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dt-bindings: arm: Adds CoreSight TPDA hardware definitions
Adds new coresight-tpda.yaml file describing the bindings required to define tpda in the device trees. Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com> Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20230117145708.16739-8-quic_jinlmao@quicinc.com
This commit is contained in:
Mao Jinlong
Suzuki K Poulose
parent
5b7916625c
commit
a8fbe1442c
2 changed files with 130 additions and 1 deletions
129
Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
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Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
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# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
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# Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/arm/qcom,coresight-tpda.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Trace, Profiling and Diagnostics Aggregator - TPDA
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description: |
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TPDAs are responsible for packetization and timestamping of data sets
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utilizing the MIPI STPv2 packet protocol. Pulling data sets from one or
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more attached TPDM and pushing the resultant (packetized) data out a
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master ATB interface. Performing an arbitrated ATB interleaving (funneling)
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task for free-flowing data from TPDM (i.e. CMB and DSB data set flows).
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There is no strict binding between TPDM and TPDA. TPDA can have multiple
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TPDMs connect to it. But There must be only one TPDA in the path from the
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TPDM source to TMC sink. TPDM can directly connect to TPDA's inport or
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connect to funnel which will connect to TPDA's inport.
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We can use the commands are similar to the below to validate TPDMs.
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Enable coresight sink first.
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echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
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echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
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echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
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echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
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The test data will be collected in the coresight sink which is enabled.
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If rwp register of the sink is keeping updating when do integration_test
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(by cat tmc_etf0/mgmt/rwp), it means there is data generated from TPDM
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to sink.
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maintainers:
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- Mao Jinlong <quic_jinlmao@quicinc.com>
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- Tao Zhang <quic_taozha@quicinc.com>
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# Need a custom select here or 'arm,primecell' will match on lots of nodes
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select:
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properties:
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compatible:
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contains:
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enum:
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- qcom,coresight-tpda
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required:
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- compatible
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properties:
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$nodename:
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pattern: "^tpda(@[0-9a-f]+)$"
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compatible:
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items:
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- const: qcom,coresight-tpda
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- const: arm,primecell
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reg:
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minItems: 1
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maxItems: 2
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clocks:
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maxItems: 1
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clock-names:
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items:
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- const: apb_pclk
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in-ports:
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type: object
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description: |
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Input connections from TPDM to TPDA
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$ref: /schemas/graph.yaml#/properties/ports
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out-ports:
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type: object
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description: |
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Output connections from the TPDA to legacy CoreSight trace bus.
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$ref: /schemas/graph.yaml#/properties/ports
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properties:
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port:
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description:
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Output connection from the TPDA to legacy CoreSight Trace bus.
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$ref: /schemas/graph.yaml#/properties/port
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- in-ports
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- out-ports
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additionalProperties: false
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examples:
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# minimum tpda definition.
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- |
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tpda@6004000 {
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compatible = "qcom,coresight-tpda", "arm,primecell";
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reg = <0x6004000 0x1000>;
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clocks = <&aoss_qmp>;
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clock-names = "apb_pclk";
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in-ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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tpda_qdss_0_in_tpdm_dcc: endpoint {
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remote-endpoint =
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<&tpdm_dcc_out_tpda_qdss_0>;
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};
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};
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};
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out-ports {
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port {
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tpda_qdss_out_funnel_in0: endpoint {
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remote-endpoint =
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<&funnel_in0_in_tpda_qdss>;
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};
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};
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};
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};
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...
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@ -2124,7 +2124,7 @@ S: Maintained
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T: git git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git
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F: Documentation/ABI/testing/sysfs-bus-coresight-devices-*
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F: Documentation/devicetree/bindings/arm/arm,coresight-*.yaml
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F: Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
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F: Documentation/devicetree/bindings/arm/qcom,coresight-*.yaml
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F: Documentation/devicetree/bindings/arm/arm,embedded-trace-extension.yaml
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F: Documentation/devicetree/bindings/arm/arm,trace-buffer-extension.yaml
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F: Documentation/trace/coresight/*
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