From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Likely Subject: Re: x86 FDT and bootloader Date: Mon, 4 Jul 2011 00:51:29 -0600 Message-ID: <20110704065129.GN15152@ponder.secretlab.ca> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: Christian Gmeiner Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org List-Id: devicetree@vger.kernel.org On Fri, Jul 01, 2011 at 01:59:51PM +0200, Christian Gmeiner wrote: > Hi list, > > I am very new to device trees and have some questions. I am working on an > embedded x86 device, which has some extra chips connected to an i2c bus. > As it is not possible to probe for these devices - no ID register etc > - I am looking > into DT/FDT. > How is it possible to pass the FDT to the linux kernel via grub? How far is FDT > support for x86? I don't think any work has been done to pass DT using grub. Right now (IIRC) the DT is passed via the x86 boot protocol (Documentation/x86/boot.txt), but I don't see the device tree bits in the current mainline version of that document. g.