drivers/gpio/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
  11 #include <linux/err.h>
  12 #include <linux/types.h>
  13
  14 #include <linux/gpio/consumer.h>
  15
  16 struct device;
  17 struct fwnode_handle;
  18
  19 struct gpio_chip;
  20 struct gpio_desc;
  21 struct gpio_device;
  22
  23 #ifdef CONFIG_ACPI
  24 void acpi_gpiochip_add(struct gpio_chip *chip);
  25 void acpi_gpiochip_remove(struct gpio_chip *chip);
  26
  27 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
  28 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
  29
  30 struct 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
  36 int acpi_gpio_count(const struct fwnode_handle *fwnode, const char *con_id);
  37 #else
  38 static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
  39 static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
  40
  41 static inline void
  42 acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
  43
  44 static inline void
  45 acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
  46
  47 static inline struct gpio_desc *
  48 acpi_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 }
  54 static 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 */