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[PATCH 1/3] dt-bindings: arm: qcom: Add Coresight Interconnect TNOC

Yuanfang Zhang posted 3 patches 5 months, 3 weeks ago
There is a newer version of this series
[PATCH 1/3] dt-bindings: arm: qcom: Add Coresight Interconnect TNOC
Posted by Yuanfang Zhang 5 months, 3 weeks ago 
Add device tree binding for Qualcomm Coresight Interconnect Trace
Netwrok On Chip (ITNOC). This TNOC acts as a CoreSight
graph link that forwards trace data from a subsystem to the
Aggregator TNOC, without aggregation or ATID functionality.

Signed-off-by: Yuanfang Zhang <yuanfang.zhang@oss.qualcomm.com>
---
 .../bindings/arm/qcom,coresight-itnoc.yaml         | 108 +++++++++++++++++++++
 1 file changed, 108 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..fd224e07ce68918b453210763aacda585d5a5ca2
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml
@@ -0,0 +1,108 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/qcom,coresight-itnoc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Interconnect Trace Network On Chip - ITNOC
+
+maintainers:
+  - Yuanfang Zhang <yuanfang.zhang@oss.qualcomm.com>
+
+description: |
+  The Interconnect TNOC is a CoreSight graph link that forwards trace data
+  from a subsystem to the Aggregator TNOC. Compared to Aggregator TNOC, it
+  does not have aggregation and ATID functionality.
+
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - qcom,coresight-itnoc
+  required:
+    - compatible
+
+properties:
+  $nodename:
+    pattern: "^tnoc(@[0-9a-f]+)?$"
+
+  compatible:
+    items:
+      - const: qcom,coresight-itnoc
+
+  reg:
+    maxItems: 1
+    description: Base address and size of the ITNOC registers.
+
+  clock-names:
+    items:
+      - const: apb
+
+  clocks:
+    maxItems: 1
+
+  in-ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      '#address-cells':
+        const: 1
+      '#size-cells':
+        const: 0
+
+    patternProperties:
+      '^port(@[0-9a-f]{1,2})?$':
+        description: Input connections from CoreSight Trace Bus
+        $ref: /schemas/graph.yaml#/properties/port
+    additionalProperties: false
+
+  out-ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port:
+        description: out connections to aggregator TNOC
+        $ref: /schemas/graph.yaml#/properties/port
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - in-ports
+  - out-ports
+
+additionalProperties: false
+
+examples:
+  - |
+    tnoc@109ac000 {
+        compatible = "qcom,coresight-itnoc";
+        reg = <0x109ac000 0x1000>;
+
+        clocks = <&aoss_qmp>;
+        clock-names = "apb";
+
+        in-ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            port@0 {
+                reg = <0>;
+                tn_ic_in_tpdm_dcc: endpoint {
+                    remote-endpoint = <&tpdm_dcc_out_tn_ic>;
+                };
+            };
+        };
+
+        out-ports {
+            port {
+                tn_ic_out_tnoc_aggr: endpoint {
+                    /* to Aggregator TNOC input */
+                    remote-endpoint = <&tn_ag_in_tn_ic>;
+                };
+            };
+        };
+    };
+...

-- 
2.34.1
Re: [PATCH 1/3] dt-bindings: arm: qcom: Add Coresight Interconnect TNOC
Posted by Krzysztof Kozlowski 5 months, 3 weeks ago 
On 15/08/2025 15:18, Yuanfang Zhang wrote:
> Add device tree binding for Qualcomm Coresight Interconnect Trace
> Netwrok On Chip (ITNOC). This TNOC acts as a CoreSight
> graph link that forwards trace data from a subsystem to the
> Aggregator TNOC, without aggregation or ATID functionality.
> 
> Signed-off-by: Yuanfang Zhang <yuanfang.zhang@oss.qualcomm.com>
> ---
>  .../bindings/arm/qcom,coresight-itnoc.yaml         | 108 +++++++++++++++++++++
>  1 file changed, 108 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..fd224e07ce68918b453210763aacda585d5a5ca2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml
> @@ -0,0 +1,108 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/arm/qcom,coresight-itnoc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Interconnect Trace Network On Chip - ITNOC
> +
> +maintainers:
> +  - Yuanfang Zhang <yuanfang.zhang@oss.qualcomm.com>
> +
> +description: |

Do not need '|' unless you need to preserve formatting.

> +  The Interconnect TNOC is a CoreSight graph link that forwards trace data
> +  from a subsystem to the Aggregator TNOC. Compared to Aggregator TNOC, it
> +  does not have aggregation and ATID functionality.
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - qcom,coresight-itnoc
> +  required:
> +    - compatible

Why all this? Drop

> +
> +properties:
> +  $nodename:
> +    pattern: "^tnoc(@[0-9a-f]+)?$"

Why are you requiring a non-generic name?

