From: Guodong Xu <guodong@riscstar.com>
To: Jonathan Corbet <corbet@lwn.net>, Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>,
Conor Dooley <conor.dooley@microchip.com>,
Conor Dooley <conor@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Chen Wang <unicorn_wang@outlook.com>,
Inochi Amaoto <inochiama@gmail.com>, Yixun Lan <dlan@gentoo.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: Junhui Liu <junhui.liu@pigmoral.tech>,
linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
sophgo@lists.linux.dev, spacemit@lists.linux.dev,
Guodong Xu <guodong@riscstar.com>
Subject: [PATCH v2 2/4] riscv: dts: anlogic: dr1v90: Add "b" ISA extension
Date: Thu, 15 Jan 2026 07:18:58 +0800 [thread overview]
Message-ID: <20260115-adding-b-dtsi-v2-2-254dd61cf947@riscstar.com> (raw)
In-Reply-To: <20260115-adding-b-dtsi-v2-0-254dd61cf947@riscstar.com>
"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 dr1v90.dtsi to conform to this rule. Line balancing is performed
to improve readability.
Signed-off-by: Guodong Xu <guodong@riscstar.com>
---
v2: New patch, a split from the Patch 2 in v1. This patch is for
Anlogic dr1v90.
---
arch/riscv/boot/dts/anlogic/dr1v90.dtsi | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/boot/dts/anlogic/dr1v90.dtsi b/arch/riscv/boot/dts/anlogic/dr1v90.dtsi
index a5d0765ade32..9fe183f5f5c8 100644
--- a/arch/riscv/boot/dts/anlogic/dr1v90.dtsi
+++ b/arch/riscv/boot/dts/anlogic/dr1v90.dtsi
@@ -27,8 +27,9 @@ cpu@0 {
mmu-type = "riscv,sv39";
reg = <0>;
riscv,isa-base = "rv64i";
- riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zba", "zbb", "zbc",
- "zbkc", "zbs", "zicntr", "zicsr", "zifencei",
+ riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "b",
+ "zba", "zbb", "zbc", "zbkc", "zbs",
+ "zicntr", "zicsr", "zifencei",
"zihintpause", "zihpm";
cpu0_intc: interrupt-controller {
--
2.43.0
next prev parent reply other threads:[~2026-01-14 23:19 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-14 23:18 [PATCH v2 0/4] riscv: dts: Add "b" ISA extension to existing devicetrees Guodong Xu
2026-01-14 23:18 ` [PATCH v2 1/4] Documentation: riscv: uabi: Clarify ISA spec version for canonical order Guodong Xu
2026-01-15 0:10 ` Paul Walmsley
2026-01-14 23:18 ` Guodong Xu [this message]
2026-01-15 2:25 ` [PATCH v2 2/4] riscv: dts: anlogic: dr1v90: Add "b" ISA extension Junhui Liu
2026-01-14 23:18 ` [PATCH v2 3/4] riscv: dts: sophgo: sg2044: " Guodong Xu
2026-01-15 0:28 ` Inochi Amaoto
2026-01-14 23:19 ` [PATCH v2 4/4] riscv: dts: spacemit: k1: " Guodong Xu
2026-01-15 0:39 ` Yixun Lan
2026-01-15 11:24 ` (subset) [PATCH v2 0/4] riscv: dts: Add "b" ISA extension to existing devicetrees Yixun Lan
2026-01-15 19:13 ` Conor Dooley
2026-01-15 23:04 ` Guodong Xu
2026-01-20 1:16 ` (subset) " Inochi Amaoto
2026-01-20 2:48 ` Inochi Amaoto
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