One SDM845 board uses cx-supply, which is not allowed by the bindings,
as reported by dtbs_check:

  sdm845-samsung-starqltechn.dtb: remoteproc@5c00000 (qcom,sdm845-slpi-pas): 
Unevaluated properties are not allowed ('cx-supply' was unexpected)

The SDM845 SLPI binding already allows lcx and lmx domains, thus the
cx-supply seems like a fake name for something else, e.g. some
enable pin.  The qcom_q6v5_pas.c driver parses cx-supply, so it is an
established ABI, therefore document it for this device only.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
---
 Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml 
b/Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml
index 137f95028313..16a245fe2738 100644
--- a/Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml
@@ -32,6 +32,8 @@ properties:
   reg:
     maxItems: 1
 
+  cx-supply: true
+
   px-supply:
     description: Phandle to the PX regulator
 
@@ -159,6 +161,9 @@ allOf:
           items:
             - const: lcx
             - const: lmx
+    else:
+      properties:
+        cx-supply: false
 
   - if:
       properties:
-- 
2.51.0


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