linux-kernel - Re: [PATCH 3/4] arm64: dts: exynos: make tm2 and tm2e independent from each other

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Date:   Tue, 03 Jan 2017 19:25:48 +0900
From:   Andi Shyti <andi.shyti@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Jaechul Lee <jcsing.lee@...sung.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Kukjin Kim <kgene@...nel.org>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>, beomho.seo@...sung.com,
        galaxyra@...il.com, linux-arm-kernel@...ts.infradead.org,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH 3/4] arm64: dts: exynos: make tm2 and tm2e independent from
 each other

> >> > Currently tm2e dts includes tm2 but there are some differences
> >> > between the two boards and tm2 has some properties that tm2e
> >> > doesn't have.
> >> >
> >> > That's why it's important to keep the two dts files independent
> >> > and put all the commonalities in a tm2-common.dtsi file.
> >> >
> >> > Signed-off-by: Andi Shyti <andi.shyti@...sung.com>
> >> > Signed-off-by: Jaechul Lee <jcsing.lee@...sung.com>
> >> > ---
> >> >  .../boot/dts/exynos/exynos5433-tm2-common.dtsi     | 1046 ++++++++++++++++++++
> >> >  arch/arm64/boot/dts/exynos/exynos5433-tm2.dts      | 1033 +------------------
> >> >  arch/arm64/boot/dts/exynos/exynos5433-tm2e.dts     |    2 +-
> >> >  3 files changed, 1049 insertions(+), 1032 deletions(-)
> >> >  create mode 100644 arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
> >>
> >> I would like to see here the rename and diff from it. Not entire delta
> >> (deletions and addons). It is not possible to compare it... I think
> >> git supports it by default with similarity of 50%.
> >
> > I understand, it's indeed quite cryptic to understand. But all
> > the diff algorithms (patience, minimal, histogram, myers) give
> > the same result. I don't know how to make it better.
> >
> > I could split this patch, but this also means breaking tm2's
> > functionality, which looks worse.
> >
> > Please tell me if you know a better way for generating the patch.
> 
> git format-patch -M95%?

Same thing with all M values.

Because exynos5433-tm2.dts results modified, while
exynos5433-tm2-common.dtsi is new. Even though I did:

1. mv exynos5433-tm2.dts exynos5433-tm2-common.dtsi
2. copied pieces from exynos5433-tm2-common.dtsi to a new
   exynos5433-tm2.dts

Andi