[PATCH v17 7/9] dt-bindings: arm: Adds CoreSight TPDA hardware definitions

[Mao Jinlong]

Adds new coresight-tpda.yaml file describing the bindings required
to define tpda in the device trees.

Acked-by: Suzuki K Poulose <suzuki.poulose at arm.com>
Reviewed-by: Rob Herring <robh at kernel.org>
Reviewed-by: Mike Leach <mike.leach at linaro.org>
Signed-off-by: Tao Zhang <quic_taozha at quicinc.com>
Signed-off-by: Mao Jinlong <quic_jinlmao at quicinc.com>
---
 .../bindings/arm/qcom,coresight-tpda.yaml     | 129 ++++++++++++++++++
 MAINTAINERS                                   |   2 +-
 2 files changed, 130 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml

diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
new file mode 100644
index 000000000000..2ec9b5b24d73
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
@@ -0,0 +1,129 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+# Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/qcom,coresight-tpda.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Trace, Profiling and Diagnostics Aggregator - TPDA
+
+description: |
+  TPDAs are responsible for packetization and timestamping of data sets
+  utilizing the MIPI STPv2 packet protocol. Pulling data sets from one or
+  more attached TPDM and pushing the resultant (packetized) data out a
+  master ATB interface. Performing an arbitrated ATB interleaving (funneling)
+  task for free-flowing data from TPDM (i.e. CMB and DSB data set flows).
+
+  There is no strict binding between TPDM and TPDA. TPDA can have multiple
+  TPDMs connect to it. But There must be only one TPDA in the path from the
+  TPDM source to TMC sink. TPDM can directly connect to TPDA's inport or
+  connect to funnel which will connect to TPDA's inport.
+
+  We can use the commands are similar to the below to validate TPDMs.
+  Enable coresight sink first.
+
+  echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
+  echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
+  echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
+  echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
+
+  The test data will be collected in the coresight sink which is enabled.
+  If rwp register of the sink is keeping updating when do integration_test
+  (by cat tmc_etf0/mgmt/rwp), it means there is data generated from TPDM
+  to sink.
+
+maintainers:
+  - Mao Jinlong <quic_jinlmao at quicinc.com>
+  - Tao Zhang <quic_taozha at quicinc.com>
+
+# Need a custom select here or 'arm,primecell' will match on lots of nodes
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - qcom,coresight-tpda
+  required:
+    - compatible
+
+properties:
+  $nodename:
+    pattern: "^tpda(@[0-9a-f]+)$"
+  compatible:
+    items:
+      - const: qcom,coresight-tpda
+      - const: arm,primecell
+
+  reg:
+    minItems: 1
+    maxItems: 2
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: apb_pclk
+
+  in-ports:
+    type: object
+    description: |
+      Input connections from TPDM to TPDA
+    $ref: /schemas/graph.yaml#/properties/ports
+
+  out-ports:
+    type: object
+    description: |
+      Output connections from the TPDA to legacy CoreSight trace bus.
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port:
+        description:
+          Output connection from the TPDA to legacy CoreSight Trace bus.
+        $ref: /schemas/graph.yaml#/properties/port
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - in-ports
+  - out-ports
+
+additionalProperties: false
+
+examples:
+  # minimum tpda definition.
+  - |
+    tpda at 6004000 {
+       compatible = "qcom,coresight-tpda", "arm,primecell";
+       reg = <0x6004000 0x1000>;
+
+       clocks = <&aoss_qmp>;
+       clock-names = "apb_pclk";
+
+       in-ports {
+         #address-cells = <1>;
+         #size-cells = <0>;
+
+        port at 0 {
+          reg = <0>;
+          tpda_qdss_0_in_tpdm_dcc: endpoint {
+            remote-endpoint =
+              <&tpdm_dcc_out_tpda_qdss_0>;
+            };
+        };
+      };
+
+       out-ports {
+         port {
+                 tpda_qdss_out_funnel_in0: endpoint {
+                    remote-endpoint =
+                    <&funnel_in0_in_tpda_qdss>;
+                  };
+          };
+       };
+    };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index b11d0540bb9d..d8343cde1924 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2124,7 +2124,7 @@ S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git
 F:	Documentation/ABI/testing/sysfs-bus-coresight-devices-*
 F:	Documentation/devicetree/bindings/arm/arm,coresight-*.yaml
-F:	Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
+F:	Documentation/devicetree/bindings/arm/qcom,coresight-*.yaml
 F:	Documentation/devicetree/bindings/arm/arm,embedded-trace-extension.yaml
 F:	Documentation/devicetree/bindings/arm/arm,trace-buffer-extension.yaml
 F:	Documentation/trace/coresight/*
-- 
2.39.0