| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * ACPI helpers for GPIO API |
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| 4 | * |
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| 5 | * Copyright (C) 2012,2019 Intel Corporation |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef GPIOLIB_ACPI_H |
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| 9 | #define GPIOLIB_ACPI_H |
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| 10 | |
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| 11 | #include <linux/err.h> |
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| 12 | #include <linux/types.h> |
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| 13 | |
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| 14 | #include <linux/gpio/consumer.h> |
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| 15 | |
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| 16 | struct device; |
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| 17 | struct fwnode_handle; |
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| 18 | |
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| 19 | struct gpio_chip; |
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| 20 | struct gpio_desc; |
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| 21 | struct gpio_device; |
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| 22 | |
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| 23 | #ifdef CONFIG_ACPI |
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| 24 | void acpi_gpiochip_add(struct gpio_chip *chip); |
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| 25 | void acpi_gpiochip_remove(struct gpio_chip *chip); |
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| 26 | |
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| 27 | void acpi_gpiochip_request_interrupts(struct gpio_chip *chip); |
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| 28 | void acpi_gpiochip_free_interrupts(struct gpio_chip *chip); |
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| 29 | |
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| 30 | struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode, |
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| 31 | const char *con_id, |
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| 32 | unsigned int idx, |
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| 33 | enum gpiod_flags *dflags, |
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| 34 | unsigned long *lookupflags); |
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| 35 | |
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| 36 | int acpi_gpio_count(const struct fwnode_handle *fwnode, const char *con_id); |
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| 37 | #else |
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| 38 | static inline void acpi_gpiochip_add(struct gpio_chip *chip) { } |
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| 39 | static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { } |
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| 40 | |
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| 41 | static inline void |
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| 42 | acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { } |
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| 43 | |
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| 44 | static inline void |
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| 45 | acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { } |
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| 46 | |
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| 47 | static inline struct gpio_desc * |
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| 48 | acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, |
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| 49 | unsigned int idx, enum gpiod_flags *dflags, |
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| 50 | unsigned long *lookupflags) |
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| 51 | { |
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| 52 | return ERR_PTR(-ENOENT); |
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| 53 | } |
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| 54 | static inline int acpi_gpio_count(const struct fwnode_handle *fwnode, |
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| 55 | const char *con_id) |
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| 56 | { |
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| 57 | return -ENODEV; |
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| 58 | } |
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| 59 | #endif |
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| 60 | |
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| 61 | #endif /* GPIOLIB_ACPI_H */ |
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| 62 | |
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