Documentation/hwmon/ltc4245

   1 Kernel driver ltc4245
   2 =====================
   3
   4 Supported chips:
   5   * Linear Technology LTC4245
   6     Prefix: 'ltc4245'
   7     Addresses scanned: 0x20-0x3f
   8     Datasheet:
   9         http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1006,C1140,P19392,D13517
  10
  11 Author: Ira W. Snyder <iws@ovro.caltech.edu>
  12
  13
  14 Description
  15 -----------
  16
  17 The LTC4245 controller allows a board to be safely inserted and removed
  18 from a live backplane in multiple supply systems such as CompactPCI and
  19 PCI Express.
  20
  21
  22 Usage Notes
  23 -----------
  24
  25 This driver does not probe for LTC4245 devices, due to the fact that some
  26 of the possible addresses are unfriendly to probing. You will need to use
  27 the "force" parameter to tell the driver where to find the device.
  28
  29 Example: the following will load the driver for an LTC4245 at address 0x23
  30 on I2C bus #1:
  31 $ modprobe ltc4245 force=1,0x23
  32
  33
  34 Sysfs entries
  35 -------------
  36
  37 The LTC4245 has built-in limits for over and under current warnings. This
  38 makes it very likely that the reference circuit will be used.
  39
  40 This driver uses the values in the datasheet to change the register values
  41 into the values specified in the sysfs-interface document. The current readings
  42 rely on the sense resistors listed in Table 2: "Sense Resistor Values".
  43
  44 in1_input               12v input voltage (mV)
  45 in2_input               5v  input voltage (mV)
  46 in3_input               3v  input voltage (mV)
  47 in4_input               Vee (-12v) input voltage (mV)
  48
  49 in1_min_alarm           12v input undervoltage alarm
  50 in2_min_alarm           5v  input undervoltage alarm
  51 in3_min_alarm           3v  input undervoltage alarm
  52 in4_min_alarm           Vee (-12v) input undervoltage alarm
  53
  54 curr1_input             12v current (mA)
  55 curr2_input             5v  current (mA)
  56 curr3_input             3v  current (mA)
  57 curr4_input             Vee (-12v) current (mA)
  58
  59 curr1_max_alarm         12v overcurrent alarm
  60 curr2_max_alarm         5v  overcurrent alarm
  61 curr3_max_alarm         3v  overcurrent alarm
  62 curr4_max_alarm         Vee (-12v) overcurrent alarm
  63
  64 in5_input               12v output voltage (mV)
  65 in6_input               5v  output voltage (mV)
  66 in7_input               3v  output voltage (mV)
  67 in8_input               Vee (-12v) output voltage (mV)
  68
  69 in5_min_alarm           12v output undervoltage alarm
  70 in6_min_alarm           5v  output undervoltage alarm
  71 in7_min_alarm           3v  output undervoltage alarm
  72 in8_min_alarm           Vee (-12v) output undervoltage alarm
  73
  74 in9_input               GPIO #1 voltage data
  75 in10_input              GPIO #2 voltage data
  76 in11_input              GPIO #3 voltage data
  77
  78 power1_input            12v power usage (mW)
  79 power2_input            5v  power usage (mW)
  80 power3_input            3v  power usage (mW)
  81 power4_input            Vee (-12v) power usage (mW)