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https://github.com/lm-sensors/lm-sensors.git
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Mark D. Studebaker
1dc7bcdb8b
voltages if an r00 chip and iterate = 0. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1568 7894878c-1315-0410-8ee3-d5d059ff63e0
179 lines
8.9 KiB
Plaintext
179 lines
8.9 KiB
Plaintext
Kernel driver `gl518sm.o'
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=========================
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Status: Complete and well-tested
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Supported chips:
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* Genesys Logic GL518SM release 0x00
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Prefix `gl518sm'
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Addresses scanned: I2C 0x2c and 0x2d
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Datasheet: http://www.genesyslogic.com/pdf
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* Genesys Logic GL518SM release 0x80
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Prefix `gl518sm'
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Addresses scanned: I2C 0x2c and 0x2d
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Datasheet: http://www.genesyslogic.com/pdf
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Author: Frodo Looijaard <frodol@dds.nl>,
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Kyösti Mälkki <kmalkki@cc.hut.fi>
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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_gl518sm_r00: 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 `gl518sm_r00' chip
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* force_gl518sm_r80: 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 `gl518sm_r80' chip
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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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* 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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Description
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-----------
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IMPORTANT: For the revision 0x00 chip, the
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in0, in1, and in2 values (+5, +3, and +12) CANNOT be read
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unless you use the slow 'iterate' method. Limits will still
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work even when iterate=0. See below. This is a limitation
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of the chip, not the driver.
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This driver supports the Genesys Logic GL518SM chip. There are at least
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two revision of this chip, which we call revision 0x00 and 0x80. Revision
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0x80 chips support the reading of voltages directly, 0x00 only for VIN3.
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The GL518SM implements one temperature sensor, two FAN rotation speed
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sensors, and four voltage sensors. It can report alarms through the
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computer speakers.
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Temperatures are measured in degrees Celcius. An alarm goes off while the
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temperature is above the over temperature limit, and has not yet dropped
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below the hysteresis limit. The alarm always reflects the current situation.
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Measurements are guaranteed between -10 degrees and +110 degrees, with
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a resolution of +-3 degrees.
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FAN rotation speeds are reported in RPM (rotations per minute). An alarm is
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triggered if the rotation speed has dropped below a programmable limit.
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In case when you have selected to turn Fan1 off, no Fan1 alarm is triggered.
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FAN readings can be divided by a programmable divider (1, 2, 4 or 8) to give
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the readings more range or accuracy. This is important because some FANs
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report only one 'tick' each rotation, while others report two.
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Not all RPM values can accurately be represented, so some rounding is done.
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With a divider of 2, the lowest representable value is around 1900 RPM.
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Voltage sensors (also known as VIN sensors) report their values in volts. An
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alarm is triggered if the voltage has crossed a programmable minimum or
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maximum limit. Note that minimum in this case always means 'closest to
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zero'; this is important for negative voltage measurements. The VDD input
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measures voltages between 0.000 and 5.865 volt, with a resolution of 0.023
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volt. The other inputs measure voltages between 0.000 and 4.845 volt, with a
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resolution of 0.019 volt. Note that revision 0x00 chips do not support
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reading the current voltage of any input except for VIN3; limit setting and
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alarms work fine, though. There is code to compute them by iterating.
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When an alarm goes off, you can be warned by a beeping signal through
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your computer speaker. It is possible to enable all beeping globally,
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or only the beeping for some alarms.
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If an alarm triggers, it will remain triggered until the hardware register
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is read at least once (except for temperature alarms). This means that the
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cause for the alarm may already have disappeared! Note that in the current
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implementation, all hardware registers are read whenever any data is read
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(unless it is less than 1.5 seconds since the last update). This means that
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you can easily miss once-only alarms.
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The GL518SM only updates its values each 1.5 seconds; reading it more often
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will do no harm, but will return 'old' values.
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Iteration Code
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--------------
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IMPORTANT: For the revision 0x00 chip only,
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you may select between three modes to read the vin0-2 inputs with
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the following lines in /etc/sensors.conf:
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set iterate 0 Don't read in0-in2 inputs.
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set iterate 1 Run the iteration loop, this takes up to 10 seconds.
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set iterate 2 Show the results of the last iteration loop,
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and start a new loop to run in the background.
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You may also set the iteration type with
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'echo n > /proc/sys/dev/sensors/gl518sm-i2c-x-y/iterate'.
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If you have a rev 0x80 chip, the in0-in2 inputs are readable.
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In this case, 'iterate' will be read-only and the read value is 3.
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Chip Features
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-------------
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Chip `gl518sm'
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LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
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vdd NONE NONE R 2
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vin1 NONE NONE R 2
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vin2 NONE NONE R 2
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vin3 NONE NONE R 2
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vdd_min vdd vdd RW 2
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vin1_min vin1 vin1 RW 2
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vin2_min vin2 vin2 RW 2
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vin3_min vin3 vin3 RW 2
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vdd_max vdd vdd RW 2
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vin1_max vin1 vin1 RW 2
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vin2_max vin2 vin2 RW 2
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vin3_max vin3 vin3 RW 2
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fan1 NONE NONE R 0
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fan2 NONE NONE R 0
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fan1_min fan1 fan1 RW 0
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fan2_min fan2 fan2 RW 0
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temp NONE NONE R 1
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temp_hyst temp temp RW 1
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temp_over temp temp RW 1
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fan1_div fan1 NONE RW 0
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fan2_div fan2 NONE RW 0
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alarms NONE NONE R 0
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beep_enable alarms NONE RW 0
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beeps alarms alarms RW 0
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fan1_off NONE NONE RW 0
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fan1_off_pin NONE NONE RW 0
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iterate NONE NONE RW 0
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LABEL FEATURE SYMBOL SYSCTL FILE:NR
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vdd SENSORS_GL518_VDD vdd:3
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vin1 SENSORS_GL518_VIN1 vin1:3
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vin2 SENSORS_GL518_VIN2 vin2:3
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vin3 SENSORS_GL518_VIN3 vin3:3
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vdd_min SENSORS_GL518_VDD_MIN vdd:1
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vin1_min SENSORS_GL518_VIN1_MIN vin1:1
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vin2_min SENSORS_GL518_VIN2_MIN vin2:1
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vin3_min SENSORS_GL518_VIN3_MIN vin3:1
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vdd_max SENSORS_GL518_VDD_MAX vdd:2
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vin1_max SENSORS_GL518_VIN1_MAX vin1:2
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vin2_max SENSORS_GL518_VIN2_MAX vin2:2
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vin3_max SENSORS_GL518_VIN3_MAX vin3:2
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fan1 SENSORS_GL518_FAN1 fan1:2
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fan2 SENSORS_GL518_FAN2 fan2:2
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fan1_min SENSORS_GL518_FAN1_MIN fan1:1
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fan2_min SENSORS_GL518_FAN2_MIN fan2:1
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temp SENSORS_GL518_TEMP temp:3
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temp_hyst SENSORS_GL518_TEMP_HYST temp:2
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temp_over SENSORS_GL518_TEMP_OVER temp:1
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fan1_div SENSORS_GL518_FAN1_DIV fan_div:1
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fan2_div SENSORS_GL518_FAN2_DIV fan_div:2
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alarms SENSORS_GL518_ALARMS alarms:1
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beep_enable SENSORS_GL518_BEEP_ENABLE beep:1
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beeps SENSORS_GL518_BEEPS beep:2
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fan1_off SENSORS_GL518_FAN1OFF fan1off:1
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fan1_off_pin SENSORS_GL518_FAN1PIN fan1off:2
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iterate SENSORS_GL518_ITERATE iterate:1
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