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Message-ID: <beba5968-3115-3c09-cda6-67095ca55226@arm.com>
Date: Mon, 23 May 2022 10:44:36 +0100
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Mao Jinlong <quic_jinlmao@...cinc.com>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Konrad Dybcio <konradybcio@...il.com>,
Mike Leach <mike.leach@...aro.org>,
Rob Herring <robh@...nel.org>
Cc: 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,
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 <bjorn.andersson@...aro.org>
Subject: Re: [PATCH v7 08/10] dt-bindings: arm: Adds CoreSight TPDA hardware
definitions
Cc: Rob Herring
On 09/05/2022 14:39, Mao Jinlong wrote:
> Adds new coresight-tpda.yaml file describing the bindings required
> to define tpda in the device trees.
>
> 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/coresight-tpda.yaml | 119 ++++++++++++++++++
> MAINTAINERS | 1 +
> 2 files changed, 120 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/arm/coresight-tpda.yaml
>
> diff --git a/Documentation/devicetree/bindings/arm/coresight-tpda.yaml b/Documentation/devicetree/bindings/arm/coresight-tpda.yaml
> new file mode 100644
> index 000000000000..4948ac13e7f8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/coresight-tpda.yaml
> @@ -0,0 +1,119 @@
> +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
> +# Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/arm/coresight-tpda.yaml#
> +$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).
> +
> +maintainers:
> + - Mao Jinlong <quic_jinlmao@...cinc.com>
> + - Tao Zhang <quic_taozha@...cinc.com>
> +
> +properties:
> + $nodename:
> + pattern: "^tpda(@[0-9a-f]+)$"
> + compatible:
> + items:
> + - const: qcom,coresight-tpda
> + - const: arm,primecell
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + clock-names:
> + items:
> + - const: apb_pclk
> +
> + in-ports:
> + type: object
> + description: |
> + Input connections from TPDM to TPDA
> + $ref: /schemas/graph.yaml#/properties/ports
> +
--->8---
> + properties:
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + patternProperties:
> + "^port@[0-9a-f]+$":
> + type: object
> + required:
> + - reg
> +
> + required:
> + - '#size-cells'
> + - '#address-cells'
---8<---
I believe the above snippet is not needed and is covered by the generic
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>;
> +
> + qcom,tpda-atid = <65>;
> +
> + 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 28d32b3f3f5c..5d2d8c0ee340 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1978,6 +1978,7 @@ 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/coresight-cpu-debug.txt
> F: Documentation/devicetree/bindings/arm/coresight-cti.yaml
> +F: Documentation/devicetree/bindings/arm/coresight-tpda.yaml
> F: Documentation/devicetree/bindings/arm/coresight-tpdm.yaml
> F: Documentation/devicetree/bindings/arm/coresight.txt
> F: Documentation/devicetree/bindings/arm/ete.yaml
Otherwise looks good to me.
Suzuki
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