1.. SPDX-License-Identifier: GPL-2.0
2
3Kernel driver tmp464
4====================
5
6Supported chips:
7
8  * Texas Instruments TMP464
9
10    Prefix: 'tmp464'
11
12    Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b
13
14    Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp464.html
15
16  * Texas Instruments TMP468
17
18    Prefix: 'tmp468'
19
20    Addresses scanned: I2C 0x48, 0x49, 0x4a and 0x4b
21
22    Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp468.html
23
24Authors:
25
26	Agathe Porte <agathe.porte@nokia.com>
27	Guenter Roeck <linux@roeck-us.net>
28
29Description
30-----------
31
32This driver implements support for Texas Instruments TMP464 and TMP468
33temperature sensor chips. TMP464 provides one local and four remote
34sensors. TMP468 provides one local and eight remote sensors.
35Temperature is measured in degrees Celsius. The chips are wired over
36I2C/SMBus and specified over a temperature range of -40 to +125 degrees
37Celsius. Resolution for both the local and remote channels is 0.0625
38degree C.
39
40The chips support only temperature measurements. The driver exports
41temperature values, limits, and alarms via the following sysfs files:
42
43**temp[1-9]_input**
44
45**temp[1-9]_max**
46
47**temp[1-9]_max_hyst**
48
49**temp[1-9]_max_alarm**
50
51**temp[1-9]_crit**
52
53**temp[1-9]_crit_alarm**
54
55**temp[1-9]_crit_hyst**
56
57**temp[2-9]_offset**
58
59**temp[2-9]_fault**
60
61Each sensor can be individually disabled via Devicetree or from sysfs
62via:
63
64**temp[1-9]_enable**
65
66If labels were specified in Devicetree, additional sysfs files will
67be present:
68
69**temp[1-9]_label**
70
71The update interval is configurable with the following sysfs attribute.
72
73**update_interval**
74