On Wed, Dec 23, 2020 at 03:33:38PM +0530, Anshuman Khandual wrote:
From: Suzuki K Poulose suzuki.poulose@arm.com
Document the device tree bindings for Embedded Trace Extensions. ETE can be connected to legacy coresight components and thus could optionally contain a connection graph as described by the CoreSight bindings.
Cc: devicetree@vger.kernel.org Cc: Mathieu Poirier mathieu.poirier@linaro.org Cc: Mike Leach mike.leach@linaro.org Cc: Rob Herring robh@kernel.org Signed-off-by: Suzuki K Poulose suzuki.poulose@arm.com Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com
Documentation/devicetree/bindings/arm/ete.txt | 41 +++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/ete.txt
Bindings are in schema format now, please convert this.
diff --git a/Documentation/devicetree/bindings/arm/ete.txt b/Documentation/devicetree/bindings/arm/ete.txt new file mode 100644 index 0000000..b52b507 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/ete.txt @@ -0,0 +1,41 @@ +Arm Embedded Trace Extensions
+Arm Embedded Trace Extensions (ETE) is a per CPU trace component that +allows tracing the CPU execution. It overlaps with the CoreSight ETMv4 +architecture and has extended support for future architecture changes. +The trace generated by the ETE could be stored via legacy CoreSight +components (e.g, TMC-ETR) or other means (e.g, using a per CPU buffer +Arm Trace Buffer Extension (TRBE)). Since the ETE can be connected to +legacy CoreSight components, a node must be listed per instance, along +with any optional connection graph as per the coresight bindings. +See bindings/arm/coresight.txt.
+** ETE Required properties:
+- compatible : should be one of:
- "arm,embedded-trace-extensions"
+- cpu : the CPU phandle this ETE belongs to.
If this is 1:1 with CPUs, then perhaps it should be a child node of the CPU nodes.
+** Optional properties: +- CoreSight connection graph, see bindings/arm/coresight.txt.
+** Example:
+ete_0 {
- compatible = "arm,embedded-trace-extension";
- cpu = <&cpu_0>;
+};
+ete_1 {
- compatible = "arm,embedded-trace-extension";
- cpu = <&cpu_1>;
- out-ports { /* legacy CoreSight connection */
port {ete1_out_port: endpoint@0 {remote-endpoint = <&funnel_in_port0>;};};- };
+};
2.7.4