ENVCTRL(4) | Device Drivers Manual (sparc64) | ENVCTRL(4)

# NAME

`envctrl` —
Sun Ultra Enterprise 450 environmental monitoring

# SYNOPSIS

`envctrl* at ebus?`

# DESCRIPTION

The `envctrl` driver provides thermal monitoring of processors and power supplies, as well as automatic fan regulation. The driver attaches to the SUNW,envctrl subsystem found on Ultra Enterprise 450 systems.

The following sensors can be queried with envstat(8):

Sensor | Units | Description
`CPU0` | degC | Processor 0 temperature
`CPU1` | degC | Processor 1 temperature
`CPU2` | degC | Processor 2 temperature
`CPU3` | degC | Processor 3 temperature
`PS0` | degC | Power supply 0 temperature
`PS1` | degC | Power supply 1 temperature
`PS2` | degC | Power supply 2 temperature
`ambient` | degC | Ambient temperature
`cpufan voltage` | V | Voltage used to drive processor fans
`psfan voltage` | V | Voltage used to drive power supply fans
`ps failed` | count | number of failed power supplies
`fans failed` | count | number of failed fans

# SEE ALSO

envsys(4), envstat(8)

# HISTORY

The `envctrl` driver first appeared in NetBSD 5.0.

# AUTHORS

Tobias Nygren <tnn@NetBSD.org>

# BUGS

The driver doesn't support SUNW,envctrltwo found on the Ultra Enterprise 250.

Environmental interrupts are not supported.

April 14, 2007 | NetBSD 9.4