From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans Beckerus Subject: Re: USB serial support / Prolific PL2303 Driver Date: Mon, 08 Apr 2013 19:35:49 +0200 Message-ID: <5162FFF5.6040403@gmail.com> References: <20130408150351.GA13824@kroah.com> <1365433602.618685252@f30.mail.ru> <20130408160351.GB12665@kroah.com> <20130408162945.GA26133@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-lb0-f171.google.com ([209.85.217.171]:44585 "EHLO mail-lb0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760775Ab3DHRfy (ORCPT ); Mon, 8 Apr 2013 13:35:54 -0400 Received: by mail-lb0-f171.google.com with SMTP id v10so6008470lbd.30 for ; Mon, 08 Apr 2013 10:35:52 -0700 (PDT) In-Reply-To: <20130408162945.GA26133@kroah.com> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Greg KH Cc: Alexander Shiyan , linux-serial@vger.kernel.org On 2013-04-08 6:29, Greg KH wrote: > On Mon, Apr 08, 2013 at 06:20:23PM +0200, Hans Beck=E9rus wrote: >> Sure, dmesg will show me the details, but I would really like to hav= e >> it in real-time ;) Actually when I set console=3DttyUSB0,115200 all = I >> get is the prompt :( Nothing comes out from the boot, and it does no= t >> seem to act as a real console either since any thing that usually po= ps >> up there are only showing in dmesg now. Do I need to configure the >> kernel in some specific way to support USB console mode? > You do have: > CONFIG_USB_SERIAL_CONSOLE > enabled, right? Hmm. Coming to think about it, no ;) Will try it first thing tomorrow! Thanks. > USB starts as one of the last things in the kernel boot process, so t= he > best you can ever get is a summary of what happened during the boot, = not > the kernel boot messages as they happen because they happen before th= e > USB device is initialized. Sure. That is an acceptable limitation. However, I wonder if this will=20 be different once we get U-Boot USB console support on this platform? Question though is if Linux ever will be able to benefit from a first=20 stage driver already being kicked-off by U-Boot. Hans -- To unsubscribe from this list: send the line "unsubscribe linux-serial"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html