i2c-core.h 1.1 KB

12345678910111213141516171819202122232425262728293031323334
  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., 675 Mass Ave, Cambridge, MA 02139, USA.
  17. */
  18. #include <linux/rwsem.h>
  19. struct i2c_devinfo {
  20. struct list_head list;
  21. int busnum;
  22. struct i2c_board_info board_info;
  23. };
  24. /* board_lock protects board_list and first_dynamic_bus_num.
  25. * only i2c core components are allowed to use these symbols.
  26. */
  27. extern struct rw_semaphore __i2c_board_lock;
  28. extern struct list_head __i2c_board_list;
  29. extern int __i2c_first_dynamic_bus_num;