linux-kernel - Re: [PATCH v4 1/3] dt-bindings: interconnect: Add rpmh virt devices

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Message-ID: <b7cc4f5d-c1d6-919c-9604-7855ea802d17@linaro.org>
Date:   Tue, 22 Nov 2022 08:50:39 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Melody Olvera <quic_molvera@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Odelu Kukatla <quic_okukatla@...cinc.com>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/3] dt-bindings: interconnect: Add rpmh virt devices

On 21/11/2022 18:39, Melody Olvera wrote:
> 
> 
> On 11/20/2022 5:13 AM, Krzysztof Kozlowski wrote:
>> On 18/11/2022 19:22, Melody Olvera wrote:
>>> Add documentation for virtual rpmh devices. These interconnects
>>> are not controlled by the application processor and thus
>>> require separate bindings. Also, move compatibles for sm8450 to
>>> this document and add them for QDU1000/QRU1000 platforms.
>>>
>>> Signed-off-by: Melody Olvera <quic_molvera@...cinc.com>
>>> ---
>>>  .../bindings/interconnect/qcom,rpmh-virt.yaml | 55 +++++++++++++++++++
>>>  .../bindings/interconnect/qcom,rpmh.yaml      |  2 -
>>>  2 files changed, 55 insertions(+), 2 deletions(-)
>>>  create mode 100644 Documentation/devicetree/bindings/interconnect/qcom,rpmh-virt.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/interconnect/qcom,rpmh-virt.yaml b/Documentation/devicetree/bindings/interconnect/qcom,rpmh-virt.yaml
>>> new file mode 100644
>>> index 000000000000..5cbaa51df863
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/interconnect/qcom,rpmh-virt.yaml
>>> @@ -0,0 +1,55 @@
>>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/interconnect/qcom,rpmh-virt.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Qualcomm RPMh Virtual Network-On-Chip Interconnect
>>> +
>>> +maintainers:
>>> +  - Georgi Djakov <georgi.djakov@...aro.org>
>>> +  - Odelu Kukatla <quic_okukatla@...cinc.com>
>>> +
>>> +description: |
>>> +   RPMh interconnect providers support system bandwidth requirements through
>>> +   RPMh hardware accelerators known as Bus Clock Manager (BCM). The provider is
>>> +   able to communicate with the BCM through the Resource State Coordinator (RSC)
>>> +   associated with each execution environment. Provider nodes must point to at
>>> +   least one RPMh device child node pertaining to their RSC and each provider
>>> +   can map to multiple RPMh resources. Virtual interconnect providers are not
>>> +   controlled by AP and do not support QoS; they should not have associated
>>> +   register regions.
>>> +
>>> +allOf:
>>> +  - $ref: qcom,rpmh-common.yaml#
>>> +
>>> +properties:
>>> +  compatible:
>>> +    enum:
>>> +      - qcom,qdu1000-clk-virt
>>> +      - qcom,qdu1000-mc-virt
>>> +      - qcom,sm8450-clk-virt
>>> +      - qcom,sm8450-mc-virt
>> You should also move qcom,sdx65-mc-virt, qcom,sc8280xp-mc-virt,
>> qcom,sc8280xp-clk-virt and more.
> 
> Ok. I wasn't sure since some of these entries don't seem to conform to
> these bindings, even though it seems they should.

I have impression that devices I listed conform to these bindings, this
is why I listed them. But if you are sure that they do not, then they
should not be moved.

Best regards,
Krzysztof