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Subject[PATCH v4 1/4] dt-bindings: arm: Add remote etm dt-binding
Date
Remote ETM(Embedded Trace Macrocell) is to capture information of
the executed processor instructions of remote processors like modem.
Add new coresight-remote-etm.yaml file describing the bindings
required to define coresight remote etm in the device trees.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com>
---
.../arm/qcom,coresight-remote-etm.yaml | 51 +++++++++++++++++++
1 file changed, 51 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml

diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml
new file mode 100644
index 000000000000..4fd5752978cd
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-remote-etm.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/qcom,coresight-remote-etm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Coresight Remote ETM(Embedded Trace Macrocell)
+
+maintainers:
+ - Jinlong Mao <quic_jinlmao@quicinc.com>
+ - Tao Zhang <quic_taozha@quicinc.com>
+
+description:
+ Support for ETM trace collection on remote processor using coresight
+ framework. Enabling this will allow turning on ETM tracing on remote
+ processor like modem processor via sysfs and collecting the trace
+ via coresight TMC sinks.
+
+properties:
+ compatible:
+ const: qcom,coresight-remote-etm
+
+ 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
+ - out-ports
+
+additionalProperties: false
+
+examples:
+ - |
+ etm {
+ compatible = "qcom,coresight-remote-etm";
+
+ out-ports {
+ port {
+ modem_etm0_out_funnel_modem: endpoint {
+ remote-endpoint = <&funnel_modem_in_modem_etm0>;
+ };
+ };
+ };
+ };
+...
--
2.41.0
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