1 Kernel driver tmp421 1 Kernel driver tmp421
2 ==================== 2 ====================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * Texas Instruments TMP421 6 * Texas Instruments TMP421
7 7
8 Prefix: 'tmp421' 8 Prefix: 'tmp421'
9 9
10 Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0 10 Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
11 11
12 Datasheet: http://focus.ti.com/docs/prod/f 12 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
13 13
14 * Texas Instruments TMP422 14 * Texas Instruments TMP422
15 15
16 Prefix: 'tmp422' 16 Prefix: 'tmp422'
17 17
18 Addresses scanned: I2C 0x4c, 0x4d, 0x4e an 18 Addresses scanned: I2C 0x4c, 0x4d, 0x4e and 0x4f
19 19
20 Datasheet: http://focus.ti.com/docs/prod/f 20 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
21 21
22 * Texas Instruments TMP423 22 * Texas Instruments TMP423
23 23
24 Prefix: 'tmp423' 24 Prefix: 'tmp423'
25 25
26 Addresses scanned: I2C 0x4c and 0x4d 26 Addresses scanned: I2C 0x4c and 0x4d
27 27
28 Datasheet: http://focus.ti.com/docs/prod/f 28 Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp421.html
29 29
30 * Texas Instruments TMP441 30 * Texas Instruments TMP441
31 31
32 Prefix: 'tmp441' 32 Prefix: 'tmp441'
33 33
34 Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0 34 Addresses scanned: I2C 0x2a, 0x4c, 0x4d, 0x4e and 0x4f
35 35
36 Datasheet: https://www.ti.com/product/tmp4 36 Datasheet: https://www.ti.com/product/tmp441
37 37
38 * Texas Instruments TMP442 38 * Texas Instruments TMP442
39 39
40 Prefix: 'tmp442' 40 Prefix: 'tmp442'
41 41
42 Addresses scanned: I2C 0x4c and 0x4d 42 Addresses scanned: I2C 0x4c and 0x4d
43 43
44 Datasheet: https://www.ti.com/product/tmp4 44 Datasheet: https://www.ti.com/product/tmp442
45 45
46 Authors: 46 Authors:
47 47
48 Andre Prendel <andre.prendel@gmx.de> 48 Andre Prendel <andre.prendel@gmx.de>
49 49
50 Description 50 Description
51 ----------- 51 -----------
52 52
53 This driver implements support for Texas Instr 53 This driver implements support for Texas Instruments TMP421, TMP422,
54 TMP423, TMP441, and TMP442 temperature sensor 54 TMP423, TMP441, and TMP442 temperature sensor chips. These chips
55 implement one local and up to one (TMP421, TMP 55 implement one local and up to one (TMP421, TMP441), up to two (TMP422,
56 TMP442) or up to three (TMP423) remote sensors 56 TMP442) or up to three (TMP423) remote sensors. Temperature is measured
57 in degrees Celsius. The chips are wired over I 57 in degrees Celsius. The chips are wired over I2C/SMBus and specified
58 over a temperature range of -40 to +125 degree 58 over a temperature range of -40 to +125 degrees Celsius. Resolution
59 for both the local and remote channels is 0.06 59 for both the local and remote channels is 0.0625 degree C.
60 60
61 The chips support only temperature measurement 61 The chips support only temperature measurement. The driver exports
62 the temperature values via the following sysfs 62 the temperature values via the following sysfs files:
63 63
64 **temp[1-4]_input** 64 **temp[1-4]_input**
65 65
66 **temp[2-4]_fault** 66 **temp[2-4]_fault**
67 67
68 Each sensor can be individually disabled via D 68 Each sensor can be individually disabled via Devicetree or from sysfs
69 via: 69 via:
70 70
71 **temp[1-4]_enable** 71 **temp[1-4]_enable**
72 72
73 If labels were specified in Devicetree, additi 73 If labels were specified in Devicetree, additional sysfs files will
74 be present: 74 be present:
75 75
76 **temp[1-4]_label** 76 **temp[1-4]_label**
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