drivers/i2c/i2c-core.h

   1 /*
   2  * i2c-core.h - interfaces internal to the I2C framework
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  17  * MA 02110-1301 USA.
  18  */
  19
  20 #include <linux/rwsem.h>
  21
  22 struct i2c_devinfo {
  23         struct list_head        list;
  24         int                     busnum;
  25         struct i2c_board_info   board_info;
  26 };
  27
  28 /* board_lock protects board_list and first_dynamic_bus_num.
  29  * only i2c core components are allowed to use these symbols.
  30  */
  31 extern struct rw_semaphore      __i2c_board_lock;
  32 extern struct list_head __i2c_board_list;
  33 extern int              __i2c_first_dynamic_bus_num;
  34