From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from outbound-mail-106.bluehost.com (outbound-mail-106.bluehost.com [69.89.22.6]) by ozlabs.org (Postfix) with SMTP id 59C11DDDA0 for ; Tue, 12 May 2009 03:01:41 +1000 (EST) Message-ID: <4A085862.5070303@dlasys.net> Date: Mon, 11 May 2009 12:54:58 -0400 From: "David H. Lynch Jr." MIME-Version: 1.0 To: Timur Tabi Subject: Re: device trees. References: <4A0457BC.3040408@dlasys.net> <1242007203.7767.28.camel@concordia> <4A07C664.6040609@dlasys.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Timur Tabi wrote: > On Mon, May 11, 2009 at 1:32 AM, David H. Lynch Jr. wrote: > > So all you need to do is have your boot loader create a device tree > from scratch. If you're using U-Boot, then you can already do this by > making the appropriate libfdt calls. Otherwise, you should probably > add libfdt to your boot loader. > As I mentioned before, we do nto use u-boot. I am not looking to start a debate on it either, but it does not meet a number of our needs, and would require significant architectural changes to do so. The difference between it and devicetrees is that u-boot is avaiable to us if we want, I did port u-boot to our hardware at one point and it did everything it promised, but u-boot is optional, device trees are not. I do not have to re-architect u-boot to fit into 16k of bram, or load bit files or ..... If I want to move past 2.6.26 I have to not only use device trees but actually make them work in a way that will function as we need with our systems. It is likely I will use libdft as a starting point, but I can not see it as more than a short term solution. libdft is orders of magnitude large than our entire monitor, and it is a toolkit rather than the whole solution. -- Dave Lynch DLA Systems Software Development: Embedded Linux 717.627.3770 dhlii@dlasys.net http://www.dlasys.net fax: 1.253.369.9244 Cell: 1.717.587.7774 Over 25 years' experience in platforms, languages, and technologies too numerous to list. "Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction." Albert Einstein