Subject: [PATCH v4 03/10] dt-bindings: apple, aic: Add affinity description for per-cpu pseudo-interrupts

From: Marc Zyngier <[email-masked]>
Date: Mon, 24 Jan 2022 20:12:24 +0000

Some of the FIQ per-cpu pseudo-interrupts are better described with
a specific affinity, the most obvious candidate being the CPU PMUs.

Augment the AIC binding to be able to specify that affinity in the
interrupt controller node.

Signed-off-by: Marc Zyngier <[email-masked]>
---
 .../interrupt-controller/apple,aic.yaml       | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml b/Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml
index c7577d401786..d97683eb2c54 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml
@@ -70,6 +70,33 @@ properties:
   power-domains:
     maxItems: 1
 
+  affinities:
+    type: object
+    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
+        properties:
+          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:
+          - fiq-index
+          - cpus
+
 required:
   - compatible
   - '#interrupt-cells'
-- 
2.30.2

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