linux/Documentation/hwmon/adm1275
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   1Kernel driver adm1275
   2=====================
   3
   4Supported chips:
   5  * Analog Devices ADM1075
   6    Prefix: 'adm1075'
   7    Addresses scanned: -
   8    Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1075.pdf
   9  * Analog Devices ADM1275
  10    Prefix: 'adm1275'
  11    Addresses scanned: -
  12    Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1275.pdf
  13  * Analog Devices ADM1276
  14    Prefix: 'adm1276'
  15    Addresses scanned: -
  16    Datasheet: www.analog.com/static/imported-files/data_sheets/ADM1276.pdf
  17
  18Author: Guenter Roeck <guenter.roeck@ericsson.com>
  19
  20
  21Description
  22-----------
  23
  24This driver supports hardware montoring for Analog Devices ADM1075, ADM1275,
  25and ADM1276 Hot-Swap Controller and Digital Power Monitor.
  26
  27ADM1075, ADM1275, and ADM1276 are hot-swap controllers that allow a circuit
  28board to be removed from or inserted into a live backplane. They also feature
  29current and voltage readback via an integrated 12-bit analog-to-digital
  30converter (ADC), accessed using a PMBus interface.
  31
  32The driver is a client driver to the core PMBus driver. Please see
  33Documentation/hwmon/pmbus for details on PMBus client drivers.
  34
  35
  36Usage Notes
  37-----------
  38
  39This driver does not auto-detect devices. You will have to instantiate the
  40devices explicitly. Please see Documentation/i2c/instantiating-devices for
  41details.
  42
  43The ADM1075, unlike many other PMBus devices, does not support internal voltage
  44or current scaling. Reported voltages, currents, and power are raw measurements,
  45and will typically have to be scaled.
  46
  47
  48Platform data support
  49---------------------
  50
  51The driver supports standard PMBus driver platform data. Please see
  52Documentation/hwmon/pmbus for details.
  53
  54
  55Sysfs entries
  56-------------
  57
  58The following attributes are supported. Limits are read-write, history reset
  59attributes are write-only, all other attributes are read-only.
  60
  61in1_label               "vin1" or "vout1" depending on chip variant and
  62                        configuration. On ADM1075, vout1 reports the voltage on
  63                        the VAUX pin.
  64in1_input               Measured voltage.
  65in1_min                 Minimum Voltage.
  66in1_max                 Maximum voltage.
  67in1_min_alarm           Voltage low alarm.
  68in1_max_alarm           Voltage high alarm.
  69in1_highest             Historical maximum voltage.
  70in1_reset_history       Write any value to reset history.
  71
  72curr1_label             "iout1"
  73curr1_input             Measured current.
  74curr1_max               Maximum current.
  75curr1_max_alarm         Current high alarm.
  76curr1_lcrit             Critical minimum current. Depending on the chip
  77                        configuration, either curr1_lcrit or curr1_crit is
  78                        supported, but not both.
  79curr1_lcrit_alarm       Critical current low alarm.
  80curr1_crit              Critical maximum current. Depending on the chip
  81                        configuration, either curr1_lcrit or curr1_crit is
  82                        supported, but not both.
  83curr1_crit_alarm        Critical current high alarm.
  84curr1_highest           Historical maximum current.
  85curr1_reset_history     Write any value to reset history.
  86
  87power1_label            "pin1"
  88power1_input            Input power.
  89power1_reset_history    Write any value to reset history.
  90
  91                        Power attributes are supported on ADM1075 and ADM1276
  92                        only.
  93
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