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