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Kernel driver `via686a.o'
=========================
Status: Stable.
Supported chips:
* Via VT82C686A, VT82C686B Southbridge Integrated Hardware Monitor
Prefix: 'via686a'
Addresses scanned: ISA in PCI-space encoded address
Datasheet: On request through web form
(http://www.via.com.tw/en/support/datasheets/)
Authors: Kysti Mlkki <kmalkki@cc.hut.fi>,
Mark D. Studebaker <mdsxyz123@yahoo.com>
Bob Dougherty <bobd@stanford.edu>
(Some conversion-factor data were contributed by
Jonathan Teh Soon Yew <j.teh@iname.com>
and Alex van Kaam <darkside@chello.nl>.)
Module Parameters
-----------------
force_addr=0xaddr Set the I/O base address. Useful for boards that
don't set the address in the BIOS. Look for a BIOS
upgrade before resorting to this. Does not do a
PCI force; the via686a must still be present in lspci.
Don't use this unless the driver complains that the
base address is not set.
Example: 'modprobe via686a force_addr=0x6000'
Description
-----------
The driver does not distinguish between the chips and reports
all as a 686A.
The Via 686a southbridge has integrated hardware monitor functionality.
It also has an I2C bus, but this driver only supports the hardware monitor.
For the I2C bus driver, see ../busses/i2c-viapro.
The Via 686a implements three temperature sensors, two fan rotation speed
sensors, five voltage sensors and alarms.
Temperatures are measured in degrees Celsius. An alarm is triggered once
when the Overtemperature Shutdown limit is crossed; it is triggered again
as soon as it drops below the hysteresis value.
Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
triggered if the rotation speed has dropped below a programmable limit. Fan
readings can be divided by a programmable divider (1, 2, 4 or 8) to give
the readings more range or accuracy. Not all RPM values can accurately be
represented, so some rounding is done. With a divider of 2, the lowest
representable value is around 2600 RPM.
Voltage sensors (also known as IN sensors) report their values in volts.
An alarm is triggered if the voltage has crossed a programmable minimum
or maximum limit. Voltages are internally scalled, so each voltage channel
has a different resolution and range.
If an alarm triggers, it will remain triggered until the hardware register
is read at least once. This means that the cause for the alarm may
already have disappeared! Note that in the current implementation, all
hardware registers are read whenever any data is read (unless it is less
than 1.5 seconds since the last update). This means that you can easily
miss once-only alarms.
The driver only updates its values each 1.5 seconds; reading it more often
will do no harm, but will return 'old' values.
Known Issues
------------
This driver handles sensors integrated in some VIA south bridges. It is
possible that a motherboard maker used a VT82C686A/B chip as part of a
product design but was not interested in its hardware monitoring features,
in which case the sensor inputs will not be wired. This is the case of
the Asus K7V, A7V and A7V133 motherboards, to name only a few of them.
So, if you need the force_addr parameter, and end up with values which
don't seem to make any sense, don't look any further: your chip is simply
not wired for hardware monitoring.
Chip Features
-------------
Chip `via686a'
LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
in0 NONE NONE R 2
in1 NONE NONE R 2
in2 NONE NONE R 2
in3 NONE NONE R 2
in4 NONE NONE R 2
in0_min in0 in0 RW 2
in1_min in1 in1 RW 2
in2_min in2 in2 RW 2
in3_min in3 in3 RW 2
in4_min in3 in3 RW 2
in0_max in0 in0 RW 2
in1_max in1 in1 RW 2
in2_max in2 in2 RW 2
in3_max in3 in3 RW 2
in4_max in3 in3 RW 2
fan1 NONE NONE R 0
fan2 NONE NONE R 0
fan1_min fan1 fan1 RW 0
fan2_min fan2 fan2 RW 0
temp NONE NONE R 1
temp_hyst temp temp RW 1
temp_over temp temp RW 1
temp2 NONE NONE R 1
temp2_hyst temp temp RW 1
temp2_over temp temp RW 1
temp3 NONE NONE R 1
temp3_hyst temp temp RW 1
temp3_over temp temp RW 1
fan1_div fan1 NONE RW 0
fan2_div fan2 NONE RW 0
alarms NONE NONE R 0
LABEL FEATURE SYMBOL SYSCTL FILE:NR
in0 SENSORS_VIA686A_IN0 in0:3
in1 SENSORS_VIA686A_IN1 in1:3
in2 SENSORS_VIA686A_IN2 in2:3
in3 SENSORS_VIA686A_IN3 in3:3
in4 SENSORS_VIA686A_IN4 in4:3
in0_min SENSORS_VIA686A_IN0_MIN in0:1
in1_min SENSORS_VIA686A_IN1_MIN in1:1
in2_min SENSORS_VIA686A_IN2_MIN in2:1
in3_min SENSORS_VIA686A_IN3_MIN in3:1
in4_min SENSORS_VIA686A_IN4_MIN in4:1
in0_max SENSORS_VIA686A_IN0_MAX in0:2
in1_max SENSORS_VIA686A_IN1_MAX in1:2
in2_max SENSORS_VIA686A_IN2_MAX in2:2
in3_max SENSORS_VIA686A_IN3_MAX in3:2
in4_max SENSORS_VIA686A_IN4_MAX in4:2
fan1 SENSORS_VIA686A_FAN1 fan1:2
fan2 SENSORS_VIA686A_FAN2 fan2:2
fan1_min SENSORS_VIA686A_FAN1_MIN fan1:1
fan2_min SENSORS_VIA686A_FAN2_MIN fan2:1
temp SENSORS_VIA686A_TEMP temp:3
temp_hyst SENSORS_VIA686A_TEMP_HYST temp:2
temp_over SENSORS_VIA686A_TEMP_OVER temp:1
temp2 SENSORS_VIA686A_TEMP2 temp2:3
temp2_hyst SENSORS_VIA686A_TEMP2_HYST temp2:2
temp2_over SENSORS_VIA686A_TEMP2_OVER temp2:1
temp3 SENSORS_VIA686A_TEMP3 temp3:3
temp3_hyst SENSORS_VIA686A_TEMP3_HYST temp3:2
temp3_over SENSORS_VIA686A_TEMP3_OVER temp3:1
fan1_div SENSORS_VIA686A_FAN1_DIV fan_div:1
fan2_div SENSORS_VIA686A_FAN2_DIV fan_div:2
alarms SENSORS_VIA686A_ALARMS alarms:1
|
