tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 * @wake_capable: wake capability as provided by ACPI
22 * @debounce: debounce timeout as provided by ACPI
23 * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping
24 */
25struct acpi_gpio_info {
26 struct acpi_device *adev;
27 enum gpiod_flags flags;
28 bool gpioint;
29 int pin_config;
30 int polarity;
31 int triggering;
32 bool wake_capable;
33 unsigned int debounce;
34 unsigned int quirks;
35};
36
37#ifdef CONFIG_ACPI
38void acpi_gpiochip_add(struct gpio_chip *chip);
39void acpi_gpiochip_remove(struct gpio_chip *chip);
40
41void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev);
42
43void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
44void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
45
46int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
47 struct acpi_gpio_info *info);
48int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
49 struct acpi_gpio_info *info);
50
51struct gpio_desc *acpi_find_gpio(struct device *dev,
52 const char *con_id,
53 unsigned int idx,
54 enum gpiod_flags *dflags,
55 unsigned long *lookupflags);
56struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
57 const char *propname, int index,
58 struct acpi_gpio_info *info);
59
60int acpi_gpio_count(struct device *dev, const char *con_id);
61#else
62static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
63static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
64
65static inline void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev) { }
66
67static inline void
68acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
69
70static inline void
71acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
72
73static inline int
74acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)
75{
76 return 0;
77}
78static inline int
79acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
80 struct acpi_gpio_info *info)
81{
82 return 0;
83}
84
85static inline struct gpio_desc *
86acpi_find_gpio(struct device *dev, const char *con_id,
87 unsigned int idx, enum gpiod_flags *dflags,
88 unsigned long *lookupflags)
89{
90 return ERR_PTR(-ENOENT);
91}
92static inline struct gpio_desc *
93acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
94 int index, struct acpi_gpio_info *info)
95{
96 return ERR_PTR(-ENXIO);
97}
98static inline int acpi_gpio_count(struct device *dev, const char *con_id)
99{
100 return -ENODEV;
101}
102#endif
103
104#endif /* GPIOLIB_ACPI_H */