mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
515321acb5
In the ACPI case we may use the firmware node in the similar way as it's done for OF case. We may use that fwnode for other purposes in the future. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
102 lines
2.9 KiB
C
102 lines
2.9 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_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev);
|
|
|
|
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_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev) { }
|
|
|
|
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 */
|