linux-kernel - Re: [PATCH v3 4/8] riscv: dts: sophgo: Rename cv1800b device tree file

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Message-ID: <d2b099c7-fd62-46af-b592-525b69aa8726@linaro.org>
Date:   Wed, 18 Oct 2023 14:55:09 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Inochi Amaoto <inochiama@...look.com>,
        Chao Wei <chao.wei@...hgo.com>,
        Chen Wang <unicorn_wang@...look.com>,
        Conor Dooley <conor@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>
Cc:     Jisheng Zhang <jszhang@...nel.org>,
        linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/8] riscv: dts: sophgo: Rename cv1800b device tree
 file

On 18/10/2023 14:37, Inochi Amaoto wrote:
>> On 18/10/2023 13:31, Inochi Amaoto wrote:
>>> As CV180x and CV181x have the identical layouts, it is OK to use the
>>> cv1800b basic device tree for the whole series.
>>>
>>> Signed-off-by: Inochi Amaoto <inochiama@...look.com>
>>> ---
>>>  arch/riscv/boot/dts/sophgo/{cv1800b.dtsi => cv18xx.dtsi} | 0
>>>  1 file changed, 0 insertions(+), 0 deletions(-)
>>>  rename arch/riscv/boot/dts/sophgo/{cv1800b.dtsi => cv18xx.dtsi} (100%)
>>>
>>
>> If nothing breaks by this commit, means the file is not used, so how did
>> it end up in the kernel?
>>
> 
> This commit breaks the including file cv1800b-milkv-duo.dts, which is
> fixed in the next patch. For cv1800b, it only needs to set compatible
> strings. The cv1800b and cv1812h have identical layout.

You must preserve bisectability.

> 
> I use this commit to avoid wired output provided by git and make the
> change more clear.

Don't do this. Previous patch was ok and readable. I don't understand
how this split helps (except breaking bisectability).

Best regards,
Krzysztof