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

[Rob Herring]

On Mon, 05 Dec 2022 17:44:59 +0000, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley at microchip.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 at kernel.org>
> Signed-off-by: Conor Dooley <conor.dooley at microchip.com>
> ---
>  Documentation/devicetree/bindings/riscv/cpus.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Acked-by: Rob Herring <robh at kernel.org>