TDA(4) | Device Drivers Manual (sparc64) | TDA(4) |
tda
— TDA8444 fan
speed controller
tda0 at iic1 addr 0x24: fan-control
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 |
The temperatures are reported as ‘internal’ and ‘external’ instead of ‘system’ and ‘CPU’, respectively.
February 2, 2013 | NetBSD 10.99 |