[PATCH v2 1/2] dt-bindings: riscv: fix underscore requirement for addtional standard extensions
From: Conor Dooley
Date: Wed Nov 30 2022 - 13:05:10 EST
From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
The RISC-V ISA Manual allows for the first Additional Standard
Extension having no leading underscore. Only if there are multiple
Additional Standard Extensions is it needed to have an underscore.
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 Z multi-letter extension to appear immediately prior
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@xxxxxxxxxx>
Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/riscv/cpus.yaml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index 90a7cabf58fe..e80c967a4fa4 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -80,7 +80,7 @@ properties:
insensitive, letters in the riscv,isa string must be all
lowercase to simplify parsing.
$ref: "/schemas/types.yaml#/definitions/string"
- pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:_[hsxz](?:[a-z])+)*$
+ pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:z(?:[a-z])+)?(?:_[hsxz](?:[a-z])+)*$
# RISC-V requires 'timebase-frequency' in /cpus, so disallow it here
timebase-frequency: false
--
2.38.1