dt-bindings: soc: qcom,rpmh-rsc: Limit power-domains requirement

Certain platforms (such as Chrome SDM845 and SC7180 with a TF-A running
as secure firmware) do not have a OSI-mode capable PSCI implementation.

That in turn means the PSCI-associated power domain which represents the
system's power state can't provide enough feedback to the RSC device.

Don't require power-domains on platforms where this may be the case.

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250327-topic-more_dt_bindings_fixes-v2-1-b763d958545f@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,rpmh-rsc.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,rpmh-rsc.yaml
index af632d0e0355c56748ecac24f528dc2eec7d1193..036562eb5140c78c10d845fd6efe42470b41895c 100644 (file)
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,rpmh-rsc.yaml
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,rpmh-rsc.yaml
@@ -44,7 +44,13 @@ description: |
 
 properties:
   compatible:
-    const: qcom,rpmh-rsc
+    oneOf:
+      - items:
+          - enum:
+              - qcom,sc7180-rpmh-apps-rsc
+              - qcom,sdm845-rpmh-apps-rsc
+          - const: qcom,rpmh-rsc
+      - const: qcom,rpmh-rsc
 
   interrupts:
     minItems: 1
@@ -124,7 +130,21 @@ required:
   - qcom,tcs-offset
   - reg
   - reg-names
-  - power-domains
+
+allOf:
+  # Some platforms may lack a OSI-mode PSCI implementation, which implies the
+  # system power domain can't provide feedback about entering power collapse
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - qcom,sc7180-rpmh-apps-rsc
+                - qcom,sdm845-rpmh-apps-rsc
+    then:
+      required:
+        - power-domains
 
 additionalProperties: false