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

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Message-ID: <536af0d9-aa00-ddf1-753d-670ec2adef91@linaro.org>
Date:   Sun, 20 Nov 2022 12:13:05 +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 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.

> +
> +  '#interconnect-cells': true
> +
> +required:
> +  - compatible
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +      #include <dt-bindings/interconnect/qcom,sm8450.h>
> +
> +      clk_virt: interconnect-0 {
> +             compatible = "qcom,sm8450-clk-virt";
> +             #interconnect-cells = <2>;
> +             qcom,bcm-voters = <&apps_bcm_voter>;
> +      };
> +
> +      mc_virt: interconnect-1 {
> +             compatible = "qcom,sm8450-mc-virt";
> +             #interconnect-cells = <2>;
> +             qcom,bcm-voters = <&apps_bcm_voter>;

These are exactly the same examples, so just keep one.

Best regards,
Krzysztof