[PATCH v2 02/17] dt-bindings: riscv: Add xtheadvector ISA extension description

[Charlie Jenkins]

The xtheadvector ISA extension is described on the T-Head extension spec
Github page [1] at commit 95358cb2cca9.

Link: https://github.com/T-head-Semi/thead-extension-spec/blob/95358cb2cca9489361c61d3
35e03d3134b14133f/xtheadvector.adoc [1]

Signed-off-by: Charlie Jenkins <charlie at rivosinc.com>
---
 Documentation/devicetree/bindings/riscv/extensions.yaml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index 468c646247aa..99d2a9e8c52d 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -477,6 +477,10 @@ properties:
             latency, as ratified in commit 56ed795 ("Update
             riscv-crypto-spec-vector.adoc") of riscv-crypto.
 
+        # vendor extensions, each extension sorted alphanumerically under the
+        # vendor they belong to. Vendors are sorted alphanumerically as well.
+
+        # Andes
         - const: xandespmu
           description:
             The Andes Technology performance monitor extension for counter overflow
@@ -484,5 +488,11 @@ properties:
             Registers in the AX45MP datasheet.
             https://www.andestech.com/wp-content/uploads/AX45MP-1C-Rev.-5.0.0-Datasheet.pdf
 
+        # T-HEAD
+        - const: xtheadvector
+          description:
+            The T-HEAD specific 0.7.1 vector implementation as written in
+            https://github.com/T-head-Semi/thead-extension-spec/blob/95358cb2cca9489361c61d335e03d3134b14133f/xtheadvector.adoc.
+
 additionalProperties: true
 ...

-- 
2.44.0