From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965197AbXCGMyb (ORCPT ); Wed, 7 Mar 2007 07:54:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965225AbXCGMyb (ORCPT ); Wed, 7 Mar 2007 07:54:31 -0500 Received: from nf-out-0910.google.com ([64.233.182.184]:21010 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965197AbXCGMy3 (ORCPT ); Wed, 7 Mar 2007 07:54:29 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=EdJR7GT5nkubKKB1tpSVCq+Akx+C30r+VOtZ6zh9Qv9T2QSfIN9DdDHM/Assr72N8cAy/GTSmbMRtj5K+OS8c5005hg9vV8Xab3UAwM9YegQSHu+scONFXGIvwbjAZeIMSUY96vHG4XQYgDiEswN5XMsqRuhBPO4KZOf1b//s5g= Message-ID: <57354eff0703070454u24e97309j55ec9de584ced71e@mail.gmail.com> Date: Wed, 7 Mar 2007 13:54:28 +0100 From: "Oleksiy Kebkal" To: "Robin Getz" Subject: Re: should RTS init in serial core be tied to CRTSCTS Cc: "Krzysztof Halasa" , "Mike Frysinger" , rmk@arm.linux.org.uk, "Linux Kernel Mailing List" , linux-serial@vger.kernel.org In-Reply-To: <200703061824.08834.rgetz@blackfin.uclinux.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <8bd0f97a0703011603m794e00f5x875eb68ad0db05de@mail.gmail.com> <200703061824.08834.rgetz@blackfin.uclinux.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > it's used for > > various purposes such as providing +12V to the device (and two pins > > can supply more power than one - sure, it isn't the best idea). > > I understand - the request wasn't to change the default operation - just add a > method of controlling things, so those minority of people who want the > control can have it. There are two parts of at least my request. The first part is, why should serial driver assert RTS when CRTSCTS is not set and which problem may follow by changing this default behaviour. The second part is that you are talking about. I don't see for a moment some regular way to preconfigure serial interface parameters before opening the device, at the same time current behaviour creates potentially dangerous RTS jerking during device configuring. May be it would be good idea to develop some tty control driver which provides a possibility to change default setting of the drivers? -Oleksiy