root/lm-sensors/trunk/doc/chips/lm92 @ 3000

Revision 3000, 3.4 KB (checked in by khali, 9 years ago)

Fix common spelling errors.

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1Kernel driver `lm92.o'
2======================
3
4Status: Complete and somewhat tested
5
6Supported chips:
7  * National Semiconductors LM92
8    Prefix `lm92'
9    Addresses scanned: I2C 0x48 - 0x4b (inclusive)
10  * National Semiconductors LM76
11    Prefix `lm92'
12    Addresses scanned: none, force parameter needed
13  * Maxim MAX6633/MAX6634/MAX6635
14    Prefix `lm92'
15    Addresses scanned: I2C 0x48 - 0x4f (inclusive)
16    MAX6633 with address in 0x40 - 0x47 needs force parameter
17
18Author: Abraham van der Merwe <abraham@2d3d.co.za>
19
20License: GPL
21
22
23Module Parameters
24-----------------
25
26* force: short array (min = 1, max = 48)
27  List of adapter,address pairs to boldly assume to be present
28* force_lm92: short array (min = 1, max = 48)
29  List of adapter,address pairs which are unquestionably assumed to contain
30  a `lm92' chip
31* probe: short array (min = 1, max = 48)
32  List of adapter,address pairs to scan additionally
33* probe_range: short array (min = 1, max = 48)
34  List of adapter,start-addr,end-addr triples to scan additionally
35* ignore: short array (min = 1, max = 48)
36  List of adapter,address pairs not to scan
37* ignore_range: short array (min = 1, max = 48)
38  List of adapter,start-addr,end-addr triples not to scan
39
40
41Description
42-----------
43
44This driver implements support for the National Semiconductors LM92
45temperature sensor.
46
47Each LM92 temperature sensor supports a single temperature sensor.
48Temperatures are exported to proc in degrees Celsius * 10000 (in other
49words temperatures are accurate to 4 decimal places). There are alarms
50for high, low, and critical thresholds. There's also an hysteresis to
51control the thresholds for resetting alarms.
52
53At the moment the driver controls these sensors in comparator mode and the
54interrupt pins (INT, T_CRIT_A) are ignored.
55
56Support was added later for the LM76 and Maxim MAX6633/MAX6634/MAX6635,
57which are mostly compatible. They have not all been tested, so you
58may need to use the force parameter.
59
60
61Hardware Configurations
62-----------------------
63
64The only thing that can be changed is enabling of the fault queue. Doing so
65ensures that alarms will only be triggered if 4 consecutive readings all
66cross the alarm thresholds. You can enable this behaviour by uncommenting
67the #define in the driver source, and then recompile/reinstall.
68
69
70Chip Features
71-------------
72
73Chip 'lm92'
74
75LABEL                 LABEL CLASS           COMPUTE CLASS          MODE  MAGN
76temp                  -                     -                       R-     4
77temp_high             temp                  temp                    RW     4
78temp_low              temp                  temp                    RW     4
79temp_crit             temp                  temp                    RW     4
80temp_hyst             temp                  temp                    RW     4
81alarms                -                     -                       R-     0
82
83LABEL                 FEATURE SYMBOL                              SYSCTL FILE:N
84temp                  SENSORS_LM92_TEMP                                  temp:1
85temp_high             SENSORS_LM92_TEMP_HIGH                             temp:2
86temp_low              SENSORS_LM92_TEMP_LOW                              temp:3
87temp_crit             SENSORS_LM92_TEMP_CRIT                             temp:4
88temp_hyst             SENSORS_LM92_TEMP_HYST                             temp:5
89alarms                SENSORS_LM92_ALARMS                              alarms:1
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