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 * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping
23 struct acpi_gpio_info {
24 struct acpi_device *adev;
25 enum gpiod_flags flags;
34 void acpi_gpiochip_add(struct gpio_chip *chip);
35 void acpi_gpiochip_remove(struct gpio_chip *chip);
37 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
38 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
40 int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
41 struct acpi_gpio_info *info);
42 int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
43 struct acpi_gpio_info *info);
45 struct gpio_desc *acpi_find_gpio(struct device *dev,
48 enum gpiod_flags *dflags,
49 unsigned long *lookupflags);
50 struct gpio_desc *acpi_node_get_gpiod(struct fwnode_handle *fwnode,
51 const char *propname, int index,
52 struct acpi_gpio_info *info);
54 int acpi_gpio_count(struct device *dev, const char *con_id);
56 static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
57 static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
60 acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
63 acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
66 acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)
71 acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags,
72 struct acpi_gpio_info *info)
77 static inline struct gpio_desc *
78 acpi_find_gpio(struct device *dev, const char *con_id,
79 unsigned int idx, enum gpiod_flags *dflags,
80 unsigned long *lookupflags)
82 return ERR_PTR(-ENOENT);
84 static inline struct gpio_desc *
85 acpi_node_get_gpiod(struct fwnode_handle *fwnode, const char *propname,
86 int index, struct acpi_gpio_info *info)
88 return ERR_PTR(-ENXIO);
90 static inline int acpi_gpio_count(struct device *dev, const char *con_id)
96 #endif /* GPIOLIB_ACPI_H */