linux-kernel - Re: [PATCH 2/2] riscv: dts: Add "b" ISA extension to existing devicetrees

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Message-ID: <CAH1PCMarzrZJ072iyAQthB-i-LHFCSJ+tZLx6HcWiVcUrQeafw@mail.gmail.com>
Date: Wed, 14 Jan 2026 10:33:34 +0800
From: Guodong Xu <guodong@...cstar.com>
To: Conor Dooley <conor@...nel.org>, Yixun Lan <dlan@...too.org>
Cc: Jonathan Corbet <corbet@....net>, Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, 
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>, 
	Conor Dooley <conor.dooley@...rochip.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Chen Wang <unicorn_wang@...look.com>, 
	Inochi Amaoto <inochiama@...il.com>, Junhui Liu <junhui.liu@...moral.tech>, 
	linux-doc@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	sophgo@...ts.linux.dev, spacemit@...ts.linux.dev
Subject: Re: [PATCH 2/2] riscv: dts: Add "b" ISA extension to existing devicetrees

Hi, Conor, Yixun

On Tue, Jan 13, 2026 at 3:53 PM Yixun Lan <dlan@...too.org> wrote:
>
> Hi Guodong,
>
>
> On 15:45 Tue 13 Jan     , Guodong Xu wrote:
> > "b" is ratified (Apr/2024) much later than its components zba/zbb/zbs
> > (Jun/2021). With "b" added into riscv/extensions.yaml, a dependency
> > checking rule is now enforced, which requires that when zba, zbb, and zbs
> > are all specified, "b" must be added as well. Failing to do this will
> > cause dtbs_check schema check warnings.
> >
> > According to uabi.rst, as a single-letter extension, "b" should be added
> > after "c" in canonical order.
> >
> > Update existing devicetree files to conform to this rule. Line balancing
> > is performed where needed to improve readability.
> >
> > Signed-off-by: Guodong Xu <guodong@...cstar.com>
> > ---
> >  arch/riscv/boot/dts/anlogic/dr1v90.dtsi     |   5 +-
> >  arch/riscv/boot/dts/sophgo/sg2044-cpus.dtsi | 256 ++++++++++++++--------------
> >  arch/riscv/boot/dts/spacemit/k1.dtsi        |  32 ++--
> >  3 files changed, 147 insertions(+), 146 deletions(-)
> please have separated patch for different SoCs, so they can go via

Understand your concern.

> their own SoC tree.. thanks

Conor, is it possible to take this as one patch instead?

It fixes the same dtbs_check warnings from riscv/extensions.yaml across three
SoCs. Keeping them together maintains readability and clear tracking, IMHO.

Happy to split if needed, but wanted to check first.

Thanks,
Guodong

>
> --
> Yixun Lan (dlan)