mirror of
https://github.com/lm-sensors/lm-sensors.git
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Jean Delvare
2f070b1860
porting the chips documentation to Linux 2.6. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@3007 7894878c-1315-0410-8ee3-d5d059ff63e0
103 lines
4.4 KiB
Plaintext
103 lines
4.4 KiB
Plaintext
Kernel driver `lm63.o'
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======================
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Status: Complete, lightly tested
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Supported chips:
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* National Semiconductor LM63
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Prefix: 'lm63'
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Addresses scanned: I2C 0x4c
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Datasheet: Publicly available at the National Semiconductor website
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http://www.national.com/pf/LM/LM63.html
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Author: Jean Delvare <khali@linux-fr.org>
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Thanks go to Tyan and especially Alex Buckingham for setting up a remote
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access to their S4882 test platform for this driver.
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http://www.tyan.com/
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License: GPL
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Module Parameters
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-----------------
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* force: short array (min = 1, max = 48)
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List of adapter,address pairs to boldly assume to be present
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* force_lm63: short array (min = 1, max = 48)
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List of adapter,address pairs which are unquestionably assumed to contain
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a `lm63' chip
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* probe: short array (min = 1, max = 48)
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List of adapter,address pairs to scan additionally
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* probe_range: short array (min = 1, max = 48)
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List of adapter,start-addr,end-addr triples to scan additionally
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* ignore: short array (min = 1, max = 48)
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List of adapter,address pairs not to scan
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* ignore_range: short array (min = 1, max = 48)
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List of adapter,start-addr,end-addr triples not to scan
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Description
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-----------
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The LM63 is a digital temperature sensor with integrated fan monitoring
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and control.
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All temperature values are given in degrees Celsius. Resolution is 1.0
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degree for the local temperature, 0.125 degree for the remote temperature.
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The fan speed is measured using a tachometer. Contrary to most chips which
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store the value in an 8-bit register and have a selectable clock divider
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to make sure that the result will fit in the register, the LM63 uses 16-bit
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value for measuring the speed of the fan. It can measure fan speeds down to
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83 RPM, at least in theory.
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Note that the pin used for fan monitoring is shared with an alert out
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function. Depending on how the board designer wanted to use the chip, fan
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speed monitoring will or will not be possible. The proper chip configuration
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is left to the BIOS, and the driver will blindly trust it.
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A PWM output can be used to control the speed of the fan. The LM63 has two
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PWM modes: manual and automatic. Automatic mode is not fully implemented yet
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(you cannot define your custom pwm/temperature curve), and mode change isn't
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supported either.
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The lm63 driver will not update its values more frequently than every
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second; reading them more often will do no harm, but will return 'old'
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values.
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Chip Features
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-------------
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Chip 'lm63'
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LABEL LABEL CLASS COMPUTE CLASS MODE MAGN
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temp1 - - R- 0
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temp1_high temp1 temp1 RW 0
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temp2 - - R- 3
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temp2_high temp2 temp2 RW 3
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temp2_low temp2 temp2 RW 3
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temp2_crit temp2 temp2 R- 0
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temp2_crit_hyst temp2 temp2 RW 0
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fan1 - - R- 0
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fan1_low fan1 fan1 RW 0
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pwm1 - - RW 0
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pwm1_enable pwm1 - R- 0
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alarms - - R- 0
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LABEL FEATURE SYMBOL SYSCTL FILE:N
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temp1 SENSORS_LM63_LOCAL_TEMP temp1:2
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temp1_high SENSORS_LM63_LOCAL_HIGH temp1:1
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temp2 SENSORS_LM63_REMOTE_TEMP temp2:3
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temp2_high SENSORS_LM63_REMOTE_HIGH temp2:1
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temp2_low SENSORS_LM63_REMOTE_LOW temp2:2
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temp2_crit SENSORS_LM63_REMOTE_TCRIT temp2_crit:1
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temp2_crit_hyst SENSORS_LM63_REMOTE_TCRIT_HYST temp2_crit_hyst:1
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fan1 SENSORS_LM63_FAN fan1:2
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fan1_low SENSORS_LM63_FAN_LOW fan1:1
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pwm1 SENSORS_LM63_PWM pwm1:1
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pwm1_enable SENSORS_LM63_PWM_ENABLE pwm1:2
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alarms SENSORS_LM63_ALARMS alarms:1
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