From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756822Ab1DLTjq (ORCPT ); Tue, 12 Apr 2011 15:39:46 -0400 Received: from ksp.mff.cuni.cz ([195.113.26.206]:46563 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756787Ab1DLTjo (ORCPT ); Tue, 12 Apr 2011 15:39:44 -0400 Date: Tue, 12 Apr 2011 21:39:43 +0200 From: Pavel Machek To: Andrea Adami Cc: zaurus-devel@www.linuxtogo.org, kernel list Subject: 8250 vs pxa_serial (was Re: pxa27x/spitz: serials in recent kernels) Message-ID: <20110412193943.GA30089@elf.ucw.cz> References: <20110315192111.GA2983@ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! > > I cculd not get serial port to work in recent kernels (2.6.35 was > > oldest I tried). I know they are little used but still very useful for > > debugging. > > > > Is there some special config that needs to be done? > >                                                        Pavel > > I have output on ttyS0 using the Sharp cable, never had issues. > Remember that bootloader is 9600n8 while kernels are usually 115200n8. Ok, I know what is going on. I need both PXA_SERIAL and 8250... and these two don't go well together. I tried: CONFIG_SERIAL_8250=y # CONFIG_SERIAL_8250_CONSOLE is not set CONFIG_SERIAL_8250_CS=y CONFIG_SERIAL_8250_NR_UARTS=1 CONFIG_SERIAL_8250_RUNTIME_UARTS=0 # CONFIG_SERIAL_8250_EXTENDED is not set # # Non-8250 serial port support # # CONFIG_SERIAL_MAX3100 is not set # CONFIG_SERIAL_MAX3107 is not set CONFIG_SERIAL_PXA=y CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_SERIAL_CORE=y CONFIG_SERIAL_CORE_CONSOLE=y (BTW should 8250_RUNTIME_UARTS be called "boottime uarts"? That's what help says). ...but no luck. As soon as I enable 8250, pxa serials stop working :-(. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html