Documentation/hwmon/ltc2992.rst

   1 .. SPDX-License-Identifier: GPL-2.0
   2
   3 Kernel driver ltc2992
   4 =====================
   5
   6 Supported chips:
   7   * Linear Technology LTC2992
   8     Prefix: 'ltc2992'
   9     Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2992.pdf
  10
  11 Author: Alexandru Tachici <alexandru.tachici@analog.com>
  12
  13
  14 Description
  15 -----------
  16
  17 This driver supports hardware monitoring for Linear Technology LTC2992 power monitor.
  18
  19 LTC2992 is a rail-to-rail system monitor that measures current,
  20 voltage, and power of two supplies.
  21
  22 Two ADCs simultaneously measure each supply's current. A third ADC monitors
  23 the input voltages and four auxiliary external voltages.
  24
  25
  26 Sysfs entries
  27 -------------
  28
  29 The following attributes are supported. Limits are read-write,
  30 all other attributes are read-only.
  31
  32 in_reset_history        Reset all highest/lowest values.
  33
  34 inX_input               Measured voltage.
  35 inX_lowest              Minimum measured voltage.
  36 inX_highest             Maximum measured voltage.
  37 inX_min                 Minimum voltage allowed.
  38 inX_max                 Maximum voltage allowed.
  39 inX_min_alarm           An undervoltage occurred. Cleared on read.
  40 inX_max_alarm           An overvoltage occurred. Cleared on read.
  41
  42 currX_input             Measured current.
  43 currX_lowest            Minimum measured current.
  44 currX_highest           Maximum measured current.
  45 currX_min               Minimum current allowed.
  46 currX_max               Maximum current allowed.
  47 currX_min_alarm         An undercurrent occurred. Cleared on read.
  48 currX_max_alarm         An overcurrent occurred. Cleared on read.
  49
  50 powerX_input            Measured power.
  51 powerX_input_lowest     Minimum measured voltage.
  52 powerX_input_highest    Maximum measured voltage.
  53 powerX_min              Minimum power.
  54 powerX_max              Maximum power.
  55 powerX_min_alarm        An underpower occurred. Cleared on read.
  56 powerX_max_alarm        An overpower occurred. Cleared on read.