Return-path: Received: from mail-ia0-f174.google.com ([209.85.210.174]:62888 "EHLO mail-ia0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423096Ab2KNRtr (ORCPT ); Wed, 14 Nov 2012 12:49:47 -0500 Received: by mail-ia0-f174.google.com with SMTP id y25so428152iay.19 for ; Wed, 14 Nov 2012 09:49:47 -0800 (PST) Date: Wed, 14 Nov 2012 12:49:40 -0500 From: Bob Copeland To: Sam Leffler Cc: Adrian Chadd , Thomas Pedersen , ath5k-devel@lists.ath5k.org, jirislaby@gmail.com, mickflemm@gmail.com, mcgrof@qca.qualcomm.com, linux-wireless@vger.kernel.org Subject: Re: [PATCH] ath5k: RX timestamp is reported at end of frame Message-ID: <20121114174940.GA22375@localhost> (sfid-20121114_184951_243079_FE95904F) References: <1352746438-2404-1-git-send-email-thomas@cozybit.com> <20121112192859.GB6842@localhost> <20121113043226.GA4064@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, Nov 13, 2012 at 08:27:43AM -0800, Sam Leffler wrote: > It's close enough that if you adjust by the air time for the frame > you'll get an accurate measure of when the preamble was received at > the sta--at least accurate enough for me to synchronize clocks over > 100+ km. Details are available if you search and the code has been in > freebsd for many years... Indeed, that was a good read; thanks for the pointer. -- Bob Copeland %% www.bobcopeland.com