From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755690AbbJUPgI (ORCPT ); Wed, 21 Oct 2015 11:36:08 -0400 Received: from mail-qk0-f182.google.com ([209.85.220.182]:35605 "EHLO mail-qk0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755660AbbJUPgD (ORCPT ); Wed, 21 Oct 2015 11:36:03 -0400 Subject: Re: [PATCH v2 2/2] serial: earlycon: allow to specify uartclk in earlycon kernel-parameter To: Masahiro Yamada References: <1445312189-28876-1-git-send-email-yamada.masahiro@socionext.com> <1445312189-28876-3-git-send-email-yamada.masahiro@socionext.com> <5626491A.8040908@hurleysoftware.com> <562784AB.4040709@hurleysoftware.com> Cc: Rob Herring , Stefan Agner , linux-serial@vger.kernel.org, Greg Kroah-Hartman , Linux Kernel Mailing List , Jiri Slaby From: Peter Hurley Message-ID: <5627B0DC.6000700@hurleysoftware.com> Date: Wed, 21 Oct 2015 11:35:56 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: 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 Hi Masahiro, On 10/21/2015 11:31 AM, Masahiro Yamada wrote: > If it is always correct to preserve the initialization done by boot-loader, > the following code in 8250_early.c does not make sense. It's not always correct to preserve the initialization by the bootloader. For example, on my legacy x86 workstation, the bootloader does not initialize the h/w so when I want 8250 earlycon, I must specify the baud rate. Regards, Peter Hurley