From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: [PATCH] tty/serial: add support for Xilinx PS UART Date: Tue, 19 Apr 2011 16:21:41 -0700 Message-ID: <20110419232141.GA27491@kroah.com> References: <20110419221530.7370d013@lxorguk.ukuu.org.uk> <8d05c32c-9ff1-4eda-9563-6857ede6541a@VA3EHSMHS020.ehs.local> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from kroah.org ([198.145.64.141]:52411 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751945Ab1DSXWO (ORCPT ); Tue, 19 Apr 2011 19:22:14 -0400 Content-Disposition: inline In-Reply-To: <8d05c32c-9ff1-4eda-9563-6857ede6541a@VA3EHSMHS020.ehs.local> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: John Linn Cc: Alan Cox , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org On Tue, Apr 19, 2011 at 04:22:00PM -0600, John Linn wrote: > > -----Original Message----- > > From: Alan Cox [mailto:alan@lxorguk.ukuu.org.uk] > > Sent: Tuesday, April 19, 2011 3:16 PM > > To: John Linn > > Cc: linux-kernel@vger.kernel.org; linux-serial@vger.kernel.org > > Subject: Re: [PATCH] tty/serial: add support for Xilinx PS UART > > > > On Tue, 19 Apr 2011 14:14:52 -0600 > > John Linn wrote: > > > > > The Xilinx PS Uart is used on the new ARM based SoC. This > > > UART is not compatible with others such that a seperate > > > driver is required. > > > > Joyous. I wish people would standardise. > > > > > + 213 = /dev/ttyPS0 Xilinx PS serial port 0 > > > + 214 = /dev/ttyPS1 Xilinx PS serial port 1 > > > + 215 = /dev/ttyPS2 Xilinx PS serial port 2 > > > + 216 = /dev/ttyPS3 Xilinx PS serial port 3 > > > > Is there a specific reason you need fixed minor numbers ? If not > please > > use a dynamic range and keep Linus happy. > > Hi Alan, > > I hope you don't mind me asking a bit more to better understand. Here's > my > concerns (maybe not valid). > > It seems like since this is a console it can get hard to debug with > dynamic > nodes for this driver. > > This driver is for an embedded device where we don't want to require > udev > or mdev to assign nodes. Why not use devtmpfs? There's no need to use udev or mdev at all. thanks, greg k-h