tda(4)

tda4

Philips tda8444 fan controller

Usage

tda* at iic?

Overview

The tda driver supports the TDA8444 DAC to adjust the output voltage to the fans on Sun Blade 1000/2000 machines.

The driver watches the internal and external temperature provided by the sensors framework and adjusts the fan speeds accordingly.

History

The tda driver first appeared in OpenBSD 4.3.

Authors

The tda driver was written by Robert Nagy ⟨[email protected]⟩ and Mark Kettenis ⟨[email protected]⟩.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.