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VIASIO(4) Device Drivers Manual VIASIO(4)

NAME

viasioVIA VT1211 LPC Super I/O

SYNOPSIS

viasio* at isa? port 0x2e flags 0x0000
viasio* at isa? port 0x4e flags 0x0000

DESCRIPTION

The viasio driver provides support for the VIA VT1211 LPC Super I/O IC. The hardware monitoring and watchdog timer functions are currently supported.
The hardware monitor provides hardware monitoring capabilities to be used with the sysctl(8) interface. The following monitoring sensors are available:
Sensor Units Typical use
TEMP1 uK Pentium II type thermal diode
UCH1 uK or uV DC CPU temperature
UCH2 uK or uV DC System temperature
UCH3 uK or uV DC CPU core voltage
UCH4 uK or uV DC +5V
UCH5 uK or uV DC +12V
+3.3V uV Internal +3.3V
FAN1 RPM Fan tachometer
FAN2 RPM Fan tachometer
If the hardware monitor is not enabled by firmware, the driver can try to enable it if value 0x0001 is present in the flags. Note that enabling the hardware monitor can lead to unexpected results.
The watchdog timer provides a standard watchdog(4) interface. If the watchdog timer is not enabled by firmware, the driver can try to enable it if value 0x0002 is present in the flags.

SEE ALSO

intro(4), isa(4), watchdog(4), sensorsd(8), sysctl(8)

HISTORY

The viasio driver first appeared in OpenBSD 3.8.

AUTHORS

The viasio driver was written by Alexander Yurchenko <grange@openbsd.org>.
July 16, 2013 OpenBSD-current