From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759227Ab0ENKbX (ORCPT ); Fri, 14 May 2010 06:31:23 -0400 Received: from he.sipsolutions.net ([78.46.109.217]:36913 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758830Ab0ENKbW (ORCPT ); Fri, 14 May 2010 06:31:22 -0400 Subject: usb debug port documentation From: Johannes Berg To: LKML Cc: Jason Wessel , Yinghai Lu Content-Type: text/plain; charset="UTF-8" Date: Fri, 14 May 2010 12:31:16 +0200 Message-ID: <1273833076.4950.4.camel@jlt3.sipsolutions.net> Mime-Version: 1.0 X-Mailer: Evolution 2.29.92.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I've been looking at http://www.kernel.org/doc/Documentation/x86/earlyprintk.txt and spent a while finding everything correctly in place. One of the big unknowns is what way debug ports are enumerated, so if you have a few USB ports you end up trying a lot. At the same time, I at least wasn't sure I was doing everything correctly to start with. It does seem, for example, that I needed the serial driver built in the kernel too? In any case, to help others I was wondering if we should start a wiki page somewhere or so that just lists what port on various machines people have gotten it to work on? I have a Toshiba Satellite U505 and earlyprintk=dbgp,keep uses the port on the right-hand side of the machine... That information could possibly help somebody who is setting it up for the first time, since it reduces the search space? :) If there's an appropriate wiki, I'd like to be pointed to it so I can start a page and submit a kernel patch pointing to it. Otherwise I'll just create it internally since we all typically use just a handful of machine types, but it seems like public could help more people. johannes