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linux-arkmicro
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linux
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drivers
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i2c
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i2c-core.h

i2c-core.h 2.1 KB
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  1. /*
    2. 

  2.  * i2c-core.h - interfaces internal to the I2C framework
    3. 

  3.  *
    4. 

  4.  * This program is free software; you can redistribute it and/or modify
    5. 

  5.  * it under the terms of the GNU General Public License as published by
    6. 

  6.  * the Free Software Foundation; either version 2 of the License, or
    7. 

  7.  * (at your option) any later version.
    8. 

  8.  *
    9. 

  9.  * This program is distributed in the hope that it will be useful,
    10. 

  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11. 

  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12. 

  12.  * GNU General Public License for more details.
    13. 

  13.  */
    14. 

  14. 

  15. #include <linux/rwsem.h>
    16. 

  16. 

  17. struct i2c_devinfo {
    18. 

  18. 	struct list_head	list;
    19. 

  19. 	int			busnum;
    20. 

  20. 	struct i2c_board_info	board_info;
    21. 

  21. };
    22. 

  22. 

  23. /* board_lock protects board_list and first_dynamic_bus_num.
    24. 

  24.  * only i2c core components are allowed to use these symbols.
    25. 

  25.  */
    26. 

  26. extern struct rw_semaphore	__i2c_board_lock;
    27. 

  27. extern struct list_head	__i2c_board_list;
    28. 

  28. extern int		__i2c_first_dynamic_bus_num;
    29. 

  29. 

  30. int i2c_check_7bit_addr_validity_strict(unsigned short addr);
    31. 

  31. 

  32. #ifdef CONFIG_ACPI
    33. 

  33. const struct acpi_device_id *
    34. 

  34. i2c_acpi_match_device(const struct acpi_device_id *matches,
    35. 

  35. 		      struct i2c_client *client);
    36. 

  36. void i2c_acpi_register_devices(struct i2c_adapter *adap);
    37. 

  37. #else /* CONFIG_ACPI */
    38. 

  38. static inline void i2c_acpi_register_devices(struct i2c_adapter *adap) { }
    39. 

  39. static inline const struct acpi_device_id *
    40. 

  40. i2c_acpi_match_device(const struct acpi_device_id *matches,
    41. 

  41. 		      struct i2c_client *client)
    42. 

  42. {
    43. 

  43. 	return NULL;
    44. 

  44. }
    45. 

  45. #endif /* CONFIG_ACPI */
    46. 

  46. extern struct notifier_block i2c_acpi_notifier;
    47. 

  47. 

  48. #ifdef CONFIG_ACPI_I2C_OPREGION
    49. 

  49. int i2c_acpi_install_space_handler(struct i2c_adapter *adapter);
    50. 

  50. void i2c_acpi_remove_space_handler(struct i2c_adapter *adapter);
    51. 

  51. #else /* CONFIG_ACPI_I2C_OPREGION */
    52. 

  52. static inline int i2c_acpi_install_space_handler(struct i2c_adapter *adapter) { return 0; }
    53. 

  53. static inline void i2c_acpi_remove_space_handler(struct i2c_adapter *adapter) { }
    54. 

  54. #endif /* CONFIG_ACPI_I2C_OPREGION */
    55. 

  55. 

  56. #ifdef CONFIG_OF
    57. 

  57. void of_i2c_register_devices(struct i2c_adapter *adap);
    58. 

  58. #else
    59. 

  59. static inline void of_i2c_register_devices(struct i2c_adapter *adap) { }
    60. 

  60. #endif
    61. 

  61. extern struct notifier_block i2c_of_notifier;
    62.