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