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#include <linux/err.h>
12#include <linux/types.h>
13
14#include <linux/gpio/consumer.h>
15
16struct device;
17struct fwnode_handle;
18
19struct gpio_chip;
20struct gpio_desc;
21struct gpio_device;
 
 
 
 
 
 
 
 
 
 
 
 
 
22
23#ifdef CONFIG_ACPI
24void acpi_gpiochip_add(struct gpio_chip *chip);
25void acpi_gpiochip_remove(struct gpio_chip *chip);
26
 
 
27void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
28void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
29
30struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
 
 
 
 
 
31				 const char *con_id,
32				 unsigned int idx,
33				 enum gpiod_flags *dflags,
34				 unsigned long *lookupflags);
 
 
 
35
36int acpi_gpio_count(const struct fwnode_handle *fwnode, const char *con_id);
37#else
38static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
39static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
40
 
 
41static inline void
42acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
43
44static inline void
45acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
46
 
 
 
 
 
 
 
 
 
 
 
 
47static inline struct gpio_desc *
48acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id,
49	       unsigned int idx, enum gpiod_flags *dflags,
50	       unsigned long *lookupflags)
51{
52	return ERR_PTR(-ENOENT);
53}
54static inline int acpi_gpio_count(const struct fwnode_handle *fwnode,
55				  const char *con_id)
 
 
 
 
 
56{
57	return -ENODEV;
58}
59#endif
60
61#endif /* GPIOLIB_ACPI_H */

  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_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev);
 40
 41void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
 42void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
 43
 44int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
 45				 struct acpi_gpio_info *info);
 46int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
 47					struct acpi_gpio_info *info);
 48
 49struct gpio_desc *acpi_find_gpio(struct device *dev,
 50				 const char *con_id,
 51				 unsigned int idx,
 52				 enum gpiod_flags *dflags,
 53				 unsigned long *lookupflags);
 54struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
 55				      const char *propname, int index,
 56				      struct acpi_gpio_info *info);
 57
 58int acpi_gpio_count(struct device *dev, const char *con_id);
 59#else
 60static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
 61static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
 62
 63static inline void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev) { }
 64
 65static inline void
 66acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
 67
 68static inline void
 69acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
 70
 71static inline int
 72acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)
 73{
 74	return 0;
 75}
 76static inline int
 77acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
 78				    struct acpi_gpio_info *info)
 79{
 80	return 0;
 81}
 82
 83static inline struct gpio_desc *
 84acpi_find_gpio(struct device *dev, const char *con_id,
 85	       unsigned int idx, enum gpiod_flags *dflags,
 86	       unsigned long *lookupflags)
 87{
 88	return ERR_PTR(-ENOENT);
 89}
 90static inline struct gpio_desc *
 91acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
 92		    int index, struct acpi_gpio_info *info)
 93{
 94	return ERR_PTR(-ENXIO);
 95}
 96static inline int acpi_gpio_count(struct device *dev, const char *con_id)
 97{
 98	return -ENODEV;
 99}
100#endif
101
102#endif /* GPIOLIB_ACPI_H */