From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752690Ab0IVP4k (ORCPT ); Wed, 22 Sep 2010 11:56:40 -0400 Received: from terminus.zytor.com ([198.137.202.10]:49602 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751298Ab0IVP4j (ORCPT ); Wed, 22 Sep 2010 11:56:39 -0400 Message-ID: <4C9A271F.30608@zytor.com> Date: Wed, 22 Sep 2010 08:56:15 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100907 Fedora/3.1.3-1.fc13 Thunderbird/3.1.3 MIME-Version: 1.0 To: Bjorn Helgaas CC: mingo@redhat.com, linux-kernel@vger.kernel.org, yinghai@kernel.org, just.for.lkml@googlemail.com, tglx@linutronix.de, hpa@linux.intel.com Subject: Re: Early console confusion References: <4C7B0578.8090807@kernel.org> <201009220912.45360.bjorn.helgaas@hp.com> In-Reply-To: <201009220912.45360.bjorn.helgaas@hp.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/22/2010 08:12 AM, Bjorn Helgaas wrote: > Can somebody explain the differences between > > earlycon=uart,... > earlycon=uart8250,... > earlyprintk=serial,... > console=uart,... > console=uart8250,... > > I'm not really convinced we need them all, and it's getting a > little confusing. > Some of them come from the embedded industry, where it's felt that you have to be able to specify the exact parameters because there are no standards, and some come from the PC world where "serial port 0" is a well-defined concept and noone wants to bloody call it "uart8250,0x3f8". -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.