dt-bindings: arm: Add support for DSB element size

Add property "qcom,dsb-elem-size" to support DSB(Discrete Single
Bit) element for TPDM. The associated aggregator will read this
size before it is enabled. DSB element size currently only
supports 32-bit and 64-bit.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-3-git-send-email-quic_taozha@quicinc.com

Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml

@@ -44,6 +44,14 @@ properties:
     minItems: 1
     maxItems: 2
 
+  qcom,dsb-element-size:
+    description:
+      Specifies the DSB(Discrete Single Bit) element size supported by
+      the monitor. The associated aggregator will read this size before it
+      is enabled. DSB element size currently only supports 32-bit and 64-bit.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [32, 64]
+
   clocks:
     maxItems: 1
 
@@ -77,6 +85,8 @@ examples:
       compatible = "qcom,coresight-tpdm", "arm,primecell";
       reg = <0x0684c000 0x1000>;
 
+      qcom,dsb-element-size = /bits/ 8 <32>;
+
       clocks = <&aoss_qmp>;
       clock-names = "apb_pclk";