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kernel/linux-rt-4.4.41/drivers/i2c/i2c-core.h 950 Bytes
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  /*
   * i2c-core.h - interfaces internal to the I2C framework
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   */
  
  #include <linux/rwsem.h>
  
  struct i2c_devinfo {
  	struct list_head	list;
  	int			busnum;
  	struct i2c_board_info	board_info;
  };
  
  /* board_lock protects board_list and first_dynamic_bus_num.
   * only i2c core components are allowed to use these symbols.
   */
  extern struct rw_semaphore	__i2c_board_lock;
  extern struct list_head	__i2c_board_list;
  extern int		__i2c_first_dynamic_bus_num;