99 строки
2.7 KiB
C
99 строки
2.7 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
|
|
* @debounce: debounce timeout 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 debounce;
|
|
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 */
|