From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755321Ab2LFSnH (ORCPT ); Thu, 6 Dec 2012 13:43:07 -0500 Received: from terminus.zytor.com ([198.137.202.10]:52672 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751674Ab2LFSnF (ORCPT ); Thu, 6 Dec 2012 13:43:05 -0500 Message-ID: <50C0E737.2000201@zytor.com> Date: Thu, 06 Dec 2012 10:43:03 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: Woody Wu CC: linux-kernel@vger.kernel.org Subject: Re: 8250 UART doesn't work References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/05/2012 11:56 PM, Woody Wu wrote: > Hi, list > > Does anyone here familiar to the serial 8250 driver? > > I enabled two uart ports in my board definition, but the ports doesn't > appear after I loaded the kernel (3.4.19). I discovered, it failed at > the UART port auto configuration stage, the exact function is > autoconfig(...) in drivers/tty/serial/8250.c. > Sounds like you're using some kind of buggy UART IP... sharing which one might help people identify the problem, if they have seen it before. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.