include/linux/of_gpio.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * OF helpers for the GPIO API
   4  *
   5  * Copyright (c) 2007-2008  MontaVista Software, Inc.
   6  *
   7  * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
   8  */
   9
  10 #ifndef __LINUX_OF_GPIO_H
  11 #define __LINUX_OF_GPIO_H
  12
  13 #include <linux/compiler.h>
  14 #include <linux/gpio/driver.h>
  15 #include <linux/gpio.h>         /* FIXME: Shouldn't be here */
  16 #include <linux/of.h>
  17
  18 struct device_node;
  19
  20 #ifdef CONFIG_OF_GPIO
  21
  22 extern int of_get_named_gpio(const struct device_node *np,
  23                              const char *list_name, int index);
  24
  25 #else /* CONFIG_OF_GPIO */
  26
  27 #include <linux/errno.h>
  28
  29 /* Drivers may not strictly depend on the GPIO support, so let them link. */
  30 static inline int of_get_named_gpio(const struct device_node *np,
  31                                    const char *propname, int index)
  32 {
  33         return -ENOSYS;
  34 }
  35
  36 #endif /* CONFIG_OF_GPIO */
  37
  38 #endif /* __LINUX_OF_GPIO_H */