mirror of
https://github.com/lm-sensors/lm-sensors.git
synced 2026-10-22 11:46:03 +00:00
Jean Delvare
008037a4ea
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1869 7894878c-1315-0410-8ee3-d5d059ff63e0
118 lines
5.0 KiB
Plaintext
118 lines
5.0 KiB
Plaintext
Kernel driver `lm83.o'
|
|
=====================
|
|
|
|
Status: Incomplete and untested
|
|
|
|
Supported chips:
|
|
* National Semiconductor LM83
|
|
Prefix: `lm83'
|
|
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e (inclusive)
|
|
Datasheet: Publicly available at the National Semiconductor website
|
|
http://www.national.com/pf/LM/LM83.html
|
|
|
|
|
|
Author: Jean Delvare <khali@linux-fr.org>
|
|
|
|
License: GPL
|
|
|
|
|
|
Module Parameters
|
|
-----------------
|
|
|
|
* force: short array (min = 1, max = 48)
|
|
List of adapter,address pairs to boldly assume to be present
|
|
* force_lm83: short array (min = 1, max = 48)
|
|
List of adapter,address pairs which are unquestionably assumed to contain
|
|
a `lm83' 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
|
|
-----------
|
|
|
|
The LM83 is a digital temperature sensor. It senses its own temperature as
|
|
well as the temperature of up to three external diodes. It is compatible
|
|
with many other devices such as the LM84 and all other ADM1021 clones.
|
|
The main difference between the LM83 and the LM84 in that the later can
|
|
only sense the temperature of one external diode.
|
|
|
|
Using the adm1021 driver for a LM83 should work, but only two temperatures
|
|
will be reported instead of four.
|
|
|
|
Alarms and critical temperature (common to all four temperature readings)
|
|
are not handled by this driver yet, but should be someday.
|
|
|
|
The LM83 is only found on a handful of motherboards. An unconfirmed list
|
|
follows. If you can confirm or infirm the fact that any of these
|
|
motherboards do actually have an LM83, please contact us.
|
|
|
|
Gigabyte GA-7VAX
|
|
Gigabyte GA-7VRXP (rev 2.0)
|
|
Gigabyte GA-8IK1100
|
|
Iwill MPX2
|
|
Soltek SL-75DRV5
|
|
|
|
A Gigabyte GA-7VRXP (rev 2.0) motherboard was reported to have an LM90
|
|
instead of the expected LM83. The same could be true for the GA-7VAX. More
|
|
information will be given here as soon as we know more.
|
|
|
|
Note that the driver is untested so far. We really want testers! If you
|
|
want to help, please contact us.
|
|
|
|
The fact that the LM83 is only scarcely used can be easily explained.
|
|
Most motherboards come with more than just temperature sensors for
|
|
health monitoring. They also have voltage and fan rotation speed
|
|
sensors. This means that temperature-only chips are usually used as
|
|
secondary chips coupled with another chip such as an IT87 or similar
|
|
chip, which provides more features. Since systems usually need three
|
|
temperature sensors (motherboard, processor, power supply) and primary
|
|
chips provide some temperature sensors, the secondary chip, if needed,
|
|
won't have to handle more than two temperatures. Thus, ADM1021 clones
|
|
are sufficent, and there is no need for a four temperatures sensor
|
|
chip such as the LM83. The only case where using an LM83 would make
|
|
sense is on SMP systems, such as the above-mentioned Iwill MPX2,
|
|
because you want an additional temperature sensor for each additional
|
|
CPU.
|
|
|
|
All temperature values are given in degrees Celcius. Local temperature
|
|
is given within a range of 0 to +85 degrees. Remote temperatures are
|
|
given within a range of 0 to +125 degrees. Resolution is 1.0 degree,
|
|
accuracy is guaranteed to 3.0 degrees (see the datasheet for more
|
|
details).
|
|
|
|
Each sensor has its own high limit. There is no hysteresis mechanism as
|
|
found on most recent temperature sensors.
|
|
|
|
|
|
Chip Features
|
|
-------------
|
|
|
|
Chip 'lm83'
|
|
|
|
LABEL LABEL CLASS COMPUTE CLASS MODE MAGN
|
|
temp1 - - R- 0
|
|
temp1_high temp1 temp1 RW 0
|
|
temp2 - - R- 0
|
|
temp2_high temp2 temp2 RW 0
|
|
temp3 - - R- 0
|
|
temp3_high temp3 temp3 RW 0
|
|
temp4 - - R- 0
|
|
temp4_high temp4 temp4 RW 0
|
|
|
|
LABEL FEATURE SYMBOL SYSCTL FILE:N
|
|
temp1 SENSORS_LM83_LOCAL_TEMP temp1:2
|
|
temp1_high SENSORS_LM83_LOCAL_HIGH temp1:1
|
|
temp2 SENSORS_LM83_REMOTE1_TEMP temp2:2
|
|
temp2_high SENSORS_LM83_REMOTE1_HIGH temp2:1
|
|
temp3 SENSORS_LM83_REMOTE2_TEMP temp3:2
|
|
temp3_high SENSORS_LM83_REMOTE2_HIGH temp3:1
|
|
temp4 SENSORS_LM83_REMOTE3_TEMP temp4:2
|
|
temp4_high SENSORS_LM83_REMOTE3_HIGH temp4:1
|