Hi, As per my comments in the previous patch in this set.... On Mon, 27 Mar 2023 at 08:38, Hao Zhang <quic_hazha@xxxxxxxxxxx> wrote: > > Hi Krzysztof, > > On 3/25/2023 7:49 PM, Krzysztof Kozlowski wrote: > > On 24/03/2023 07:16, Hao Zhang wrote: > >> Add new coresight-dummy.yaml file describing the bindings required > >> to define coresight dummy trace in the device trees. > >> > > > > Subject: drop second/last, redundant "YAML schema". The "dt-bindings" > > prefix is already stating that these are bindings and all new must be DT > > schema. You cannot add anything else, so this is redundant. > > > I will take your advice to drop redundant part of title in the next > version of patch. > > > >> Signed-off-by: Hao Zhang <quic_hazha@xxxxxxxxxxx> > >> --- > >> .../bindings/arm/qcom,coresight-dummy.yaml | 118 ++++++++++++++++++ > >> 1 file changed, 118 insertions(+) > >> create mode 100644 Documentation/devicetree/bindings/arm/qcom,coresight-dummy.yaml > >> > >> diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight-dummy.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight-dummy.yaml > >> new file mode 100644 > >> index 000000000000..7b719b084d72 > >> --- /dev/null > >> +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-dummy.yaml > >> @@ -0,0 +1,118 @@ > >> +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause > >> +# Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved. > >> +%YAML 1.2 > >> +--- > >> +$id: http://devicetree.org/schemas/arm/qcom,coresight-dummy.yaml# > >> +$schema: http://devicetree.org/meta-schemas/core.yaml# > >> + > >> +title: QCOM Coresight Dummy component > >> + > >> +description: | > >> + The Coresight Dummy component is for the specific devices that HLOS don't have > >> + permission to access or configure. Such as Coresight sink EUD, some TPDMs etc. > >> + So there need driver to register dummy devices as Coresight devices. Provide > >> + Coresight API for dummy device operations, such as enabling and disabling > >> + dummy devices. Build the Coresight path for dummy sink or dummy source for > >> + debugging. > >> + > >> + The primary use case of the coresight dummy is to build path for dummy sink or > >> + dummy source. > >> + > >> +maintainers: > >> + - Mao Jinlong <quic_jinlmao@xxxxxxxxxxx> > >> + - Tao Zhang <quic_taozha@xxxxxxxxxxx> > >> + - Hao Zhang <quic_hazha@xxxxxxxxxxx> > >> + > >> +select: > >> + properties: > >> + compatible: > >> + contains: > >> + enum: > >> + - qcom,coresight-dummy Can we have coresight-dummy-source and coresight-dummy-sink? > >> + required: > >> + - compatible > > > > Why do you need the select? > > > This is a mistake, will remove it in the next version of patch. > >> + > >> +properties: > >> + $nodename: > >> + pattern: "^dummy_.*(sink|source)_[0-9]+.*$" > > > > We do not enforce node names in individual bindings. Why do you need it? > > Plus underscore is not even proper character... > > > I will remove this node. > > >> + compatible: > >> + items: > > > > Drop items. You have only one item, so no need for list. > > I will take your advice and update it in the next version of patch. > > >> + - const: qcom,coresight-dummy > >> + > >> + qcom,dummy-sink: > >> + type: boolean > >> + description: > >> + Indicates that the type of this coresight node is dummy sink. > > > > You just duplicated property name. Write something useful. > > > >> + > >> + qcom,dummy-source: > >> + type: boolean > >> + description: > >> + Indicates that the type of this coresight node is dummy source. > > > > You just duplicated property name. Write something useful. > > > These properties not required if the compatible name is more specific > Sure, I will add more details for it. > > >> + > >> + out-ports: > >> + description: | > > > > No need for | > > > >> + Output connections from the dummy source to Coresight Trace bus. > >> + $ref: /schemas/graph.yaml#/properties/ports > >> + > >> + properties: > >> + port: > >> + description: Output connection from the dummy source to Coresight > >> + Trace bus. > >> + $ref: /schemas/graph.yaml#/properties/port > >> + > >> + in-ports: > >> + description: | > > > > Ditto > > > I will remove it in the next version of patch. > > >> + Input connections from the CoreSight Trace bus to dummy sink. > >> + $ref: /schemas/graph.yaml#/properties/ports > >> + > >> + properties: > >> + port: > >> + description: Input connection from the Coresight Trace bus to > >> + dummy sink. > >> + $ref: /schemas/graph.yaml#/properties/port > >> + > >> +required: > >> + - compatible > >> + The binding should constrain out ports to dummy-source only, and in ports to dummy sink only. Regards Mike > >> +additionalProperties: false > >> + > >> +oneOf: > >> + - required: > >> + - qcom,dummy-sink > >> + - required: > >> + - qcom,dummy-source > >> + > >> +examples: > >> + # minimum dummy sink definition. dummy sink connect to coresight replicator. > >> + - | > >> + dummy_sink_1 { > > > > Node names should be generic, so "sink" > > https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation > > > >> + compatible = "qcom,coresight-dummy"; > >> + qcom,dummy-sink; > >> + > >> + in-ports { > >> + port { > >> + eud_in_replicator_swao: endpoint { > >> + remote-endpoint = > >> + <&replicator_swao_out_eud>; > > > > Why line break after =? > > > > >> + }; > >> + }; > >> + }; > >> + }; > >> + > >> + # minimum dummy source definition. dummy source connect to coresight funnel. > > > > If you use sentences, then start with capital letter. > > > > I will update it according to your advice in the next version of patch. > > >> + - | > >> + dummy_source_1 { > >> + compatible = "qcom,coresight-dummy"; > >> + qcom,dummy-source; > >> + > >> + out-ports { > >> + port { > >> + dummy_riscv_out_funnel_swao: endpoint { > >> + remote-endpoint = > >> + <&funnel_swao_in_dummy_riscv>; > > > > Why line break? > > I copy it from device tree and keep the original format, will correct > the format in the next version of patch. > > Thanks, > Hao > > >> + }; > >> + }; > >> + }; > >> + }; > >> + > >> +... > > > > Best regards, > > Krzysztof > > -- Mike Leach Principal Engineer, ARM Ltd. Manchester Design Centre. UK
