projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 77cb907a AS |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* | |
| 3 | * ACPI helpers for GPIO API | |
| 4 | * | |
| 5 | * Copyright (C) 2012,2019 Intel Corporation | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef GPIOLIB_ACPI_H | |
| 9 | #define GPIOLIB_ACPI_H | |
| 10 | ||
| 11 | struct acpi_device; | |
| 12 | ||
| 13 | /** | |
| 14 | * struct acpi_gpio_info - ACPI GPIO specific information | |
| 15 | * @adev: reference to ACPI device which consumes GPIO resource | |
| 16 | * @flags: GPIO initialization flags | |
| 17 | * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo | |
| 18 | * @pin_config: pin bias as provided by ACPI | |
| 19 | * @polarity: interrupt polarity as provided by ACPI | |
| 20 | * @triggering: triggering type as provided by ACPI | |
| 21 | * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping | |
| 22 | */ | |
| 23 | struct acpi_gpio_info { | |
| 24 | struct acpi_device *adev; | |
| 25 | enum gpiod_flags flags; | |
| 26 | bool gpioint; | |
| 27 | int pin_config; | |
| 28 | int polarity; | |
| 29 | int triggering; | |
| 30 | unsigned int quirks; | |
| 31 | }; | |
| 32 | ||
| 33 | #ifdef CONFIG_ACPI | |
| 34 | void acpi_gpiochip_add(struct gpio_chip *chip); | |
| 35 | void acpi_gpiochip_remove(struct gpio_chip *chip); | |
| 36 | ||
| 37 | void acpi_gpiochip_request_interrupts(struct gpio_chip *chip); | |
| 38 | void acpi_gpiochip_free_interrupts(struct gpio_chip *chip); | |
| 39 | ||
| 40 | int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, | |
| 41 | struct acpi_gpio_info *info); | |
| 42 | int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags, | |
| 43 | struct acpi_gpio_info *info); | |
| 44 | ||
| 45 | struct gpio_desc *acpi_find_gpio(struct device *dev, | |
| 46 | const char *con_id, | |
| 47 | unsigned int idx, | |
| 48 | enum gpiod_flags *dflags, | |
| 49 | unsigned long *lookupflags); | |
| 50 | struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode, | |
| 51 | const char *propname, int index, | |
| 52 | struct acpi_gpio_info *info); | |
| 53 | ||
| 54 | int acpi_gpio_count(struct device *dev, const char *con_id); | |
| 77cb907a AS |
55 | #else |
| 56 | static inline void acpi_gpiochip_add(struct gpio_chip *chip) { } | |
| 57 | static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { } | |
| 58 | ||
| 59 | static inline void | |
| 60 | acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { } | |
| 61 | ||
| 62 | static inline void | |
| 63 | acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { } | |
| 64 | ||
| 65 | static inline int | |
| 66 | acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info) | |
| 67 | { | |
| 68 | return 0; | |
| 69 | } | |
| 70 | static inline int | |
| 71 | acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags, | |
| 72 | struct acpi_gpio_info *info) | |
| 73 | { | |
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | static inline struct gpio_desc * | |
| 78 | acpi_find_gpio(struct device *dev, const char *con_id, | |
| 79 | unsigned int idx, enum gpiod_flags *dflags, | |
| 80 | unsigned long *lookupflags) | |
| 81 | { | |
| 82 | return ERR_PTR(-ENOENT); | |
| 83 | } | |
| 84 | static inline struct gpio_desc * | |
| 85 | acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname, | |
| 86 | int index, struct acpi_gpio_info *info) | |
| 87 | { | |
| 88 | return ERR_PTR(-ENXIO); | |
| 89 | } | |
| 90 | static inline int acpi_gpio_count(struct device *dev, const char *con_id) | |
| 91 | { | |
| 92 | return -ENODEV; | |
| 93 | } | |
| 77cb907a AS |
94 | #endif |
| 95 | ||
| 96 | #endif /* GPIOLIB_ACPI_H */ |