mirror of
https://github.com/lm-sensors/lm-sensors.git
synced 2026-10-19 11:19:31 +00:00
Jean Delvare
64d4181b85
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@3146 7894878c-1315-0410-8ee3-d5d059ff63e0
156 lines
8.0 KiB
Plaintext
156 lines
8.0 KiB
Plaintext
Kernel driver `via686a.o'
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=========================
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Status: Stable.
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Supported chips:
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* Via VT82C686A, VT82C686B Southbridge Integrated Hardware Monitor
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Prefix: 'via686a'
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Addresses scanned: ISA in PCI-space encoded address
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Datasheet: On request through web form
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(http://www.via.com.tw/en/support/datasheets/)
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Authors: Kyösti Mälkki <kmalkki@cc.hut.fi>,
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Mark D. Studebaker <mdsxyz123@yahoo.com>
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Bob Dougherty <bobd@stanford.edu>
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(Some conversion-factor data were contributed by
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Jonathan Teh Soon Yew <j.teh@iname.com>
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and Alex van Kaam <darkside@chello.nl>.)
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Module Parameters
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-----------------
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force_addr=0xaddr Set the I/O base address. Useful for boards that
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don't set the address in the BIOS. Look for a BIOS
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upgrade before resorting to this. Does not do a
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PCI force; the via686a must still be present in lspci.
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Don't use this unless the driver complains that the
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base address is not set.
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Example: 'modprobe via686a force_addr=0x6000'
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Description
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-----------
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The driver does not distinguish between the chips and reports
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all as a 686A.
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The Via 686a southbridge has integrated hardware monitor functionality.
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It also has an I2C bus, but this driver only supports the hardware monitor.
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For the I2C bus driver, see ../busses/i2c-viapro.
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The Via 686a implements three temperature sensors, two fan rotation speed
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sensors, five voltage sensors and alarms.
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Temperatures are measured in degrees Celsius. An alarm is triggered once
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when the Overtemperature Shutdown limit is crossed; it is triggered again
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as soon as it drops below the hysteresis value.
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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. Fan
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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. Not all RPM values can accurately be
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represented, so some rounding is done. With a divider of 2, the lowest
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representable value is around 2600 RPM.
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Voltage sensors (also known as IN sensors) report their values in volts.
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An alarm is triggered if the voltage has crossed a programmable minimum
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or maximum limit. Voltages are internally scalled, so each voltage channel
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has a different resolution and range.
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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. This means that the cause for the alarm may
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already have disappeared! Note that in the current implementation, all
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hardware registers are read whenever any data is read (unless it is less
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than 1.5 seconds since the last update). This means that you can easily
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miss once-only alarms.
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The driver 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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Known Issues
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------------
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This driver handles sensors integrated in some VIA south bridges. It is
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possible that a motherboard maker used a VT82C686A/B chip as part of a
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product design but was not interested in its hardware monitoring features,
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in which case the sensor inputs will not be wired. This is the case of
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the Asus K7V, A7V and A7V133 motherboards, to name only a few of them.
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So, if you need the force_addr parameter, and end up with values which
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don't seem to make any sense, don't look any further: your chip is simply
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not wired for hardware monitoring.
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Chip Features
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-------------
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Chip `via686a'
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LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
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in0 NONE NONE R 2
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in1 NONE NONE R 2
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in2 NONE NONE R 2
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in3 NONE NONE R 2
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in4 NONE NONE R 2
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in0_min in0 in0 RW 2
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in1_min in1 in1 RW 2
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in2_min in2 in2 RW 2
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in3_min in3 in3 RW 2
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in4_min in3 in3 RW 2
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in0_max in0 in0 RW 2
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in1_max in1 in1 RW 2
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in2_max in2 in2 RW 2
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in3_max in3 in3 RW 2
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in4_max in3 in3 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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temp2 NONE NONE R 1
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temp2_hyst temp temp RW 1
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temp2_over temp temp RW 1
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temp3 NONE NONE R 1
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temp3_hyst temp temp RW 1
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temp3_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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LABEL FEATURE SYMBOL SYSCTL FILE:NR
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in0 SENSORS_VIA686A_IN0 in0:3
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in1 SENSORS_VIA686A_IN1 in1:3
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in2 SENSORS_VIA686A_IN2 in2:3
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in3 SENSORS_VIA686A_IN3 in3:3
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in4 SENSORS_VIA686A_IN4 in4:3
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in0_min SENSORS_VIA686A_IN0_MIN in0:1
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in1_min SENSORS_VIA686A_IN1_MIN in1:1
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in2_min SENSORS_VIA686A_IN2_MIN in2:1
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in3_min SENSORS_VIA686A_IN3_MIN in3:1
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in4_min SENSORS_VIA686A_IN4_MIN in4:1
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in0_max SENSORS_VIA686A_IN0_MAX in0:2
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in1_max SENSORS_VIA686A_IN1_MAX in1:2
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in2_max SENSORS_VIA686A_IN2_MAX in2:2
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in3_max SENSORS_VIA686A_IN3_MAX in3:2
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in4_max SENSORS_VIA686A_IN4_MAX in4:2
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fan1 SENSORS_VIA686A_FAN1 fan1:2
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fan2 SENSORS_VIA686A_FAN2 fan2:2
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fan1_min SENSORS_VIA686A_FAN1_MIN fan1:1
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fan2_min SENSORS_VIA686A_FAN2_MIN fan2:1
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temp SENSORS_VIA686A_TEMP temp:3
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temp_hyst SENSORS_VIA686A_TEMP_HYST temp:2
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temp_over SENSORS_VIA686A_TEMP_OVER temp:1
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temp2 SENSORS_VIA686A_TEMP2 temp2:3
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temp2_hyst SENSORS_VIA686A_TEMP2_HYST temp2:2
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temp2_over SENSORS_VIA686A_TEMP2_OVER temp2:1
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temp3 SENSORS_VIA686A_TEMP3 temp3:3
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temp3_hyst SENSORS_VIA686A_TEMP3_HYST temp3:2
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temp3_over SENSORS_VIA686A_TEMP3_OVER temp3:1
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fan1_div SENSORS_VIA686A_FAN1_DIV fan_div:1
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fan2_div SENSORS_VIA686A_FAN2_DIV fan_div:2
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alarms SENSORS_VIA686A_ALARMS alarms:1
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