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1 | Kernel driver tmp401 | ||
2 | ==================== | ||
3 | |||
4 | Supported chips: | ||
5 | * Texas Instruments TMP401 | ||
6 | Prefix: 'tmp401' | ||
7 | Addresses scanned: I2C 0x4c | ||
8 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp401.html | ||
9 | * Texas Instruments TMP411 | ||
10 | Prefix: 'tmp411' | ||
11 | Addresses scanned: I2C 0x4c | ||
12 | Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp411.html | ||
13 | |||
14 | Authors: | ||
15 | Hans de Goede <hdegoede@redhat.com> | ||
16 | Andre Prendel <andre.prendel@gmx.de> | ||
17 | |||
18 | Description | ||
19 | ----------- | ||
20 | |||
21 | This driver implements support for Texas Instruments TMP401 and | ||
22 | TMP411 chips. These chips implements one remote and one local | ||
23 | temperature sensor. Temperature is measured in degrees | ||
24 | Celsius. Resolution of the remote sensor is 0.0625 degree. Local | ||
25 | sensor resolution can be set to 0.5, 0.25, 0.125 or 0.0625 degree (not | ||
26 | supported by the driver so far, so using the default resolution of 0.5 | ||
27 | degree). | ||
28 | |||
29 | The driver provides the common sysfs-interface for temperatures (see | ||
30 | /Documentation/hwmon/sysfs-interface under Temperatures). | ||
31 | |||
32 | The TMP411 chip is compatible with TMP401. It provides some additional | ||
33 | features. | ||
34 | |||
35 | * Minimum and Maximum temperature measured since power-on, chip-reset | ||
36 | |||
37 | Exported via sysfs attributes tempX_lowest and tempX_highest. | ||
38 | |||
39 | * Reset of historical minimum/maximum temperature measurements | ||
40 | |||
41 | Exported via sysfs attribute temp_reset_history. Writing 1 to this | ||
42 | file triggers a reset. | ||