linux-kernel - [PATCH v3 09/10] dt-bindings: arm: Adds CoreSight TPDA hardware definitions

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Message-ID: <20220209105706.18852-10-quic_jinlmao@quicinc.com>
Date:   Wed, 9 Feb 2022 18:57:05 +0800
From:   Mao Jinlong <quic_jinlmao@...cinc.com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
CC:     Mao Jinlong <quic_jinlmao@...cinc.com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <coresight@...ts.linaro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Tao Zhang <quic_taozha@...cinc.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Hao Zhang <quic_hazha@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>
Subject: [PATCH v3 09/10] dt-bindings: arm: Adds CoreSight TPDA hardware definitions

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

Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
Signed-off-by: Mao Jinlong <quic_jinlmao@...cinc.com>
---
 .../bindings/arm/coresight-tpda.yaml          | 129 ++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/coresight-tpda.yaml

diff --git a/Documentation/devicetree/bindings/arm/coresight-tpda.yaml b/Documentation/devicetree/bindings/arm/coresight-tpda.yaml
new file mode 100644
index 000000000000..311a70a1fcc6
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/coresight-tpda.yaml
@@ -0,0 +1,129 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+# Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/coresight-tpda.yaml#
+$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).
+
+maintainers:
+  - Suzuki K Poulose <suzuki.poulose@....com>
+  - Mathieu Poirier <mathieu.poirier@...aro.org>
+
+properties:
+  $nodename:
+    pattern: "^tpda(@[0-9a-f]+)$"
+  compatible:
+    items:
+      - const: qcom,coresight-tpda
+      - const: arm,primecell
+
+  reg:
+    maxItems: 1
+
+  qcom,tpda-atid:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    maxItems: 1
+    description: |
+      Use the ATID field for trace source identification. This allows
+      multiple TPDMs to be interleaved and formatted via the Coresight
+      trace formatter framing protocol and de-formatted/parsed on a host
+      or debugger.
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: apb_pclk
+
+  in-ports:
+    type: object
+    description: |
+      Input connections from TPDM to TPDA
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+    patternProperties:
+      "^port@[0-9a-f]+$":
+        type: object
+        required:
+          - reg
+
+    required:
+      - '#size-cells'
+      - '#address-cells'
+
+  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
+    - qcom,tpda-atid
+    - clocks
+    - clock-names
+    - in-ports
+    - out-ports
+
+additionalProperties: false
+
+examples:
+  # minimum tpda definition.
+  - |
+    tpda@...4000 {
+       compatible = "qcom,coresight-tpda", "arm,primecell";
+       reg = <0x6004000 0x1000>;
+
+       qcom,tpda-atid = <65>;
+
+       clocks = <&aoss_qmp>;
+       clock-names = "apb_pclk";
+
+       in-ports {
+         #address-cells = <1>;
+         #size-cells = <0>;
+
+        port@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>;
+                  };
+          };
+       };
+    };
+
+...
-- 
2.17.1