> +
> +  compatible:
> +    items:

No need for items

> +      - const: qcom,coresight-itnoc
> +
> +  reg:
> +    maxItems: 1
> +    description: Base address and size of the ITNOC registers.

Drop, redundant

> +
> +  clock-names:
> +    items:
> +      - const: apb

Drop clock-names, obvious. Also, odd order - names are never before
actual property.

> +
> +  clocks:
> +    maxItems: 1
> +
> +  in-ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      '#address-cells':
> +        const: 1
> +      '#size-cells':
> +        const: 0
> +
> +    patternProperties:
> +      '^port(@[0-9a-f]{1,2})?$':

Why do you have here 255 ports?

> +        description: Input connections from CoreSight Trace Bus
> +        $ref: /schemas/graph.yaml#/properties/port
> +    additionalProperties: false

This goes after $ref

> +
> +  out-ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port:
> +        description: out connections to aggregator TNOC
> +        $ref: /schemas/graph.yaml#/properties/port
> +    additionalProperties: false

This goes after ref

> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names

And here different order... Be consistent. See also DTS coding style.

> +  - in-ports
> +  - out-ports
> +
> +additionalProperties: false
> +



Best regards,
Krzysztof
Re: [PATCH 1/3] dt-bindings: arm: qcom: Add Coresight Interconnect TNOC
Posted by yuanfang zhang 5 months, 3 weeks ago 
On 8/16/2025 4:33 PM, Krzysztof Kozlowski wrote:
> On 15/08/2025 15:18, Yuanfang Zhang wrote:
>> Add device tree binding for Qualcomm Coresight Interconnect Trace
>> Netwrok On Chip (ITNOC). This TNOC acts as a CoreSight
>> graph link that forwards trace data from a subsystem to the
>> Aggregator TNOC, without aggregation or ATID functionality.
>>
>> Signed-off-by: Yuanfang Zhang <yuanfang.zhang@oss.qualcomm.com>
>> ---
>>  .../bindings/arm/qcom,coresight-itnoc.yaml         | 108 +++++++++++++++++++++
>>  1 file changed, 108 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml
>> new file mode 100644
>> index 0000000000000000000000000000000000000000..fd224e07ce68918b453210763aacda585d5a5ca2
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-itnoc.yaml
>> @@ -0,0 +1,108 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/arm/qcom,coresight-itnoc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm Interconnect Trace Network On Chip - ITNOC
>> +
>> +maintainers:
>> +  - Yuanfang Zhang <yuanfang.zhang@oss.qualcomm.com>
>> +
>> +description: |
> Do not need '|' unless you need to preserve formatting.
sure, will remove it.
>> +  The Interconnect TNOC is a CoreSight graph link that forwards trace data
>> +  from a subsystem to the Aggregator TNOC. Compared to Aggregator TNOC, it
>> +  does not have aggregation and ATID functionality.
>> +
>> +select:
>> +  properties:
>> +    compatible:
>> +      contains:
>> +        enum:
>> +          - qcom,coresight-itnoc
>> +  required:
>> +    - compatible
> Why all this? Drop
sure.
>> +
>> +properties:
>> +  $nodename:
>> +    pattern: "^tnoc(@[0-9a-f]+)?$"
> Why are you requiring a non-generic name?
will update the name.
>> +
>> +  compatible:
>> +    items:
> No need for items
sure, will remove it.
>> +      - const: qcom,coresight-itnoc
>> +
>> +  reg:
>> +    maxItems: 1
>> +    description: Base address and size of the ITNOC registers.
> Drop, redundant
sure, will remove it.
>> +
>> +  clock-names:
>> +    items:
>> +      - const: apb
> Drop clock-names, obvious. Also, odd order - names are never before
> actual property.
sure, will update the order.
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  in-ports:
>> +    $ref: /schemas/graph.yaml#/properties/ports
>> +
>> +    properties:
>> +      '#address-cells':
>> +        const: 1
>> +      '#size-cells':
>> +        const: 0
>> +
>> +    patternProperties:
>> +      '^port(@[0-9a-f]{1,2})?$':
> Why do you have here 255 ports?
It supports a maximum of 256 input ports, so it is limited to 0-255.
>> +        description: Input connections from CoreSight Trace Bus
>> +        $ref: /schemas/graph.yaml#/properties/port
>> +    additionalProperties: false
> This goes after $ref
sure, will update.
>> +
>> +  out-ports:
>> +    $ref: /schemas/graph.yaml#/properties/ports
>> +
>> +    properties:
>> +      port:
>> +        description: out connections to aggregator TNOC
>> +        $ref: /schemas/graph.yaml#/properties/port
>> +    additionalProperties: false
> This goes after ref
sure, will update.
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
> And here different order... Be consistent. See also DTS coding style.
sure, will update the order.
>> +  - in-ports
>> +  - out-ports
>> +
>> +additionalProperties: false
>> +
>
>
> Best regards,
> Krzysztof

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