linux/drivers/i2c/i2c-core.h
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   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
  22struct 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 */
  31extern struct rw_semaphore      __i2c_board_lock;
  32extern struct list_head __i2c_board_list;
  33extern int              __i2c_first_dynamic_bus_num;
  34
  35
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