linux-kernel - Re: [PATCH v3 1/2] dt-bindings: riscv: fix underscore requirement for multi-letter extensions

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Date:   Tue, 6 Dec 2022 07:06:53 -0600
From:   Rob Herring <robh@...nel.org>
To:     Conor Dooley <conor@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Guo Ren <guoren@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Heiko Stuebner <heiko@...ech.de>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Andrew Jones <ajones@...tanamicro.com>,
        linux-riscv@...ts.infradead.org, Rob Herring <robh+dt@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Jessica Clarke <jrtc27@...c27.com>
Subject: Re: [PATCH v3 1/2] dt-bindings: riscv: fix underscore requirement
 for multi-letter extensions


On Mon, 05 Dec 2022 17:44:59 +0000, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@...rochip.com>
> 
> The RISC-V ISA Manual allows the first multi-letter extension to avoid
> a leading underscore. Underscores are only required between multi-letter
> extensions.
> 
> The dt-binding does not validate that a multi-letter extension is
> canonically ordered, as that'd need an even worse regex than is here,
> but it should not fail validation for valid ISA strings.
> 
> Allow the first multi-letter extension to appear immediately after
> the single-letter extensions.
> 
> Link: https://github.com/riscv/riscv-isa-manual/releases/tag/riscv-unpriv-pdf-from-asciidoc-15112022 # Chapter 29.5
> Fixes: 299824e68bd0 ("dt-bindings: riscv: add new riscv,isa strings for emulators")
> Acked-by: Guo Ren <guoren@...nel.org>
> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
>  Documentation/devicetree/bindings/riscv/cpus.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Acked-by: Rob Herring <robh@...nel.org>