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Message-ID: <7f525d11-c738-4f45-1821-d1c617cd6401@quicinc.com>
Date: Thu, 9 Jun 2022 09:12:47 +0800
From: Jinlong Mao <quic_jinlmao@...cinc.com>
To: Rob Herring <robh@...nel.org>
CC: 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>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
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 <bjorn.andersson@...aro.org>
Subject: Re: [PATCH v8 03/10] dt-bindings: arm: Adds CoreSight TPDM hardware
definitions
Thank you Rob for the review of the yaml changes.
I will check and address all you comments.
On 6/9/2022 6:01 AM, Rob Herring wrote:
> On Wed, Jun 08, 2022 at 11:46:58PM +0800, Mao Jinlong wrote:
>> Adds new coresight-tpdm.yaml file describing the bindings required
>> to define tpdm in the device trees.
>>
>> Acked-by: Suzuki K Poulose <suzuki.poulose@....com>
>> 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-tpdm.yaml | 99 +++++++++++++++++++
> qcom,coresight-tpdm.yaml
>
>> .../devicetree/bindings/arm/coresight.txt | 7 ++
> This file is going away[1]. I'd just drop the changes to it.
>
>> MAINTAINERS | 1 +
>> 3 files changed, 107 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/arm/coresight-tpdm.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/arm/coresight-tpdm.yaml b/Documentation/devicetree/bindings/arm/coresight-tpdm.yaml
>> new file mode 100644
>> index 000000000000..14bef4ce4274
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/arm/coresight-tpdm.yaml
>> @@ -0,0 +1,99 @@
>> +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
>> +# Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/arm/coresight-tpdm.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Trace, Profiling and Diagnostics Monitor - TPDM
>> +
>> +description: |
>> + The TPDM or Monitor serves as data collection component for various dataset
>> + types specified in the QPMDA spec. It covers Implementation defined ((ImplDef),
>> + Basic Counts (BC), Tenure Counts (TC), Continuous Multi-Bit (CMB), and Discrete
>> + Single Bit (DSB). It performs data collection in the data producing clock
>> + domain and transfers it to the data collection time domain, generally ATB
>> + clock domain.
>> +
>> + The primary use case of the TPDM is to collect data from different data
>> + sources and send it to a TPDA for packetization, timestamping, and funneling.
>> +
>> +maintainers:
>> + - Mao Jinlong <quic_jinlmao@...cinc.com>
>> + - Tao Zhang <quic_taozha@...cinc.com>
>> +
>> +properties:
>> + $nodename:
>> + pattern: "^tpdm(@[0-9a-f]+)$"
> blank line
>
>> + compatible:
>> + items:
>> + - const: qcom,coresight-tpdm
>> + - const: arm,primecell
> You need a 'select' to fix the errors reported. See other primecell
> bindings.
>
>> +
>> + reg:
>> + maxItems: 1
>> +
>> + clocks:
>> + maxItems: 1
>> +
>> + clock-names:
>> + items:
>> + - const: apb_pclk
>> +
>> + out-ports:
>> + description: |
>> + Output connections from the TPDM to coresight funnle/tpda.
> typo
>
>> + $ref: /schemas/graph.yaml#/properties/ports
> blank line here.
>
>> + properties:
>> + port:
>> + description: Output connection from the TPDM to coresight
>> + funnel/tpda.
> s/tpda/TPDA/
>
>> + $ref: /schemas/graph.yaml#/properties/port
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - clocks
>> + - clock-names
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + # minimum TPDM definition. TPDM connect to coresight funnel.
>> + - |
>> + tpdm@...0000 {
>> + compatible = "qcom,coresight-tpdm", "arm,primecell";
>> + reg = <0x6980000 0x1000>;
>> +
>> + clocks = <&aoss_qmp>;
>> + clock-names = "apb_pclk";
>> +
>> + out-ports {
>> + port {
>> + tpdm_turing_out_funnel_turing: endpoint {
>> + remote-endpoint =
>> + <&funnel_turing_in_tpdm_turing>;
>> + };
>> + };
>> + };
>> + };
>> + # minimum TPDM definition. TPDM connect to coresight TPDA.
>> + - |
> The only difference in the 2 examples is some external phandle. 1
> example is sufficient.
>
>> + tpdm@...c000 {
>> + compatible = "qcom,coresight-tpdm", "arm,primecell";
>> + reg = <0x684c000 0x1000>;
>> +
>> + clocks = <&aoss_qmp>;
>> + clock-names = "apb_pclk";
>> +
>> + out-ports {
>> + port {
>> + tpdm_prng_out_tpda_qdss: endpoint {
>> + remote-endpoint =
>> + <&tpda_qdss_in_tpdm_prng>;
>> + };
>> + };
>> + };
>> + };
>> +
>> +...
> Rob
>
> [1] https://lore.kernel.org/all/20220603011933.3277315-1-robh@kernel.org/
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