0001 Kernel driver tmp421
0002 ====================
0003
0004 Supported chips:
0005
0006 * Texas Instruments TMP421
0007
0008 Prefix: 'tmp421'
0009
0010 Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
0011
0012 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
0013
0014 * Texas Instruments TMP422
0015
0016 Prefix: 'tmp422'
0017
0018 Addresses scanned: I2C 0x4c, 0x4d, 0x4e and 0x4f
0019
0020 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
0021
0022 * Texas Instruments TMP423
0023
0024 Prefix: 'tmp423'
0025
0026 Addresses scanned: I2C 0x4c and 0x4d
0027
0028 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
0029
0030 * Texas Instruments TMP441
0031
0032 Prefix: 'tmp441'
0033
0034 Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
0035
0036 Datasheet: https://www.ti.com/product/tmp441
0037
0038 * Texas Instruments TMP442
0039
0040 Prefix: 'tmp442'
0041
0042 Addresses scanned: I2C 0x4c and 0x4d
0043
0044 Datasheet: https://www.ti.com/product/tmp442
0045
0046 Authors:
0047
0048 Andre Prendel <andre.prendel@gmx.de>
0049
0050 Description
0051 -----------
0052
0053 This driver implements support for Texas Instruments TMP421, TMP422,
0054 TMP423, TMP441, and TMP442 temperature sensor chips. These chips
0055 implement one local and up to one (TMP421, TMP441), up to two (TMP422,
0056 TMP442) or up to three (TMP423) remote sensors. Temperature is measured
0057 in degrees Celsius. The chips are wired over I2C/SMBus and specified
0058 over a temperature range of -40 to +125 degrees Celsius. Resolution
0059 for both the local and remote channels is 0.0625 degree C.
0060
0061 The chips support only temperature measurement. The driver exports
0062 the temperature values via the following sysfs files:
0063
0064 **temp[1-4]_input**
0065
0066 **temp[2-4]_fault**
0067
0068 Each sensor can be individually disabled via Devicetree or from sysfs
0069 via:
0070
0071 **temp[1-4]_enable**
0072
0073 If labels were specified in Devicetree, additional sysfs files will
0074 be present:
0075
0076 **temp[1-4]_label**
