[PATCH v4 1/2] dt-bindings: arm: Add device Trace Network On Chip definition

[Yuanfang Zhang <quic_yuanfang@quicinc.com>]

Add a new coresight-tnoc.yaml file to describe the bindings required to
define Trace Network On Chip (TNOC) in device trees. TNOC is an
integration hierarchy which is a hardware component that integrates the
functionalities of TPDA and funnels. It collects trace form subsystems
and transfers to coresight sink.

Signed-off-by: Yuanfang Zhang <quic_yuanfang@quicinc.com>
---
 .../bindings/arm/qcom,coresight-tnoc.yaml          | 111 +++++++++++++++++++++
 1 file changed, 111 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..d07c6f2d7b949f69f9d8dd8de8664382eb39fac1
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tnoc.yaml
@@ -0,0 +1,111 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/qcom,coresight-tnoc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Trace Network On Chip - TNOC
+
+maintainers:
+  - Yuanfang Zhang <quic_yuanfang@quicinc.com>
+
+description: >
+  The Trace Network On Chip (TNOC) is an integration hierarchy hardware
+  component that integrates the functionalities of TPDA and funnels.
+
+  It sits in the different subsystem of SOC and aggregates the trace and
+  transports it to Aggregation TNOC or to coresight trace sink eventually.
+  TNOC embeds bridges for all the interfaces APB, ATB, TPDA and NTS (Narrow
+  Time Stamp).
+
+  TNOC can take inputs from different trace sources i.e. ATB, TPDM.
+
+# 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
+
+  reg:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: apb_pclk
+
+  clocks:
+    items:
+      - description: APB register access clock
+
+  in-ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    patternProperties:
+      '^port(@[0-9a-f]{1,2})?$':
+        description: Input connections from CoreSight Trace Bus
+        $ref: /schemas/graph.yaml#/properties/port
+
+  out-ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    additionalProperties: false
+
+    properties:
+      port:
+        description:
+          Output connection to CoreSight Trace Bus
+        $ref: /schemas/graph.yaml#/properties/port
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - in-ports
+  - out-ports
+
+additionalProperties: false
+
+examples:
+  - |
+    tn@109ab000  {
+      compatible = "qcom,coresight-tnoc", "arm,primecell";
+      reg = <0x109ab000 0x4200>;
+
+      clocks = <&aoss_qmp>;
+      clock-names = "apb_pclk";
+
+      in-ports {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        port@0 {
+          reg = <0>;
+
+          tn_ag_in_tpdm_gcc: endpoint {
+            remote-endpoint = <&tpdm_gcc_out_tn_ag>;
+          };
+        };
+      };
+
+      out-ports {
+        port {
+          tn_ag_out_funnel_in1: endpoint {
+            remote-endpoint = <&funnel_in1_in_tn_ag>;
+          };
+        };
+      };
+    };
+...

-- 
2.34.1