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Kernel driver `lm63.o'
======================
Status: Complete, lightly tested
Supported chips:
* National Semiconductor LM63
Prefix: 'lm63'
Addresses scanned: I2C 0x4c
Datasheet: Publicly available at the National Semiconductor website
http://www.national.com/pf/LM/LM63.html
Author: Jean Delvare <khali@linux-fr.org>
Thanks go to Tyan and especially Alex Buckingham for setting up a remote
access to their S4882 test platform for this driver.
http://www.tyan.com/
License: GPL
Module Parameters
-----------------
* force: short array (min = 1, max = 48)
List of adapter,address pairs to boldly assume to be present
* force_lm63: short array (min = 1, max = 48)
List of adapter,address pairs which are unquestionably assumed to contain
a `lm63' 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 LM63 is a digital temperature sensor with integrated fan monitoring
and control.
All temperature values are given in degrees Celsius. Resolution is 1.0
degree for the local temperature, 0.125 degree for the remote temperature.
The fan speed is measured using a tachometer. Contrary to most chips which
store the value in an 8-bit register and have a selectable clock divider
to make sure that the result will fit in the register, the LM63 uses 16-bit
value for measuring the speed of the fan. It can measure fan speeds down to
83 RPM, at least in theory.
Note that the pin used for fan monitoring is shared with an alert out
function. Depending on how the board designer wanted to use the chip, fan
speed monitoring will or will not be possible. The proper chip configuration
is left to the BIOS, and the driver will blindly trust it.
A PWM output can be used to control the speed of the fan. The LM63 has two
PWM modes: manual and automatic. Automatic mode is not fully implemented yet
(you cannot define your custom pwm/temperature curve), and mode change isn't
supported either.
The lm63 driver will not update its values more frequently than every
second; reading them more often will do no harm, but will return 'old'
values.
Chip Features
-------------
Chip 'lm63'
LABEL LABEL CLASS COMPUTE CLASS MODE MAGN
temp1 - - R- 0
temp1_high temp1 temp1 RW 0
temp2 - - R- 3
temp2_high temp2 temp2 RW 3
temp2_low temp2 temp2 RW 3
temp2_crit temp2 temp2 R- 0
temp2_crit_hyst temp2 temp2 RW 0
fan1 - - R- 0
fan1_low fan1 fan1 RW 0
pwm1 - - RW 0
pwm1_enable pwm1 - R- 0
alarms - - R- 0
LABEL FEATURE SYMBOL SYSCTL FILE:N
temp1 SENSORS_LM63_LOCAL_TEMP temp1:2
temp1_high SENSORS_LM63_LOCAL_HIGH temp1:1
temp2 SENSORS_LM63_REMOTE_TEMP temp2:3
temp2_high SENSORS_LM63_REMOTE_HIGH temp2:1
temp2_low SENSORS_LM63_REMOTE_LOW temp2:2
temp2_crit SENSORS_LM63_REMOTE_TCRIT temp2_crit:1
temp2_crit_hyst SENSORS_LM63_REMOTE_TCRIT_HYST temp2_crit_hyst:1
fan1 SENSORS_LM63_FAN fan1:2
fan1_low SENSORS_LM63_FAN_LOW fan1:1
pwm1 SENSORS_LM63_PWM pwm1:1
pwm1_enable SENSORS_LM63_PWM_ENABLE pwm1:2
alarms SENSORS_LM63_ALARMS alarms:1
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