include/linux/of_i2c.h

   1 /*
   2  * Generic I2C API implementation for PowerPC.
   3  *
   4  * Copyright (c) 2008 Jochen Friedrich <jochen@scram.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #ifndef __LINUX_OF_I2C_H
  13 #define __LINUX_OF_I2C_H
  14
  15 #if defined(CONFIG_OF_I2C) || defined(CONFIG_OF_I2C_MODULE)
  16 #include <linux/i2c.h>
  17
  18 extern void of_i2c_register_devices(struct i2c_adapter *adap);
  19
  20 /* must call put_device() when done with returned i2c_client device */
  21 extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
  22
  23 /* must call put_device() when done with returned i2c_adapter device */
  24 extern struct i2c_adapter *of_find_i2c_adapter_by_node(
  25                                                 struct device_node *node);
  26
  27 #else
  28 static inline void of_i2c_register_devices(struct i2c_adapter *adap)
  29 {
  30         return;
  31 }
  32
  33 static inline struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
  34 {
  35         return NULL;
  36 }
  37
  38 /* must call put_device() when done with returned i2c_adapter device */
  39 static inline struct i2c_adapter *of_find_i2c_adapter_by_node(
  40                                                 struct device_node *node)
  41 {
  42         return NULL;
  43 }
  44 #endif /* CONFIG_OF_I2C */
  45
  46 #endif /* __LINUX_OF_I2C_H */