linux-kernel - [PATCH v1 1/3] dt-bindings: arm: Add binding document for Coresight Slave Register device.

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Date: Tue, 18 Jun 2024 15:27:24 +0800
From: Jie Gan <quic_jiegan@...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: Jinlong Mao <quic_jinlmao@...cinc.com>,
        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>,
        Song Chai
	<quic_songchai@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <andersson@...nel.org>,
        <quic_yijiyang@...cinc.com>, <quic_yuanjiey@...cinc.com>,
        <quic_liuxin@...cinc.com>, <quic_yanzl@...cinc.com>,
        <quic_xinlon@...cinc.com>, <quic_xueqnie@...cinc.com>,
        <quic_sijiwu@...cinc.com>
Subject: [PATCH v1 1/3] dt-bindings: arm: Add binding document for Coresight Slave Register device.

Add binding document for Coresight Slave Register device.

Add a new property to TMC, qcom,csr-atid-offset, to indicate which
ATID registers will be used by the TMC ETR. Each TMC ETR device is
associated with four ATID registers that are continuous in address.

Signed-off-by: Jie Gan <quic_jiegan@...cinc.com>
---
 .../bindings/arm/arm,coresight-tmc.yaml       |  8 ++
 .../bindings/arm/qcom,coresight-csr.yaml      | 76 +++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-csr.yaml

diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
index cb8dceaca70e..295641a96c21 100644
--- a/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
+++ b/Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml
@@ -82,6 +82,14 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     maximum: 15
 
+  qcom,csr-atid-offset:
+    description:
+      Offset to the coresight slave register component's ATID register
+      that is used by specific TMC ETR. The ATID register can be programed according
+      to the trace id to filter out specific trace data which gets through the ETR
+      to the downstream components.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
     additionalProperties: false
diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-csr.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-csr.yaml
new file mode 100644
index 000000000000..16f97cbe3d4b
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-csr.yaml
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/qcom,coresight-csr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: CoreSight Slave Register
+
+maintainers:
+  - Yuanfang Zhang <quic_yuanfang@...cinc.com>
+  - Mao Jinlong <quic_jinlmao@...cinc.com>
+  - Jie Gan <quic_jiegan@...cinc.com>
+
+description:
+  The Coresight Slave Register controls various Coresight behaviors.
+  Used to enable/disable ETR’s data filter function based on trace ID.
+
+properties:
+  compatible:
+    const: qcom,coresight-csr
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    maxItems: 1
+    items:
+      - const: apb_pclk
+
+  reg-names:
+    items:
+      - const: csr-base
+
+  in-ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    patternProperties:
+      '^port(@[0-7])?$':
+        description: Input connections from CoreSight Trace bus
+        $ref: /schemas/graph.yaml#/properties/port
+
+required:
+  - compatible
+  - reg
+  - in-ports
+
+additionalProperties: false
+
+examples:
+  - |
+    syscon@...01000 {
+        compatible = "qcom,coresight-csr";
+        reg = <0x0 0x10001000 0x0 0x1000>;
+        reg-names = "csr-base";
+
+        in-ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+                csr_in_port0: endpoint {
+                    remote-endpoint = <&etr0_out_port>;
+                };
+            };
+
+            port@1 {
+                reg = <1>;
+                csr_in_port1: endpoint {
+                    remote-endpoint = <&etr1_out_port>;
+                };
+            };
+        };
+    };
-- 
2.34.1