From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt Subject: Re: [PATCH v2 2/2] leds/powernv: Add driver for PowerNV platform Date: Mon, 27 Apr 2015 08:08:26 +1000 Message-ID: <1430086106.16571.79.camel@kernel.crashing.org> References: <20150422234509.626d9dc7@ja.home> <55388254.4000606@linux.vnet.ibm.com> <20150423161342.55e9ac8f@ja.home> <5539D501.3040601@linux.vnet.ibm.com> <20150424121549.27b74b25@ja.home> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Received: from gate.crashing.org ([63.228.1.57]:57919 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750949AbbDZWNo (ORCPT ); Sun, 26 Apr 2015 18:13:44 -0400 In-Reply-To: <20150424121549.27b74b25@ja.home> Sender: linux-leds-owner@vger.kernel.org List-Id: linux-leds@vger.kernel.org To: Jacek Anaszewski Cc: Vasant Hegde , stewart@linux.vnet.ibm.com, cooloney@gmail.com, rpurdie@rpsys.net, linuxppc-dev@lists.ozlabs.org, linux-leds@vger.kernel.org, khandual@linux.vnet.ibm.com On Fri, 2015-04-24 at 12:15 +0200, Jacek Anaszewski wrote: > No matter what format of device tree OPAL produces, I assume that > it must compile it from some sources. Nope. Well... .C code maybe qualifies as "sources" :-) > dtb file is a compiled form of human readable dts file containing > Flattened Device Tree - a data structure for describing the hardware > in the system. > > Please refer to: http://elinux.org/Device_Tree We are quite familiar with this, guess what architecture created the whole flat device-tree stuff in the first place ? In any case, in our case, the fdt is procedurally generated by firmware. Cheers, Ben.