linux-kernel - [PATCH v14 3/9] dt-bindings: arm: Adds CoreSight TPDM hardware

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Message-ID: <20221102091915.15281-4-quic_jinlmao@quicinc.com>
Date:   Wed, 2 Nov 2022 17:19:09 +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>,
        Konrad Dybcio <konradybcio@...il.com>,
        Mike Leach <mike.leach@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC:     Mao Jinlong <quic_jinlmao@...cinc.com>,
        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>, <devicetree@...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>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: [PATCH v14 3/9] dt-bindings: arm: Adds CoreSight TPDM hardware

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

Acked-by: Suzuki K Poulose <suzuki.poulose@....com>
Reviewed-by: Mike Leach <mike.leach@...aro.org>
Reviewed-by: Rob Herring <robh@...nel.org>
Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
Signed-off-by: Mao Jinlong <quic_jinlmao@...cinc.com>
---
 .../bindings/arm/qcom,coresight-tpdm.yaml     | 93 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 94 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml

diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
new file mode 100644
index 000000000000..5881cb41da70
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
@@ -0,0 +1,93 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+# Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/qcom,coresight-tpdm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Trace, Profiling and Diagnostics Monitor - TPDM
+
+description: |
+  The TPDM or Monitor serves as data collection component for various dataset
+  types specified in the QPMDA spec. It covers Implementation defined ((ImplDef),
+  Basic Counts (BC), Tenure Counts (TC), Continuous Multi-Bit (CMB), and Discrete
+  Single Bit (DSB). It performs data collection in the data producing clock
+  domain and transfers it to the data collection time domain, generally ATB
+  clock domain.
+
+  The primary use case of the TPDM is to collect data from different data
+  sources and send it to a TPDA for packetization, timestamping, and funneling.
+
+maintainers:
+  - Mao Jinlong <quic_jinlmao@...cinc.com>
+  - Tao Zhang <quic_taozha@...cinc.com>
+
+# Need a custom select here or 'arm,primecell' will match on lots of nodes
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - qcom,coresight-tpdm
+  required:
+    - compatible
+
+properties:
+  $nodename:
+    pattern: "^tpdm(@[0-9a-f]+)$"
+  compatible:
+    items:
+      - const: qcom,coresight-tpdm
+      - const: arm,primecell
+
+  reg:
+    minItems: 1
+    maxItems: 2
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: apb_pclk
+
+  out-ports:
+    description: |
+      Output connections from the TPDM to coresight funnel/TPDA.
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port:
+        description: Output connection from the TPDM to coresight
+            funnel/TPDA.
+        $ref: /schemas/graph.yaml#/properties/port
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  # minimum TPDM definition. TPDM connect to coresight TPDA.
+  - |
+    tpdm@...c000 {
+      compatible = "qcom,coresight-tpdm", "arm,primecell";
+      reg = <0x0684c000 0x1000>;
+
+      clocks = <&aoss_qmp>;
+      clock-names = "apb_pclk";
+
+      out-ports {
+        port {
+          tpdm_prng_out_tpda_qdss: endpoint {
+            remote-endpoint =
+              <&tpda_qdss_in_tpdm_prng>;
+          };
+        };
+      };
+    };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 379945f82a64..485b0ca691fb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2060,6 +2060,7 @@ 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/arm,embedded-trace-extension.yaml
 F:	Documentation/devicetree/bindings/arm/arm,trace-buffer-extension.yaml
 F:	Documentation/trace/coresight/*
-- 
2.17.1