From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 2 May 2002 16:09:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 2 May 2002 16:09:36 -0400 Received: from caramon.arm.linux.org.uk ([212.18.232.186]:55824 "EHLO caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP id ; Thu, 2 May 2002 16:09:34 -0400 Date: Thu, 2 May 2002 21:09:26 +0100 From: Russell King To: Ed Vance Cc: antonelloderosa@inwind.it, "'root@chaos.analogic.com'" , "'linux-serial'" , "'linux-kernel'" Subject: Re: Controlling the serial port at kernel level Message-ID: <20020502210926.H24630@flint.arm.linux.org.uk> In-Reply-To: <11E89240C407D311958800A0C9ACF7D13A77CF@EXCHANGE> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 02, 2002 at 11:31:45AM -0700, Ed Vance wrote: > That will get the UART initialized and held in an > operational state while you program the MCR register from inside > the kernel to change the modem signal states. You don't need the UART initialised to wiggle the RTS and DTR signals - as far as standard ports go (rather than the fancy ones that do flow control), they're just simple IO lines. -- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html