include/linux/acpi_gpio.h

   1 #ifndef _LINUX_ACPI_GPIO_H_
   2 #define _LINUX_ACPI_GPIO_H_
   3
   4 #include <linux/device.h>
   5 #include <linux/err.h>
   6 #include <linux/errno.h>
   7 #include <linux/gpio.h>
   8 #include <linux/gpio/consumer.h>
   9
  10 /**
  11  * struct acpi_gpio_info - ACPI GPIO specific information
  12  * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
  13  * @active_low: in case of @gpioint, the pin is active low
  14  */
  15 struct acpi_gpio_info {
  16         bool gpioint;
  17         bool active_low;
  18 };
  19
  20 #ifdef CONFIG_GPIO_ACPI
  21
  22 struct gpio_desc *acpi_get_gpiod_by_index(struct device *dev, int index,
  23                                           struct acpi_gpio_info *info);
  24 void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
  25 void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
  26
  27 #else /* CONFIG_GPIO_ACPI */
  28
  29 static inline struct gpio_desc *
  30 acpi_get_gpiod_by_index(struct device *dev, int index,
  31                         struct acpi_gpio_info *info)
  32 {
  33         return ERR_PTR(-ENOSYS);
  34 }
  35
  36 static inline void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
  37 static inline void acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
  38
  39 #endif /* CONFIG_GPIO_ACPI */
  40
  41 static inline int acpi_get_gpio_by_index(struct device *dev, int index,
  42                                          struct acpi_gpio_info *info)
  43 {
  44         struct gpio_desc *desc = acpi_get_gpiod_by_index(dev, index, info);
  45
  46         if (IS_ERR(desc))
  47                 return PTR_ERR(desc);
  48         return desc_to_gpio(desc);
  49 }
  50
  51 #endif /* _LINUX_ACPI_GPIO_H_ */