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[V9,1/2] dt-bindings: firmware: qcom,scm: Add optional interrupt

Message ID 20230113065303.17727-2-quic_sibis@quicinc.com
State Superseded
Headers show
Series SCM: Add support for wait-queue aware firmware | expand

Commit Message

Sibi Sankar Jan. 13, 2023, 6:53 a.m. UTC 
From: Guru Das Srinagesh <quic_gurus@quicinc.com>

Add an interrupt specification to the bindings to support the wait-queue
feature on SM8450 SoCs.

Signed-off-by: Guru Das Srinagesh <quic_gurus@quicinc.com>
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---

The interrupt property for scm firmware from a binding perspective is
completely optional i.e. not all tz fw running in the wild on sm8450
devices support this feature. The bootloader does the interrupt property
addition on sm8450 devices with wait-queue support.

v7
- Pick up R-b.

v6:
- Fix subject of bindings [Krzysztof]
- Update commit message to include the SoC supporting the feature [Krzysztof]
- Make the interrupt property valid on SM8450 SoC [Krzysztof]
- Rebased on Krzysztof's narrow clocks and interconnect series.
- Drop R-b

v5:
- Pick up R-b

v4:
- Qualify bindings [Krzysztoff]

 .../devicetree/bindings/firmware/qcom,scm.yaml | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
index 8e6e9ebb343d..01c861f36983 100644
--- a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
+++ b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
@@ -73,6 +73,12 @@  properties:
   '#reset-cells':
     const: 1
 
+  interrupts:
+    description:
+      The wait-queue interrupt that firmware raises as part of handshake
+      protocol to handle sleeping SCM calls.
+    maxItems: 1
+
   qcom,dload-mode:
     $ref: /schemas/types.yaml#/definitions/phandle-array
     items:
@@ -162,6 +168,18 @@  allOf:
       properties:
         interconnects: false
 
+  # Interrupts
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - qcom,scm-sm8450
+    then:
+      properties:
+        interrupts: false
+
 required:
   - compatible