1 /* SPDX-License-Identifier: GPL-2.0 */
3 * ACPI helpers for GPIO API
5 * Copyright (C) 2012,2019 Intel Corporation
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
25 struct acpi_gpio_info {
26 struct acpi_device *adev;
27 enum gpiod_flags flags;
33 unsigned int debounce;
38 void acpi_gpiochip_add(struct gpio_chip *chip);
39 void acpi_gpiochip_remove(struct gpio_chip *chip);
41 void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev);
43 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
44 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
46 int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
47 struct acpi_gpio_info *info);
48 int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
49 struct acpi_gpio_info *info);
51 struct gpio_desc *acpi_find_gpio(struct device *dev,
54 enum gpiod_flags *dflags,
55 unsigned long *lookupflags);
56 struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
57 const char *propname, int index,
58 struct acpi_gpio_info *info);
60 int acpi_gpio_count(struct device *dev, const char *con_id);
62 static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
63 static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
65 static inline void acpi_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev) { }
68 acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
71 acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
74 acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)
79 acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
80 struct acpi_gpio_info *info)
85 static inline struct gpio_desc *
86 acpi_find_gpio(struct device *dev, const char *con_id,
87 unsigned int idx, enum gpiod_flags *dflags,
88 unsigned long *lookupflags)
90 return ERR_PTR(-ENOENT);
92 static inline struct gpio_desc *
93 acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
94 int index, struct acpi_gpio_info *info)
96 return ERR_PTR(-ENXIO);
98 static inline int acpi_gpio_count(struct device *dev, const char *con_id)
104 #endif /* GPIOLIB_ACPI_H */