xref: /linux/Documentation/hwmon/tmp401.rst (revision 37744feebc086908fd89760650f458ab19071750)
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  * Texas Instruments TMP461
47
48    Prefix: 'tmp461'
49
50    Datasheet: http://www.ti.com/product/tmp461
51
52
53
54Authors:
55
56	- Hans de Goede <hdegoede@redhat.com>
57	- Andre Prendel <andre.prendel@gmx.de>
58
59Description
60-----------
61
62This driver implements support for Texas Instruments TMP401, TMP411,
63TMP431, TMP432, TMP435, and TMP461 chips. These chips implement one or two
64remote and one local temperature sensors. Temperature is measured in degrees
65Celsius. Resolution of the remote sensor is 0.0625 degree. Local
66sensor resolution can be set to 0.5, 0.25, 0.125 or 0.0625 degree (not
67supported by the driver so far, so using the default resolution of 0.5
68degree).
69
70The driver provides the common sysfs-interface for temperatures (see
71Documentation/hwmon/sysfs-interface.rst under Temperatures).
72
73The TMP411 and TMP431 chips are compatible with TMP401. TMP411 provides
74some 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
85TMP432 is compatible with TMP401 and TMP431. It supports two external
86temperature sensors.
87
88TMP461 is compatible with TMP401. It supports offset correction
89that is applied to the remote sensor.
90
91* Sensor offset values are temperature values
92
93  Exported via sysfs attribute tempX_offset
94