linux-kernel - Re: [PATCH 1/2] dt-bindings: interconnect: Add Qualcomm SM6115 NoC

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Message-ID: <8366b046-068e-41df-9dd6-9aa4beefc6ca@linaro.org>
Date:   Mon, 27 Nov 2023 09:17:39 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        Konrad Dybcio <konradybcio@...nel.org>
Subject: Re: [PATCH 1/2] dt-bindings: interconnect: Add Qualcomm SM6115 NoC

On 25/11/2023 16:59, Konrad Dybcio wrote:
> Add bindings for Qualcomm SM6115 Network-On-Chip interconnect.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  .../bindings/interconnect/qcom,sm6115.yaml         | 128 +++++++++++++++++++++
>  include/dt-bindings/interconnect/qcom,sm6115.h     | 111 ++++++++++++++++++
>  2 files changed, 239 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/interconnect/qcom,sm6115.yaml b/Documentation/devicetree/bindings/interconnect/qcom,sm6115.yaml
> new file mode 100644
> index 000000000000..8908946eb391
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interconnect/qcom,sm6115.yaml
> @@ -0,0 +1,128 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/interconnect/qcom,sm6115.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm SM6115 Network-On-Chip interconnect
> +
> +maintainers:
> +  - Konrad Dybcio <konradybcio@...nel.org>
> +
> +description: |

Do not need '|' unless you need to preserve formatting.

> +  The Qualcomm SM6115 interconnect providers support adjusting the
> +  bandwidth requirements between the various NoC fabrics.
> +
> +properties:
> +  reg:
> +    maxItems: 1
> +
> +  compatible:

compatible is the first in properties (move it before reg).

> +    enum:
> +      - qcom,sm6115-bimc
> +      - qcom,sm6115-cnoc
> +      - qcom,sm6115-snoc
> +

Add clocks: with min/maxItems here. Same with clock-names.


> +# Child node's properties
> +patternProperties:
> +  '^interconnect-[a-z0-9]+$':
> +    type: object
> +    description:
> +      The interconnect providers do not have a separate QoS register space,
> +      but share parent's space.
> +
> +    allOf:

Drop allOf, just $ref.

> +      - $ref: qcom,rpm-common.yaml#
> +
> +    properties:
> +      compatible:
> +        enum:
> +          - qcom,sm6115-clk-virt
> +          - qcom,sm6115-mmrt-virt
> +          - qcom,sm6115-mmnrt-virt
> +
> +    required:
> +      - compatible
> +
> +    unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +
> +unevaluatedProperties: false

Put it after allOf: block.

> +
> +allOf:
> +  - $ref: qcom,rpm-common.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          const: qcom,sm6115-cnoc
> +
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: USB-NoC AXI clock
> +
> +        clock-names:
> +          items:
> +            - const: usb_axi
> +
> +  - if:
> +      properties:
> +        compatible:
> +          const: qcom,sm6115-snoc
> +
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: CPU-NoC AXI clock.
> +            - description: UFS-NoC AXI clock.
> +            - description: USB-NoC AXI clock.
> +            - description: IPA clock.
> +
> +        clock-names:
> +          items:
> +            - const: cpu_axi
> +            - const: ufs_axi
> +            - const: usb_axi
> +            - const: ipa

Add if: for remaining variant disallowing clocks and clock-names.
(clocks: false)

> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,rpmcc.h>

Is it used?

> +
> +    snoc: interconnect@...0000 {
> +        compatible = "qcom,sm6115-snoc";
> +        reg = <0x01880000 0x60200>;
> +        #interconnect-cells = <1>;

Missing clocks.

> +
> +        qup_virt: interconnect-qup {
> +            compatible = "qcom,sm6115-qup-virt";
> +            #interconnect-cells = <1>;
> +        };
> +
> +        mmnrt_virt: interconnect-mmnrt {
> +            compatible = "qcom,sm6115-mmnrt-virt";
> +            #interconnect-cells = <1>;
> +        };
> +
> +        mmrt_virt: interconnect-mmrt {
> +            compatible = "qcom,sm6115-mmrt-virt";
> +            #interconnect-cells = <1>;
> +        };
> +    };
> +
> +    cnoc: interconnect@...0000 {
> +        compatible = "qcom,sm6115-cnoc";
> +        reg = <0x01900000 0x8200>;
> +        #interconnect-cells = <1>;
> +    };
> +
> +    bimc: interconnect@...0000 {
> +        compatible = "qcom,sm6115-bimc";
> +        reg = <0x04480000 0x80000>;
> +        #interconnect-cells = <1>;
> +    };

Drop this node, duplicates cnoc.

> diff --git a/include/dt-bindings/interconnect/qcom,sm6115.h b/include/dt-bindings/interconnect/qcom,sm6115.h
> new file mode 100644
> index 000000000000..21090e585f05



Best regards,
Krzysztof