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Kernel driver `lm92.o'
======================
Status: Complete and somewhat tested
Supported chips:
* National Semiconductor LM92
Prefix: 'lm92'
Addresses scanned: I2C 0x48 - 0x4b
* National Semiconductor LM76
Prefix: 'lm92'
Addresses scanned: none, force parameter needed
* Maxim MAX6633/MAX6634/MAX6635
Prefix: 'lm92'
Addresses scanned: I2C 0x48 - 0x4f
MAX6633 with address in 0x40 - 0x47 needs force parameter
Author: Abraham van der Merwe <abraham@2d3d.co.za>
License: GPL
Module Parameters
-----------------
* force: short array (min = 1, max = 48)
List of adapter,address pairs to boldly assume to be present
* force_lm92: short array (min = 1, max = 48)
List of adapter,address pairs which are unquestionably assumed to contain
a `lm92' chip
* probe: short array (min = 1, max = 48)
List of adapter,address pairs to scan additionally
* probe_range: short array (min = 1, max = 48)
List of adapter,start-addr,end-addr triples to scan additionally
* ignore: short array (min = 1, max = 48)
List of adapter,address pairs not to scan
* ignore_range: short array (min = 1, max = 48)
List of adapter,start-addr,end-addr triples not to scan
Description
-----------
This driver implements support for the National Semiconductor LM92
temperature sensor.
Each LM92 temperature sensor supports a single temperature sensor.
Temperatures are exported to proc in degrees Celsius * 10000 (in other
words temperatures are accurate to 4 decimal places). There are alarms
for high, low, and critical thresholds. There's also an hysteresis to
control the thresholds for resetting alarms.
At the moment the driver controls these sensors in comparator mode and the
interrupt pins (INT, T_CRIT_A) are ignored.
Support was added later for the LM76 and Maxim MAX6633/MAX6634/MAX6635,
which are mostly compatible. They have not all been tested, so you
may need to use the force parameter.
Hardware Configurations
-----------------------
The only thing that can be changed is enabling of the fault queue. Doing so
ensures that alarms will only be triggered if 4 consecutive readings all
cross the alarm thresholds. You can enable this behaviour by uncommenting
the #define in the driver source, and then recompile/reinstall.
Chip Features
-------------
Chip 'lm92'
LABEL LABEL CLASS COMPUTE CLASS MODE MAGN
temp - - R- 4
temp_high temp temp RW 4
temp_low temp temp RW 4
temp_crit temp temp RW 4
temp_hyst temp temp RW 4
alarms - - R- 0
LABEL FEATURE SYMBOL SYSCTL FILE:N
temp SENSORS_LM92_TEMP temp:1
temp_high SENSORS_LM92_TEMP_HIGH temp:2
temp_low SENSORS_LM92_TEMP_LOW temp:3
temp_crit SENSORS_LM92_TEMP_CRIT temp:4
temp_hyst SENSORS_LM92_TEMP_HYST temp:5
alarms SENSORS_LM92_ALARMS alarms:1
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