_find_gpio(struct device *dev,
const char *con_id,
unsigned int idx,
enum gpiod_flags *dflags,
unsigned long *lookupflags);
struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
const char *propname, int index,
struct acpi_gpio_info *info);
int acpi_gpio_count(struct device *dev, const char *con_id);
#else
static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
static inline void
acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
static inline void
acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
static inline int
acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)
{
return 0;
}
static inline int
acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
struct acpi_gpio_info *info)
{
return 0;
}
static inline struct gpio_desc *
acpi_find_gpio(struct device *dev, const char *con_id,
unsigned int idx, enum gpiod_flags *dflags,
unsigned long *lookupflags)
{
return ERR_PTR(-ENOENT);
}
static inline struct gpio_desc *
acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
int index, struct acpi_gpio_info *info)
{
return ERR_PTR(-ENXIO);
}
static inline int acpi_gpio_count(struct device *dev, const char *con_id)
{
return -ENODEV;
}
#endif
#endif /* GPIOLIB_ACPI_H */