[PATCH v4 4/4] dt-bindings: riscv: isa string bonus content

[Conor Dooley]

From: Conor Dooley <conor.dooley at microchip.com>

**NOT FOR CONSIDERATION**

I figured, sure why not add the strings for version number validation,
just in case we need them in the future. The commented out string is
considered by dt-schema to be "not a regex", but regex101 thinks it
is... Maybe dt-schema does not support named match groups, but they
are the only way that I could trivially find to make this somewhat
manageable. Either way, it is permissive so it allows combinations
of "M", "MpM" & no number.

Not-signed-off-by: Conor Dooley <conor.dooley at microchip.com>
---
 Documentation/devicetree/bindings/riscv/cpus.yaml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index 90a7cabf58fe..6c725d067846 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -80,7 +80,11 @@ properties:
       insensitive, letters in the riscv,isa string must be all
       lowercase to simplify parsing.
     $ref: "/schemas/types.yaml#/definitions/string"
-    pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:_[hsxz](?:[a-z])+)*$
+    oneOf:
+      - pattern: ^rv(?:64|32)imaf?d?q?c?b?v?k?h?(?:_[hsxz](?:[a-z])+)*$
+      - pattern: ^rv(?:64|32)(?:i\d+)(?:m\d+)(?:a\d+)(?:f\d+)?(?:d\d+)?(?:q\d+)?(?:c\d+)?(?:b\d+)?(?:v\d+)?(?:k\d+)?(?:h\d+)?(?:(?:_[zsh][imafdqcbvksh]|_x)(?:[a-z])+\d+)*$
+      - pattern: ^rv(?:64|32)(?:i\d+p\d+)(?:m\d+p\d+)(?:a\d+p\d+)(?:f\d+p\d+)?(?:d\d+p\d+)?(?:q\d+p\d+)?(?:c\d+p\d+)?(?:b\d+p\d+)?(?:v\d+p\d+)?(?:k\d+p\d+)?(?:h\d+p\d+)?(?:(?:_[zsh][imafdqcbvksh]|_x)(?:[a-z])+(?:\d+p\d+))*$
+#      - pattern: ^rv(?:64|32)(?:i(?<num>(?:\d+|\d+p\d+)?)?)(?:m(?:\k<num>)?)(?:a(?:\k<num>)?)(?:f(?:\k<num>)?)?(?:d(?:\k<num>)?)?(?:q(?:\k<num>)?)?(?:c(?:\k<num>)?)?(?:b(?:\k<num>)?)?(?:v(?:\k<num>)?)?(?:k(?:\k<num>)?)?(?:h(?:\k<num>)?)?(?:(?:_[zsh][imafdqcbvksh]|_x)(?:[a-z])*(?:\d+|\d+p\d+)?)+$
 
   # RISC-V requires 'timebase-frequency' in /cpus, so disallow it here
   timebase-frequency: false
-- 
2.37.1