linux-kernel - [PATCH 0/2] riscv: dts: Add "b" ISA extension to existing devicetrees

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Message-Id: <20260113-adding-b-dtsi-v1-0-22d6e55d19df@riscstar.com>
Date: Tue, 13 Jan 2026 15:45:52 +0800
From: Guodong Xu <guodong@...cstar.com>
To: 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>, 
 Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Chen Wang <unicorn_wang@...look.com>, Inochi Amaoto <inochiama@...il.com>, 
 Yixun Lan <dlan@...too.org>
Cc: Palmer Dabbelt <palmer@...osinc.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, Guodong Xu <guodong@...cstar.com>
Subject: [PATCH 0/2] riscv: dts: Add "b" ISA extension to existing
 devicetrees

The RISC-V "b" (Bit-manipulation) extension was ratified in April 2024,
much later than its component extensions zba/zbb/zbs (June 2021). Recent
updates to the device tree bindings [2] enforce that when all three
component extensions are present, "b" must also be specified. Related
discussion can also be found in [1].

Patch 1 clarifies the ISA spec version for canonical ordering in uabi.rst.
It is a trivial update, but can help readers reference the correct
document version.

Patch 2 adds "b" after "c" in 3 device tree files (anlogic, sophgo and
spacemit), fixing the related dtbs_check warnings.

This patchset is based on top of linux-next, tag: next-20260109, and
depends on [2].

Link: https://lore.kernel.org/all/20251230-imprison-sleet-6b5a1e26d34b@spud/ [1]
Link: https://lore.kernel.org/all/20260110-k3-basic-dt-v4-0-d492f3a30ffa@riscstar.com/ [2]

Signed-off-by: Guodong Xu <guodong@...cstar.com>
---
Guodong Xu (2):
      Documentation: riscv: uabi: Clarify ISA spec version for canonical order
      riscv: dts: Add "b" ISA extension to existing devicetrees

 Documentation/arch/riscv/uabi.rst           |   4 +-
 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 ++--
 4 files changed, 150 insertions(+), 147 deletions(-)
---
base-commit: 31d167f54de93f14fa8e4bc6cbc4adaf7019fd94
change-id: 20260113-adding-b-dtsi-148714533f07
prerequisite-message-id: <20260110-k3-basic-dt-v4-0-d492f3a30ffa@...cstar.com>
prerequisite-patch-id: 0c859b4d131b3360875c795c6148c6176b55fb91
prerequisite-patch-id: 2ed98dc1ab0f5ed923cc252415c345dc8caf6f17
prerequisite-patch-id: 1be1a031763fac029076a768f012af31e455be66
prerequisite-patch-id: 21bb8387c946e050910440e7a7622305d46d946d
prerequisite-patch-id: f3bdc2c74b230663710086bd770a755d56cb8b9c
prerequisite-patch-id: 1f162c02f8bdb5bbc8ce52ead4fcb76258f5c2b9
prerequisite-patch-id: 76e1ff26c2f1fe4019cfa574942b568000e6ca1f
prerequisite-patch-id: 77ddc9e5dc85495adc803cdc605bdda2ddc7fa47
prerequisite-patch-id: a75c798383b46a14d40436357c769c3671184768
prerequisite-patch-id: 781fc10dcae2c38c84c25bee887ef7474786dd36
prerequisite-patch-id: 5be5d3e62aa73024bf9e1de6aad155be6d618f40

Best regards,
-- 
Guodong Xu <guodong@...cstar.com>