[RFC PATCH 1/3] dt-bindings: riscv: Add Sspesa and Ssplcofi extensions

Document the RISC-V Performance Event Sampling extensions Sspesa
(Precise Event Sample Attribution) and Ssplcofi (Precise Local Counter
Overflow Interrupt) in the ISA extensions binding.

Add a dependency rule requiring Sspesa to be present whenever Ssplcofi
is present.

Signed-off-by: Mayuresh Chitale <[email protected]>
---
 .../devicetree/bindings/riscv/extensions.yaml | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index 5ffc40d599c0..f316b93754ff 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -232,6 +232,18 @@ properties:
             ratified at commit d70011dde6c2 ("Update to ratified state")
             of riscv-j-extension.
 
+        - const: sspesa
+          description: |
+            The standard Sspesa supervisor-level extension for precise event
+            sample attribution, as defined in the RISC-V Performance Event
+            Sampling specification.
+
+        - const: ssplcofi
+          description: |
+            The standard Ssplcofi supervisor-level extension for precise local
+            counter overflow interrupts, as defined in the RISC-V Performance
+            Event Sampling specification. Ssplcofi depends on Sspesa.
+
         - const: ssstateen
           description: |
             The standard Ssstateen extension for supervisor-mode view of the
@@ -934,6 +946,13 @@ properties:
                 const: smnpm
             - contains:
                 const: ssnpm
+      # Ssplcofi depends on Sspesa
+      - if:
+          contains:
+            const: ssplcofi
+        then:
+          contains:
+            const: sspesa
       # Za64rs and Ziccrse depend on Zalrsc or A
       - if:
           contains:
-- 
2.43.0


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