dt-bindings: apple,aic2: Add CPU PMU per-cpu pseudo-interrupts

Advertise the two pseudo-interrupts that tied to the two PMU
flavours present in the Apple M1 Pro/Max/Ultra SoC.

We choose the expose two different pseudo-interrupts to the OS
as the e-core PMU is obviously different from the p-core one,
effectively presenting two different devices.

Imported from "apple,aic".

Signed-off-by: Janne Grunau <j@jannau.net>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>

Documentation/devicetree/bindings/interrupt-controller/apple,aic2.yaml

@@ -69,6 +69,35 @@ properties:
   power-domains:
     maxItems: 1
 
+  affinities:
+    type: object
+    additionalProperties: false
+    description:
+      FIQ affinity can be expressed as a single "affinities" node,
+      containing a set of sub-nodes, one per FIQ with a non-default
+      affinity.
+    patternProperties:
+      "^.+-affinity$":
+        type: object
+        additionalProperties: false
+        properties:
+          apple,fiq-index:
+            description:
+              The interrupt number specified as a FIQ, and for which
+              the affinity is not the default.
+            $ref: /schemas/types.yaml#/definitions/uint32
+            maximum: 5
+
+          cpus:
+            $ref: /schemas/types.yaml#/definitions/phandle-array
+            description:
+              Should be a list of phandles to CPU nodes (as described in
+              Documentation/devicetree/bindings/arm/cpus.yaml).
+
+        required:
+          - apple,fiq-index
+          - cpus
+
 required:
   - compatible
   - '#interrupt-cells'