Documentation/hwmon/tmp401.rst

   1 Kernel driver tmp401
   2 ====================
   3
   4 Supported chips:
   5
   6   * Texas Instruments TMP401
   7
   8     Prefix: 'tmp401'
   9
  10     Addresses scanned: I2C 0x4c
  11
  12     Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp401.html
  13
  14   * Texas Instruments TMP411
  15
  16     Prefix: 'tmp411'
  17
  18     Addresses scanned: I2C 0x4c, 0x4d, 0x4e
  19
  20     Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp411.html
  21
  22   * Texas Instruments TMP431
  23
  24     Prefix: 'tmp431'
  25
  26     Addresses scanned: I2C 0x4c, 0x4d
  27
  28     Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp431.html
  29
  30   * Texas Instruments TMP432
  31
  32     Prefix: 'tmp432'
  33
  34     Addresses scanned: I2C 0x4c, 0x4d
  35
  36     Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp432.html
  37
  38   * Texas Instruments TMP435
  39
  40     Prefix: 'tmp435'
  41
  42     Addresses scanned: I2C 0x48 - 0x4f
  43
  44     Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp435.html
  45
  46   * Texas Instruments TMP461
  47
  48     Prefix: 'tmp461'
  49
  50     Datasheet: http://www.ti.com/product/tmp461
  51
  52
  53
  54 Authors:
  55
  56         - Hans de Goede <hdegoede@redhat.com>
  57         - Andre Prendel <andre.prendel@gmx.de>
  58
  59 Description
  60 -----------
  61
  62 This driver implements support for Texas Instruments TMP401, TMP411,
  63 TMP431, TMP432, TMP435, and TMP461 chips. These chips implement one or two
  64 remote and one local temperature sensors. Temperature is measured in degrees
  65 Celsius. Resolution of the remote sensor is 0.0625 degree. Local
  66 sensor resolution can be set to 0.5, 0.25, 0.125 or 0.0625 degree (not
  67 supported by the driver so far, so using the default resolution of 0.5
  68 degree).
  69
  70 The driver provides the common sysfs-interface for temperatures (see
  71 Documentation/hwmon/sysfs-interface.rst under Temperatures).
  72
  73 The TMP411 and TMP431 chips are compatible with TMP401. TMP411 provides
  74 some additional features.
  75
  76 * Minimum and Maximum temperature measured since power-on, chip-reset
  77
  78   Exported via sysfs attributes tempX_lowest and tempX_highest.
  79
  80 * Reset of historical minimum/maximum temperature measurements
  81
  82   Exported via sysfs attribute temp_reset_history. Writing 1 to this
  83   file triggers a reset.
  84
  85 TMP432 is compatible with TMP401 and TMP431. It supports two external
  86 temperature sensors.
  87
  88 TMP461 is compatible with TMP401. It supports offset correction
  89 that is applied to the remote sensor.
  90
  91 * Sensor offset values are temperature values
  92
  93   Exported via sysfs attribute tempX_offset