mirror of
https://github.com/lm-sensors/lm-sensors.git
synced 2026-10-24 12:04:33 +00:00
Jean Delvare
46c0a4650e
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1965 7894878c-1315-0410-8ee3-d5d059ff63e0
105 lines
4.3 KiB
Plaintext
105 lines
4.3 KiB
Plaintext
Kernel driver `lm90.o'
|
|
=====================
|
|
|
|
Status: Complete but untested
|
|
|
|
Supported chips:
|
|
* National Semiconductor LM90
|
|
Prefix: `lm90'
|
|
Addresses scanned: I2C 0x4c
|
|
Datasheet: Publicly available at the National Semiconductor website
|
|
http://www.national.com/pf/LM/LM90.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_lm90: short array (min = 1, max = 48)
|
|
List of adapter,address pairs which are unquestionably assumed to contain
|
|
a `lm90' 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 LM90 is a digital temperature sensor. It senses its own temperature as
|
|
well as the temperature of up to one external diode. It is compatible
|
|
with many other devices such as the LM86, the LM89, the ADM1032, the
|
|
MAX6657 and the MAX6658. The particularity of the LM90 over the LM84 for
|
|
example is that it features critical limits with hysteresis, and an
|
|
increased resolution of the remote temperature measurement.
|
|
|
|
Using the adm1021 or lm83 drivers for a LM90 should work, but the extra
|
|
features won't be supported.
|
|
|
|
The LM90 is found on many motherboards, too many for an exhaustive listing.
|
|
A list of confirmed motherboards follows. If you think the list is wrong or
|
|
want to add a specific motherboard to it, contact us.
|
|
|
|
Confirmed motherboards:
|
|
Gigabyte GA-7VAX
|
|
Gigabyte GA-7VRXP
|
|
|
|
The driver is untested so far. We want testers! Let us know if you want to
|
|
help.
|
|
|
|
All temperature values are given in degrees Celcius. Local and remote
|
|
temperatures are given within a range of +25 to +125 degrees. Resolution
|
|
is 1.0 degree for the local temperature, 0.125 degree for the remote
|
|
temperature. Accuracy is guaranteed to 4.0 degrees, but should reach
|
|
1.5 degree (local) and 3.0 degrees (remote) under typical conditions (see
|
|
the datasheet for more details).
|
|
|
|
Each sensor has its own high and low limits, plus a critical limit.
|
|
Additionally, there is a relative hysteresis value common to both critical
|
|
values.
|
|
|
|
The lm90 driver will not update its values more frequently than every
|
|
other second; reading them more often will do no harm, but will return
|
|
'old' values.
|
|
|
|
|
|
Chip Features
|
|
-------------
|
|
|
|
Chip 'lm90'
|
|
|
|
LABEL LABEL CLASS COMPUTE CLASS MODE MAGN
|
|
temp1 - - R- 0
|
|
temp1_high temp1 temp1 RW 0
|
|
temp1_low temp1 temp1 RW 0
|
|
temp2 - - R- 1
|
|
temp2_high temp2 temp2 RW 1
|
|
temp2_low temp2 temp2 RW 1
|
|
tcrit1 temp1 temp1 RW 0
|
|
tcrit2 temp2 temp2 RW 0
|
|
hyst - - RW 0
|
|
alarms - - R- 0
|
|
|
|
LABEL FEATURE SYMBOL SYSCTL FILE:N
|
|
temp1 SENSORS_LM90_LOCAL_TEMP temp1:3
|
|
temp1_high SENSORS_LM90_LOCAL_HIGH temp1:1
|
|
temp1_low SENSORS_LM90_LOCAL_LOW temp1:2
|
|
temp2 SENSORS_LM90_REMOTE_TEMP temp2:3
|
|
temp2_high SENSORS_LM90_REMOTE_HIGH temp2:1
|
|
temp2_low SENSORS_LM90_REMOTE_LOW temp2:2
|
|
tcrit1 SENSORS_LM90_LOCAL_TCRIT tcrit1:1
|
|
tcrit2 SENSORS_LM90_REMOTE_TCRIT tcrit2:1
|
|
hyst SENSORS_LM90_TCRIT_HYST hyst:1
|
|
alarms SENSORS_LM90_ALARMS alarms:1
|