Re: [PATCH v3 1/8] dt-bindings: arm: Add support for CMB element size

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On 12/15/2023 7:19 PM, James Clark wrote:

On 21/11/2023 02:24, Tao Zhang wrote:
Add property "qcom,cmb-elem-size" to support CMB(Continuous
Multi-Bit) element for TPDM. The associated aggregator will read
this size before it is enabled. CMB element size currently only
supports 32-bit and 64-bit.

Signed-off-by: Tao Zhang <quic_taozha@xxxxxxxxxxx>
Signed-off-by: Mao Jinlong <quic_jinlmao@xxxxxxxxxxx>
---
  .../bindings/arm/qcom,coresight-tpdm.yaml     | 28 +++++++++++++++++++
  1 file changed, 28 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
index 61ddc3b5b247..0d9fe01a8b15 100644
--- a/Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
@@ -52,6 +52,15 @@ properties:
      $ref: /schemas/types.yaml#/definitions/uint8
      enum: [32, 64]
+ qcom,cmb-element-size:
+    description:
+      Specifies the CMB(Continuous Multi-Bit) element size supported by
+      the monitor. The associated aggregator will read this size before it
+      is enabled. CMB element size currently only supports 8-bit, 32-bit
+      and 64-bit.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [8, 32, 64]
+
    qcom,dsb-msrs-num:
      description:
        Specifies the number of DSB(Discrete Single Bit) MSR(mux select register)
@@ -110,4 +119,23 @@ examples:
        };
      };
+ tpdm@6c29000 {
+      compatible = "qcom,coresight-tpdm", "arm,primecell";
+      reg = <0x06c29000 0x1000>;
+      reg-names = "tpdm-base";
I think this one gives this error:

  $ make dt_binding_check DT_SCHEMA_FILES=arm/qcom,coresight

  DTC_CHK Documentation/devicetree/bindings/arm/qcom,coresight-
   tpdm.example.dtb
  qcom,coresight-tpdm.example.dtb: tpdm@6c29000: 'reg-names' does not
   match any of the regexes: 'pinctrl-[0-9]+'
         from schema $id: http://devicetree.org/schemas
         /arm/qcom,coresight-tpdm.yaml#

I will fix this in the next patch series.


Best,

Tao

+
+      qcom,cmb-element-size = /bits/ 8 <64>;
+
+      clocks = <&aoss_qmp>;
+      clock-names = "apb_pclk";
+
+      out-ports {
+        port {
+          tpdm_ipcc_out_funnel_center: endpoint {
+            remote-endpoint =
+              <&funnel_center_in_tpdm_ipcc>;
+          };
+        };
+      };
+    };
  ...




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