From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King Subject: Re: Controlling the serial port at kernel level Date: Thu, 2 May 2002 21:09:26 +0100 Sender: linux-serial-owner@vger.kernel.org Message-ID: <20020502210926.H24630@flint.arm.linux.org.uk> References: <11E89240C407D311958800A0C9ACF7D13A77CF@EXCHANGE> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <11E89240C407D311958800A0C9ACF7D13A77CF@EXCHANGE>; from EdV@macrolink.com on Thu, May 02, 2002 at 11:31:45AM -0700 List-Id: linux-serial@vger.kernel.org To: Ed Vance Cc: antonelloderosa@inwind.it, "'root@chaos.analogic.com'" , 'linux-serial' , 'linux-kernel' 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