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lineage-pem

lineage-pem 2.3 KB
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  1. Kernel driver lineage-pem
    2. 

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

  3. 

  4. Supported devices:
    5. 

  5.   * Lineage Compact Power Line Power Entry Modules
    6. 

  6.     Prefix: 'lineage-pem'
    7. 

  7.     Addresses scanned: -
    8. 

  8.     Documentation:
    9. 

  9.         http://www.lineagepower.com/oem/pdf/CPLI2C.pdf
    10. 

  10. 

  11. Author: Guenter Roeck <linux@roeck-us.net>
    12. 

  12. 

  13. 

  14. Description
    15. 

  15. -----------
    16. 

  16. 

  17. This driver supports various Lineage Compact Power Line DC/DC and AC/DC
    18. 

  18. converters such as CP1800, CP2000AC, CP2000DC, CP2100DC, and others.
    19. 

  19. 

  20. Lineage CPL power entry modules are nominally PMBus compliant. However, most
    21. 

  21. standard PMBus commands are not supported. Specifically, all hardware monitoring
    22. 

  22. and status reporting commands are non-standard. For this reason, a standard
    23. 

  23. PMBus driver can not be used.
    24. 

  24. 

  25. 

  26. Usage Notes
    27. 

  27. -----------
    28. 

  28. 

  29. This driver does not probe for Lineage CPL devices, since there is no register
    30. 

  30. which can be safely used to identify the chip. You will have to instantiate
    31. 

  31. the devices explicitly.
    32. 

  32. 

  33. Example: the following will load the driver for a Lineage PEM at address 0x40
    34. 

  34. on I2C bus #1:
    35. 

  35. $ modprobe lineage-pem
    36. 

  36. $ echo lineage-pem 0x40 > /sys/bus/i2c/devices/i2c-1/new_device
    37. 

  37. 

  38. All Lineage CPL power entry modules have a built-in I2C bus master selector
    39. 

  39. (PCA9541). To ensure device access, this driver should only be used as client
    40. 

  40. driver to the pca9541 I2C master selector driver.
    41. 

  41. 

  42. 

  43. Sysfs entries
    44. 

  44. -------------
    45. 

  45. 

  46. All Lineage CPL devices report output voltage and device temperature as well as
    47. 

  47. alarms for output voltage, temperature, input voltage, input current, input power,
    48. 

  48. and fan status.
    49. 

  49. 

  50. Input voltage, input current, input power, and fan speed measurement is only
    51. 

  51. supported on newer devices. The driver detects if those attributes are supported,
    52. 

  52. and only creates respective sysfs entries if they are.
    53. 

  53. 

  54. in1_input		Output voltage (mV)
    55. 

  55. in1_min_alarm		Output undervoltage alarm
    56. 

  56. in1_max_alarm		Output overvoltage alarm
    57. 

  57. in1_crit		Output voltage critical alarm
    58. 

  58. 

  59. in2_input		Input voltage (mV, optional)
    60. 

  60. in2_alarm		Input voltage alarm
    61. 

  61. 

  62. curr1_input		Input current (mA, optional)
    63. 

  63. curr1_alarm		Input overcurrent alarm
    64. 

  64. 

  65. power1_input		Input power (uW, optional)
    66. 

  66. power1_alarm		Input power alarm
    67. 

  67. 

  68. fan1_input		Fan 1 speed (rpm, optional)
    69. 

  69. fan2_input		Fan 2 speed (rpm, optional)
    70. 

  70. fan3_input		Fan 3 speed (rpm, optional)
    71. 

  71. 

  72. temp1_input
    73. 

  73. temp1_max
    74. 

  74. temp1_crit
    75. 

  75. temp1_alarm
    76. 

  76. temp1_crit_alarm
    77. 

  77. temp1_fault
    78.