From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: [PATCH 09/32] bcm2837-rpi-3-b.dts for 32bit arm Date: Thu, 02 Jun 2016 17:11:31 +0200 Message-ID: <1464880291.24775.111.camel@redhat.com> References: <1464817421-8519-1-git-send-email-kraxel@redhat.com> <3336185.FIBLI6ezsy@wuerfel> <1464858870.24775.65.camel@redhat.com> <4795604.XAe8xnhung@wuerfel> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Return-path: In-Reply-To: <4795604.XAe8xnhung@wuerfel> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Arnd Bergmann Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Mark Rutland , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Pawel Moll , Ian Campbell , Russell King , open list , Eric Anholt , Rob Herring , linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Kumar Gala List-Id: devicetree@vger.kernel.org Hi, > > > > Reference to ../../../arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts > > > > directly in the Makefile? Actually tried that, and to my surprise this worked fine for both "make dtbs" and "make dtbs_install". So we should just do that I guess ... > > Yes, in theory. No, in practice. As far I know the rpi3 is the only > > 64bit soc where a almost identical 32bit version exists, so running > > 32bit kernels on a 64bit processor actually happens in practice and I > > expect this to continue. If you want create sdcard images which run on > > any rpi variant this is pretty much the only reasonable way to do it. > > I think the Allwinner A64 and the Samsung s5p6818 are other examples > for this, where the initial run of boards all run 32-bit kernels > for much of the same reasons. If users want to run a 32-bit distro > on rpi-3 and on e.g. orange-pi, I don't see why they wouldn't also run > the same binary on A64. ... and others can join the party on a case-by-case basis. I still expect for the majority of arm64 boards it is not very useful, so I don't think we should build all of them unconditionally. cheers, Gerd -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html