[PATCH 1/2] dt-bindings: interrupt-controller: gicv5: Relax IRS properties constraints

[Lorenzo Pieralisi]

An IRS is architecturally allowed to be stand-alone (ie with no direct
CPU connection).

Relax "cpus" and "arm,iaffids" properties constraints allowing a standalone
IRS configuration.

Fixes: 7d7299bd07c6 ("dt-bindings: interrupt-controller: Add Arm GICv5")
Signed-off-by: Lorenzo Pieralisi <lpieralisi at kernel.org>
Cc: Rob Herring <robh at kernel.org>
Cc: Marc Zyngier <maz at kernel.org>
---
I have not marked the patch for stable though I think it should go
to stable kernels to fix the original schema. I am a bit nervous about
making cpus and arm,iaffids optional but I don't think there is a way
to keep them required and force them to be empty for an IRS with
no CPU connection.
---
 .../devicetree/bindings/interrupt-controller/arm,gic-v5.yaml     | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v5.yaml b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v5.yaml
index 86ca7f3ac281..b901e4288816 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v5.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v5.yaml
@@ -120,13 +120,14 @@ patternProperties:
 
       cpus:
         description:
-          CPUs managed by the IRS.
+          CPUs managed by the IRS. Omit it if the IRS has no associated CPUs.
 
       arm,iaffids:
         $ref: /schemas/types.yaml#/definitions/uint16-array
         description:
           Interrupt AFFinity ID (IAFFID) associated with the CPU whose
           CPU node phandle is at the same index in the cpus array.
+          Omit it if the IRS has no associated CPUs.
 
     patternProperties:
       "^its@[0-9a-f]+$":
@@ -210,12 +211,14 @@ patternProperties:
           - reg
           - reg-names
 
+    dependencies:
+      cpus: [ "arm,iaffids" ]
+      arm,iaffids: [ cpus ]
+
     required:
       - compatible
       - reg
       - reg-names
-      - cpus
-      - arm,iaffids
 
 additionalProperties: false
 

-- 
2.53.0