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Date: Wed, 1 Jun 2011 08:46:50 +0800
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Subject: Re: [RFC 00/32] ath9k: add initial support for AR9330
From: Adrian Chadd <adrian@freebsd.org>
To: Daniel Halperin <dhalperi@cs.washington.edu>
Cc: Gabor Juhos <juhosg@openwrt.org>,
	"John W. Linville" <linville@tuxdriver.com>,
	linux-wireless@vger.kernel.org,
	Luis Rodriguez <Luis.Rodriguez@atheros.com>,
	Vasanthakumar Thiagarajan <vasanth@atheros.com>
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Hi,

On 1 June 2011 03:51, Daniel Halperin <dhalperi@cs.washington.edu> wrote:
> On Tue, May 31, 2011 at 12:36 PM, Gabor Juhos <juhosg@openwrt.org> wrote:
>> It is a 1x1 chip and supports 2.4GHz only.
>
> [snip]
>
>> ?ath9k: enable antenna diversity for AR9330
>
> I'm confused by the combination of these two.

I bet it's like the AR9285 - there's one TX and one RX chain, but two
RX inputs, two LNAs and some controllable bits to determine how the
baseband controls how the LNAs are configured/combined for packet RX.

For clarity (heh), see the diversity combining code in recv.c; it
outlines the various LNA combination modes.


Adrian