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Message-ID: <20230117145708.16739-8-quic_jinlmao@quicinc.com>
Date: Tue, 17 Jan 2023 06:57:06 -0800
From: Mao Jinlong <quic_jinlmao@...cinc.com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>,
Suzuki K Poulose <suzuki.poulose@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Konrad Dybcio <konradybcio@...il.com>,
Mike Leach <mike.leach@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: Mao Jinlong <quic_jinlmao@...cinc.com>,
Leo Yan <leo.yan@...aro.org>,
"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
<coresight@...ts.linaro.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
Tingwei Zhang <quic_tingweiz@...cinc.com>,
Yuanfang Zhang <quic_yuanfang@...cinc.com>,
Tao Zhang <quic_taozha@...cinc.com>,
Trilok Soni <quic_tsoni@...cinc.com>,
Hao Zhang <quic_hazha@...cinc.com>,
<linux-arm-msm@...r.kernel.org>,
Bjorn Andersson <andersson@...nel.org>,
Rob Herring <robh@...nel.org>
Subject: [PATCH v17 7/9] 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@....com>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Mike Leach <mike.leach@...aro.org>
Signed-off-by: Tao Zhang <quic_taozha@...cinc.com>
Signed-off-by: Mao Jinlong <quic_jinlmao@...cinc.com>
---
.../bindings/arm/qcom,coresight-tpda.yaml | 129 ++++++++++++++++++
MAINTAINERS | 2 +-
2 files changed, 130 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
new file mode 100644
index 000000000000..2ec9b5b24d73
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/qcom,coresight-tpda.yaml
@@ -0,0 +1,129 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+# Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/qcom,coresight-tpda.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Trace, Profiling and Diagnostics Aggregator - TPDA
+
+description: |
+ TPDAs are responsible for packetization and timestamping of data sets
+ utilizing the MIPI STPv2 packet protocol. Pulling data sets from one or
+ more attached TPDM and pushing the resultant (packetized) data out a
+ master ATB interface. Performing an arbitrated ATB interleaving (funneling)
+ task for free-flowing data from TPDM (i.e. CMB and DSB data set flows).
+
+ There is no strict binding between TPDM and TPDA. TPDA can have multiple
+ TPDMs connect to it. But There must be only one TPDA in the path from the
+ TPDM source to TMC sink. TPDM can directly connect to TPDA's inport or
+ connect to funnel which will connect to TPDA's inport.
+
+ We can use the commands are similar to the below to validate TPDMs.
+ Enable coresight sink first.
+
+ echo 1 > /sys/bus/coresight/devices/tmc_etf0/enable_sink
+ echo 1 > /sys/bus/coresight/devices/tpdm0/enable_source
+ echo 1 > /sys/bus/coresight/devices/tpdm0/integration_test
+ echo 2 > /sys/bus/coresight/devices/tpdm0/integration_test
+
+ The test data will be collected in the coresight sink which is enabled.
+ If rwp register of the sink is keeping updating when do integration_test
+ (by cat tmc_etf0/mgmt/rwp), it means there is data generated from TPDM
+ to sink.
+
+maintainers:
+ - Mao Jinlong <quic_jinlmao@...cinc.com>
+ - Tao Zhang <quic_taozha@...cinc.com>
+
+# Need a custom select here or 'arm,primecell' will match on lots of nodes
+select:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - qcom,coresight-tpda
+ required:
+ - compatible
+
+properties:
+ $nodename:
+ pattern: "^tpda(@[0-9a-f]+)$"
+ compatible:
+ items:
+ - const: qcom,coresight-tpda
+ - const: arm,primecell
+
+ reg:
+ minItems: 1
+ maxItems: 2
+
+ clocks:
+ maxItems: 1
+
+ clock-names:
+ items:
+ - const: apb_pclk
+
+ in-ports:
+ type: object
+ description: |
+ Input connections from TPDM to TPDA
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ out-ports:
+ type: object
+ description: |
+ Output connections from the TPDA to legacy CoreSight trace bus.
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ properties:
+ port:
+ description:
+ Output connection from the TPDA to legacy CoreSight Trace bus.
+ $ref: /schemas/graph.yaml#/properties/port
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - in-ports
+ - out-ports
+
+additionalProperties: false
+
+examples:
+ # minimum tpda definition.
+ - |
+ tpda@...4000 {
+ compatible = "qcom,coresight-tpda", "arm,primecell";
+ reg = <0x6004000 0x1000>;
+
+ clocks = <&aoss_qmp>;
+ clock-names = "apb_pclk";
+
+ in-ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ tpda_qdss_0_in_tpdm_dcc: endpoint {
+ remote-endpoint =
+ <&tpdm_dcc_out_tpda_qdss_0>;
+ };
+ };
+ };
+
+ out-ports {
+ port {
+ tpda_qdss_out_funnel_in0: endpoint {
+ remote-endpoint =
+ <&funnel_in0_in_tpda_qdss>;
+ };
+ };
+ };
+ };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index b11d0540bb9d..d8343cde1924 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2124,7 +2124,7 @@ S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git
F: Documentation/ABI/testing/sysfs-bus-coresight-devices-*
F: Documentation/devicetree/bindings/arm/arm,coresight-*.yaml
-F: Documentation/devicetree/bindings/arm/qcom,coresight-tpdm.yaml
+F: Documentation/devicetree/bindings/arm/qcom,coresight-*.yaml
F: Documentation/devicetree/bindings/arm/arm,embedded-trace-extension.yaml
F: Documentation/devicetree/bindings/arm/arm,trace-buffer-extension.yaml
F: Documentation/trace/coresight/*
--
2.39.0
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