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1 | Kernel driver tmp421 | ||
2 | ==================== | ||
3 | |||
4 | Supported chips: | ||
5 | * Texas Instruments TMP421 | ||
6 | Prefix: 'tmp421' | ||
7 | Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f | ||
8 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html | ||
9 | * Texas Instruments TMP422 | ||
10 | Prefix: 'tmp422' | ||
11 | Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f | ||
12 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html | ||
13 | * Texas Instruments TMP423 | ||
14 | Prefix: 'tmp423' | ||
15 | Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f | ||
16 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html | ||
17 | |||
18 | Authors: | ||
19 | Andre Prendel <andre.prendel@gmx.de> | ||
20 | |||
21 | Description | ||
22 | ----------- | ||
23 | |||
24 | This driver implements support for Texas Instruments TMP421, TMP422 | ||
25 | and TMP423 temperature sensor chips. These chips implement one local | ||
26 | and up to one (TMP421), up to two (TMP422) or up to three (TMP423) | ||
27 | remote sensors. Temperature is measured in degrees Celsius. The chips | ||
28 | are wired over I2C/SMBus and specified over a temperature range of -40 | ||
29 | to +125 degrees Celsius. Resolution for both the local and remote | ||
30 | channels is 0.0625 degree C. | ||
31 | |||
32 | The chips support only temperature measurement. The driver exports | ||
33 | the temperature values via the following sysfs files: | ||
34 | |||
35 | temp[1-4]_input | ||
36 | temp[2-4]_fault | ||