drivers/gpio/gpiolib-of.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef GPIOLIB_OF_H
   4 #define GPIOLIB_OF_H
   5
   6 #include <linux/err.h>
   7 #include <linux/types.h>
   8
   9 #include <linux/notifier.h>
  10
  11 struct device;
  12 struct fwnode_handle;
  13
  14 struct gpio_chip;
  15 struct gpio_desc;
  16 struct gpio_device;
  17
  18 #ifdef CONFIG_OF_GPIO
  19 struct gpio_desc *of_find_gpio(struct device_node *np,
  20                                const char *con_id,
  21                                unsigned int idx,
  22                                unsigned long *lookupflags);
  23 int of_gpiochip_add(struct gpio_chip *gc);
  24 void of_gpiochip_remove(struct gpio_chip *gc);
  25 int of_gpio_count(const struct fwnode_handle *fwnode, const char *con_id);
  26 #else
  27 static inline struct gpio_desc *of_find_gpio(struct device_node *np,
  28                                              const char *con_id,
  29                                              unsigned int idx,
  30                                              unsigned long *lookupflags)
  31 {
  32         return ERR_PTR(-ENOENT);
  33 }
  34 static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; }
  35 static inline void of_gpiochip_remove(struct gpio_chip *gc) { }
  36 static inline int of_gpio_count(const struct fwnode_handle *fwnode,
  37                                 const char *con_id)
  38 {
  39         return 0;
  40 }
  41 #endif /* CONFIG_OF_GPIO */
  42
  43 extern struct notifier_block gpio_of_notifier;
  44
  45 #endif /* GPIOLIB_OF_H */