Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:42058 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752388Ab1FUIzi convert rfc822-to-8bit (ORCPT ); Tue, 21 Jun 2011 04:55:38 -0400 MIME-Version: 1.0 In-Reply-To: References: Date: Tue, 21 Jun 2011 14:25:36 +0530 Message-ID: (sfid-20110621_105545_351112_FE8BB652) Subject: Re: [ath9k-devel] Disabling the third antenna for AR9380 in ath9k From: Mohammed Shafi To: Fred Matthews Cc: linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, ath9k-devel@venema.h4ckr.net, ath9k-devel@lists.ath9k.org, susinder@qca.qualcomm.com Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, Jun 21, 2011 at 2:07 AM, Fred Matthews wrote: > Hi all, > I am installing the AR9380 NIC on laptops, but some only have two UFL > connectors, and thus I was wondering if using only two of the UFL antenna > ports will have any negative effect or difference than installing a 2x2 NIC > (AR9280 for example which has only 2 ports anyway). Please kindly explain > with references if possible. > Also for example?is there anyway to disable transmission on the third UFL > port (antenna) from ath9k or otherwise. > Thank you all very much you can change the tx/rx chainmask for 3x3 AR9380 to disable transmission on the third antenna cd /sys/kernel/debug/ieee80211/phy0/ath9k# echo 0x3 > tx_chainmask cd /sys/kernel/debug/ieee80211/phy0/ath9k# echo 0x3 > rx_chainmask after this, ideally it should operate as 2x2 device as per Susinders comments. but if you got AR9280 please try to use that if 2 antenna is the constraint. > _______________________________________________ > ath9k-devel mailing list > ath9k-devel@lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > > -- shafi