Documentation/hwmon/lm95245

   1 Kernel driver lm95245
   2 ==================
   3
   4 Supported chips:
   5   * TI LM95235
   6     Addresses scanned: I2C 0x18, 0x29, 0x4c
   7     Datasheet: Publicly available at the TI website
   8                http://www.ti.com/lit/ds/symlink/lm95235.pdf
   9   * TI / National Semiconductor LM95245
  10     Addresses scanned: I2C 0x18, 0x19, 0x29, 0x4c, 0x4d
  11     Datasheet: Publicly available at the TI website
  12                http://www.ti.com/lit/ds/symlink/lm95245.pdf
  13
  14
  15 Author: Alexander Stein <alexander.stein@systec-electronic.com>
  16
  17 Description
  18 -----------
  19
  20 LM95235 and LM95245 are 11-bit digital temperature sensors with a 2-wire System
  21 Management Bus (SMBus) interface and TruTherm technology that can monitor
  22 the temperature of a remote diode as well as its own temperature.
  23 The chips can be used to very accurately monitor the temperature of
  24 external devices such as microprocessors.
  25
  26 All temperature values are given in millidegrees Celsius. Local temperature
  27 is given within a range of -127 to +127.875 degrees. Remote temperatures are
  28 given within a range of -127 to +255 degrees. Resolution depends on
  29 temperature input and range.
  30
  31 Each sensor has its own critical limit. Additionally, there is a relative
  32 hysteresis value common to both critical limits. To make life easier to
  33 user-space applications, two absolute values are exported, one for each
  34 channel, but these values are of course linked. Only the local hysteresis
  35 can be set from user-space, and the same delta applies to the remote
  36 hysteresis.
  37
  38 The lm95245 driver can change its update interval to a fixed set of values.
  39 It will round up to the next selectable interval. See the datasheet for exact
  40 values. Reading sensor values more often will do no harm, but will return
  41 'old' values.