xref: /linux/Documentation/hwmon/tmp401.rst (revision cbac924200b838cfb8d8b1415113d788089dc50b)
1Kernel driver tmp401
2====================
3
4Supported 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
47
48Authors:
49
50	- Hans de Goede <hdegoede@redhat.com>
51	- Andre Prendel <andre.prendel@gmx.de>
52
53Description
54-----------
55
56This driver implements support for Texas Instruments TMP401, TMP411,
57TMP431, TMP432, and TMP435 chips. These chips implement one or two
58remote and one local temperature sensors. Temperature is measured in degrees
59Celsius. Resolution of the remote sensor is 0.0625 degree. Local
60sensor resolution can be set to 0.5, 0.25, 0.125 or 0.0625 degree (not
61supported by the driver so far, so using the default resolution of 0.5
62degree).
63
64The driver provides the common sysfs-interface for temperatures (see
65Documentation/hwmon/sysfs-interface.rst under Temperatures).
66
67The TMP411 and TMP431 chips are compatible with TMP401. TMP411 provides
68some additional features.
69
70* Minimum and Maximum temperature measured since power-on, chip-reset
71
72  Exported via sysfs attributes tempX_lowest and tempX_highest.
73
74* Reset of historical minimum/maximum temperature measurements
75
76  Exported via sysfs attribute temp_reset_history. Writing 1 to this
77  file triggers a reset.
78
79TMP432 is compatible with TMP401 and TMP431. It supports two external
80temperature sensors.
81