From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Wed, 01 Jun 2016 09:49:51 +0200 Subject: [PATCH] ARM: uniphier: drop code for old DT binding In-Reply-To: References: <1464682628-12163-1-git-send-email-yamada.masahiro@socionext.com> <4992506.m4GEHIOqdc@wuerfel> Message-ID: <6243293.lmvRqvQAd6@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wednesday, June 1, 2016 3:30:03 PM CEST Masahiro Yamada wrote: > Hi Arnd. > > 2016-05-31 18:21 GMT+09:00 Arnd Bergmann : > > On Tuesday, May 31, 2016 5:17:08 PM CEST Masahiro Yamada wrote: > >> Commit 307d40c56b0c ("ARM: uniphier: rework SMP code to support new > >> System Bus binding") added a new DT binding for SMP code, but still > >> kept old code for the backward compatibility. > >> > >> Linux 4.6 was out with both bindings supported, so it should not > >> hurt to drop the old code now. > >> > >> Signed-off-by: Masahiro Yamada > >> > > > > That explanation is in general not sufficient. Are you sure that > > nobody is shipping a machine with their own dts file that is not > > merged upstream, and that there are no bootloaders that have a > > hardcoded dtb file that we need to support indefinitely? > > > > I have to confess that almost no one (except me) uses this upstreamed > code directly. > It can boot, but it is almost useless for practical uses (at least for > production level) > because it still lacks lots of drivers. > > Our products based on ARM 32bit SoCs were shipped with old kernel > (without device tree) that were never upstreamed. That's fine, a lot of companies work like this when the upstreaming starts, just mention this in the changelog. > Socionext is now trying to change the development procedure > and the situation will be much better for ARM64 SoC products; it will be > more community-based development, although they are not shipped yet. > > So, the answer is, nobody is shipping ARM32 products using this upstream code. > Device Tree is not used in the first place. > (But, I still believe I should keep upstreaming.) Ok. Arnd