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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+# Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/qcom,coresight-tgu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Trigger Generation Unit - TGU
+
+description: |
+  The Trigger Generation Unit (TGU) is a Data Engine which can be utilized
+  to sense a plurality of signals and create a trigger into the CTI or
+  generate interrupts to processors. The TGU is like the trigger circuit
+  of a Logic Analyzer.The corresponding trigger logic can be realized by
+  configuring the conditions for each step after sensing the signal.
+  Once setup and enabled, it will observe sense inputs and based upon
+  the activity of those inputs, even over clock cycles, may detect a
+  preprogrammed state/sequence and then produce a trigger or interrupt.
+
+  The primary use case of the TGU is to detect patterns or sequences on a
+  given set of signals within some region of the SoC.
+
+maintainers:
+  - Mao Jinlong <quic_jinlmao@quicinc.com>
+  - Sam Chai <quic_songchai@quicinc.com>
+
+# Need a custom select here or 'arm,primecell' will match on lots of nodes
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - qcom,coresight-tgu
+  required:
+    - compatible
+
+properties:
+  $nodename:
+    pattern: "^tgu(@[0-9a-f]+)$"
+  compatible:
+    items:
+      - const: qcom,coresight-tgu
+      - const: arm,primecell
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: apb_pclk
+
+  qcom,tgu-steps:
+    description:
+      The trigger logic is realized by configuring each step after sensing
+      the signal. The parameter here is used to describe the maximum of steps
+      that could be configured in the current TGU.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 8
+
+  qcom,tgu-regs:
+    description:
+      There are some "groups" register clusters in each step, which are used to configure the signal
+      that we want to detect.Meanwhile, each group has its own priority, and the priority increases
+      with number of groups.For example, group3 has a higher priority than group2 ,the signal configured
+      in group3 will be sensed more preferentially than the signal which is configured in group2.
+      The parameter here is used to describe the signal number that each group could be configured.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 18
+
+  qcom,tgu-conditions:
+    description:
+      A condition sets a specific requirement for a step and defines the subsequent
+      action once the requirement is met. For example, in step two, if signal A is
+      detected three times, the process jumps back to step one. The parameter describes
+      the register number for each functionality, whether it is setting a specific
+      requirement or defining a subsequent action.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 4
+
+  qcom,tgu-timer-counters:
+    description:
+      TGU has timer and counter which are used to set some requirement on each step.
+      For example, we could use counter to create a trigger into CTI once TGU senses
+      the target signal three times.This parameter is used to describe the number of
+      Timers/Counters in TGU.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 2
+
+  in-ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+    additionalProperties: false
+
+    properties:
+      port:
+        description: AXI Slave connected to another Coresight component
+        $ref: /schemas/graph.yaml#/properties/port
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  # minimum TGU definition.
+  - |
+    tgu@10b0e000 {
+        compatible = "qcom,coresight-tgu", "arm,primecell";
+        reg = <0x10b0e000 0x1000>;
+
+        clocks = <&aoss_qmp>;
+        clock-names = "apb_pclk";
+
+        qcom,tgu-steps = <3>;
+        qcom,tgu-regs = <4>;
+        qcom,tgu-conditions = <4>;
+        qcom,tgu-timer-counters = <1>;
+
+        in-ports {
+            port {
+                tgu_in_tpdm_swao: endpoint{
+                    remote-endpoint = <&tpdm_swao_out_tgu>;
+                };
+            };
+        };
+    };
+...
