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max1668

max1668 2.3 KB
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  1. Kernel driver max1668
    2. 

  2. =====================
    3. 

  3. 

  4. Supported chips:
    5. 

  5.   * Maxim MAX1668, MAX1805 and MAX1989
    6. 

  6.     Prefix: 'max1668'
    7. 

  7.     Addresses scanned: I2C 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e
    8. 

  8.     Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX1668-MAX1989.pdf
    9. 

  9. 

  10. Author:
    11. 

  11.     David George <david.george@ska.ac.za>
    12. 

  12. 

  13. Description
    14. 

  14. -----------
    15. 

  15. 

  16. This driver implements support for the Maxim MAX1668, MAX1805 and MAX1989
    17. 

  17. chips.
    18. 

  18. 

  19. The three devices are very similar, but the MAX1805 has a reduced feature
    20. 

  20. set; only two remote temperature inputs vs the four avaible on the other
    21. 

  21. two ICs.
    22. 

  22. 

  23. The driver is able to distinguish between the devices and creates sysfs
    24. 

  24. entries as follows:
    25. 

  25. 

  26. MAX1805, MAX1668 and MAX1989:
    27. 

  27. 

  28. temp1_input     ro local (ambient) temperature
    29. 

  29. temp1_max       rw local temperature maximum threshold for alarm
    30. 

  30. temp1_max_alarm ro local temperature maximum threshold alarm
    31. 

  31. temp1_min       rw local temperature minimum threshold for alarm
    32. 

  32. temp1_min_alarm ro local temperature minimum threshold alarm
    33. 

  33. temp2_input     ro remote temperature 1
    34. 

  34. temp2_max       rw remote temperature 1 maximum threshold for alarm
    35. 

  35. temp2_max_alarm ro remote temperature 1 maximum threshold alarm
    36. 

  36. temp2_min       rw remote temperature 1 minimum threshold for alarm
    37. 

  37. temp2_min_alarm ro remote temperature 1 minimum threshold alarm
    38. 

  38. temp3_input     ro remote temperature 2
    39. 

  39. temp3_max       rw remote temperature 2 maximum threshold for alarm
    40. 

  40. temp3_max_alarm ro remote temperature 2 maximum threshold alarm
    41. 

  41. temp3_min       rw remote temperature 2 minimum threshold for alarm
    42. 

  42. temp3_min_alarm ro remote temperature 2 minimum threshold alarm
    43. 

  43. 

  44. MAX1668 and MAX1989 only:
    45. 

  45. temp4_input     ro remote temperature 3
    46. 

  46. temp4_max       rw remote temperature 3 maximum threshold for alarm
    47. 

  47. temp4_max_alarm ro remote temperature 3 maximum threshold alarm
    48. 

  48. temp4_min       rw remote temperature 3 minimum threshold for alarm
    49. 

  49. temp4_min_alarm ro remote temperature 3 minimum threshold alarm
    50. 

  50. temp5_input     ro remote temperature 4
    51. 

  51. temp5_max       rw remote temperature 4 maximum threshold for alarm
    52. 

  52. temp5_max_alarm ro remote temperature 4 maximum threshold alarm
    53. 

  53. temp5_min       rw remote temperature 4 minimum threshold for alarm
    54. 

  54. temp5_min_alarm ro remote temperature 4 minimum threshold alarm
    55. 

  55. 

  56. Module Parameters
    57. 

  57. -----------------
    58. 

  58. 

  59. * read_only: int
    60. 

  60.   Set to non-zero if you wish to prevent write access to alarm thresholds.
    61.