Dynamic Frequency Switching
dfs* at macgpio?
driver provides support for the
Dynamic Frequency Switching feature found on some PowerPC microprocessors.
It conserves power by lowering the processor operating frequency. Depending on
the processor model, the processor-to-system bus ratio can be divided by two
Processors supported by the
part of the PowerPC G4 family and are found on various iBook and PowerBook
MPC7447A PowerPC 7447 "Apollo 7"
MPC7448 PowerPC 7448 "Apollo 8"
MPC7450 RISC Microprocessor Family
Support for the
driver first appeared in