i2c-core.h 950 B

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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. #include <linux/rwsem.h>
  15. struct i2c_devinfo {
  16. struct list_head list;
  17. int busnum;
  18. struct i2c_board_info board_info;
  19. };
  20. /* board_lock protects board_list and first_dynamic_bus_num.
  21. * only i2c core components are allowed to use these symbols.
  22. */
  23. extern struct rw_semaphore __i2c_board_lock;
  24. extern struct list_head __i2c_board_list;
  25. extern int __i2c_first_dynamic_bus_num;