From Luis R. Rodriguez on lkml :

“As part of our commitment to help support all of our Atheros devices
under Linux we’d like to announce the release of our Atheros HAL for
our 802.11abg chipsets under the ISC license.

You can find it here:

http://www.kernel.org/pub/linux/kernel/people/mcgrof/legacy-hal.tar.bz2

This can be used as a source of documentation to help ath5k move
forward to support our 802.11abg chipsets as best as possible in
the Linux kernel. We look forward to keep working strongly with the
community on advancing support of all our Atheros chipsets under Linux.”

Very good news, I don’t have to put more effort to make Atheros wifi connection work on my Acer notebook.

Good job

Link Source