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Linux kernel mirror (for testing)
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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
11struct 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 * @debounce: debounce timeout as provided by ACPI
22 * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping
23 */
24struct acpi_gpio_info {
25 struct acpi_device *adev;
26 enum gpiod_flags flags;
27 bool gpioint;
28 int pin_config;
29 int polarity;
30 int triggering;
31 unsigned int debounce;
32 unsigned int quirks;
33};
34
35#ifdef CONFIG_ACPI
36void acpi_gpiochip_add(struct gpio_chip *chip);
37void acpi_gpiochip_remove(struct gpio_chip *chip);
38
39void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
40void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
41
42int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
43 struct acpi_gpio_info *info);
44int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
45 struct acpi_gpio_info *info);
46
47struct gpio_desc *acpi_find_gpio(struct device *dev,
48 const char *con_id,
49 unsigned int idx,
50 enum gpiod_flags *dflags,
51 unsigned long *lookupflags);
52struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
53 const char *propname, int index,
54 struct acpi_gpio_info *info);
55
56int acpi_gpio_count(struct device *dev, const char *con_id);
57#else
58static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
59static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
60
61static inline void
62acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
63
64static inline void
65acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
66
67static inline int
68acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)
69{
70 return 0;
71}
72static inline int
73acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
74 struct acpi_gpio_info *info)
75{
76 return 0;
77}
78
79static inline struct gpio_desc *
80acpi_find_gpio(struct device *dev, const char *con_id,
81 unsigned int idx, enum gpiod_flags *dflags,
82 unsigned long *lookupflags)
83{
84 return ERR_PTR(-ENOENT);
85}
86static inline struct gpio_desc *
87acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
88 int index, struct acpi_gpio_info *info)
89{
90 return ERR_PTR(-ENXIO);
91}
92static inline int acpi_gpio_count(struct device *dev, const char *con_id)
93{
94 return -ENODEV;
95}
96#endif
97
98#endif /* GPIOLIB_ACPI_H */