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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/arm,coresight-stm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Arm CoreSight System Trace MacroCell
+
+maintainers:
+ - Mathieu Poirier <mathieu.poirier@linaro.org>
+ - Mike Leach <mike.leach@linaro.org>
+ - Leo Yan <leo.yan@linaro.org>
+ - Suzuki K Poulose <suzuki.poulose@arm.com>
+
+description: |
+ CoreSight components are compliant with the ARM CoreSight architecture
+ specification and can be connected in various topologies to suit a particular
+ SoCs tracing needs. These trace components can generally be classified as
+ sinks, links and sources. Trace data produced by one or more sources flows
+ through the intermediate links connecting the source to the currently selected
+ sink.
+
+ The STM is a trace source that is integrated into a CoreSight system, designed
+ primarily for high-bandwidth trace of instrumentation embedded into software.
+ This instrumentation is made up of memory-mapped writes to the STM Advanced
+ eXtensible Interface (AXI) slave, which carry information about the behavior
+ of the software.
+
+select:
+ properties:
+ compatible:
+ contains:
+ const: arm,coresight-stm
+ required:
+ - compatible
+
+allOf:
+ - $ref: /schemas/arm/primecell.yaml#
+
+properties:
+ compatible:
+ items:
+ - const: arm,coresight-stm
+ - const: arm,primecell
+
+ reg:
+ maxItems: 2
+
+ reg-names:
+ items:
+ - const: stm-base
+ - const: stm-stimulus-base
+
+ clocks:
+ minItems: 1
+ maxItems: 2
+
+ clock-names:
+ minItems: 1
+ items:
+ - const: apb_pclk
+ - const: atclk
+
+ power-domains:
+ maxItems: 1
+
+ out-ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+ additionalProperties: false
+
+ properties:
+ port:
+ description: Output connection to the CoreSight Trace bus.
+ $ref: /schemas/graph.yaml#/properties/port
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - clocks
+ - clock-names
+ - out-ports
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ stm@20100000 {
+ compatible = "arm,coresight-stm", "arm,primecell";
+ reg = <0x20100000 0x1000>,
+ <0x28000000 0x180000>;
+ reg-names = "stm-base", "stm-stimulus-base";
+
+ clocks = <&soc_smc50mhz>;
+ clock-names = "apb_pclk";
+ out-ports {
+ port {
+ stm_out_port: endpoint {
+ remote-endpoint = <&main_funnel_in_port2>;
+ };
+ };
+ };
+ };
+...