[PATCH v7 1/5] dt-bindings: arm: coresight-tnoc: Bind on platform bus instead of AMBA

[Jie Gan <jie.gan@oss.qualcomm.com>]

The Aggregator TraceNoC hardware exposes CID registers, but the Component
ID value returned by the hardware is 0x00000000 instead of a valid AMBA
Component ID. As a result, the device cannot be identified on the AMBA
bus.

Describe the Aggregator TraceNoC with a dedicated single
"qcom,coresight-tnoc" compatible instead of the two-string AMBA form
"qcom,coresight-tnoc", "arm,primecell". This creates the device on the
platform bus so it is bound by the platform driver through its compatible
string rather than as an AMBA device.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
---
 .../devicetree/bindings/arm/qcom,coresight-tnoc.yaml     | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml
index 37147124449e..625801e3d3bb 100644
--- a/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml
@@ -22,24 +22,12 @@ description: >
 
   Note this binding is specifically intended for Aggregator TNOC instances.
 
-# Need a custom select here or 'arm,primecell' will match on lots of nodes
-select:
-  properties:
-    compatible:
-      contains:
-        enum:
-          - qcom,coresight-tnoc
-  required:
-    - compatible
-
 properties:
   $nodename:
     pattern: "^tn(@[0-9a-f]+)$"
 
   compatible:
-    items:
-      - const: qcom,coresight-tnoc
-      - const: arm,primecell
+    const: qcom,coresight-tnoc
 
   reg:
     maxItems: 1
@@ -83,7 +71,7 @@ additionalProperties: false
 examples:
   - |
     tn@109ab000 {
-      compatible = "qcom,coresight-tnoc", "arm,primecell";
+      compatible = "qcom,coresight-tnoc";
       reg = <0x109ab000 0x4200>;
 
       clocks = <&aoss_qmp>;

-- 
2.34.1