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98 lines
2.7 KiB
98 lines
2.7 KiB
/* 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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* @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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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_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 |
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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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