NAME
tda —
TDA8444 fan speed
controller
SYNOPSIS
tda0 at iic1 addr 0x24: fan-control
DESCRIPTION
The
tda driver provides support for the TDA8444 DAC used to
control the fan speeds in Sun Blade 1000 and Blade 2000 systems. The speed of
the CPU fan and of the system fan are automatically adjusted every 60 seconds,
based on the currently reported CPU and system temperatures, respectively.
The speed-related values are made available through the
envstat(8) interface. The
range of the values are:
|
Minimum |
Maximum |
CPU temperature |
<=57 |
>=67 |
System temperature |
<=20 |
>=30 |
Speed value |
12 |
63 |
SEE ALSO
admtemp(4),
envstat(8)
BUGS
The temperatures are reported as ‘internal’ and
‘external’ instead of ‘system’ and ‘CPU’,
respectively.