Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754131AbaG2P1S (ORCPT ); Tue, 29 Jul 2014 11:27:18 -0400 Received: from mail-vc0-f181.google.com ([209.85.220.181]:51115 "EHLO mail-vc0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753789AbaG2P1O convert rfc822-to-8bit (ORCPT ); Tue, 29 Jul 2014 11:27:14 -0400 MIME-Version: 1.0 In-Reply-To: <53D79AD3.8020700@suse.de> References: <1405704009-8430-1-git-send-email-afaerber@suse.de> <1405704009-8430-4-git-send-email-afaerber@suse.de> <53D79AD3.8020700@suse.de> Date: Tue, 29 Jul 2014 08:27:13 -0700 X-Google-Sender-Auth: hWkjrymmw22ryYQwtMj8yxxAXgA Message-ID: Subject: Re: [PATCH v2 3/4] ARM: dts: exynos5250: Fold common ChromeOS parts into Snow From: Doug Anderson To: =?UTF-8?Q?Andreas_F=C3=A4rber?= Cc: Javier Martinez Canillas , "linux-samsung-soc@vger.kernel.org" , Stephan van Schaik , Vincent Palatin , Ben Dooks , Kukjin Kim , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Russell King , "moderated list:ARM/SAMSUNG ARM A..." , "open list:OPEN FIRMWARE AND..." , open list Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andreas, On Tue, Jul 29, 2014 at 6:00 AM, Andreas Färber wrote: > Hi Javier and Doug, > > Am 25.07.2014 19:02, schrieb Javier Martinez Canillas: >> On Fri, Jul 25, 2014 at 6:43 PM, Doug Anderson wrote: >>> On Fri, Jul 25, 2014 at 9:35 AM, Javier Martinez Canillas >>> wrote: >>>> Hello Andreas, >>>> >>>> On Fri, Jul 18, 2014 at 7:20 PM, Andreas Färber wrote: >>>>> >>>>> + memory { >>>>> + reg = <0x40000000 0x80000000>; >>>>> + }; >>>>> + >>>>> + chosen { >>>>> + }; >>>>> + >>>> >>>> Is there a reason for an empty chosen node? Same for the Spring DTS. >>> >>> I know that the bootloader (U-Boot) fills this in. I'd have to double >>> check how the bootloader handles the node not being there to begin >>> with. >> >> Yes, U-Boot fills this but if the node does not exist in the FDT, it >> creates one. Take a look at fdt_chosen() in common/fdt_support.c [0]. >> >> So I think it's better to just remove it since is empty. > > Hm, in different context it was stated that device trees shouldn't rely > on bootloader behavior (for a /memory node on Zynq we ended up > specifying the size cell with the real value despite U-Boot overriding > it to a lesser value). > > Can we instead settle on filling this node with defaults? :) > bootargs = "console=tty1"; would be my choice for Spring. Would that be > applicable for Snow as well? Personally I think that there's not a lot of use for including bootargs. Every single person will need different bootargs since everyone will have a different boot source (eMMC partitioin 0, eMMC partition3, SD card, USB, etc). You have to rely on the bootloader for _something_. > Not sure how to specify that via linux,stdout-path property. > > I believe this would be a follow-up patch either way. Right > Since there's at least two series out there trying to fiddle with > -cros-common.dtsi, including one that drops the slot sub-node of the MMC > and one that adds CPU power supply, it would be nice if we can get the > -cros-common parts sorted out and applied. Can you ack/review 1-2? > Should I squash them in a v3? Yeah, it will be a fight to see who gets landed first... :-P I was thinking you were going to spin the patches and I'd do another batch of review, but I think I can mark the first two as Reveiwed-by if it's helpful to you. Let me do one more double-check when I get to my desk. -Doug -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/