linux-kernel - Re: [PATCH 2/3] dt-bindings: ufs: qcom: document SC7180 UFS

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Message-ID: <20240328035909.GB3212@thinkpad>
Date: Thu, 28 Mar 2024 09:29:09 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Avri Altman <avri.altman@....com>,
	Bart Van Assche <bvanassche@....org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Andy Gross <agross@...nel.org>,
	linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] dt-bindings: ufs: qcom: document SC7180 UFS

On Tue, Mar 26, 2024 at 06:46:31PM +0100, Krzysztof Kozlowski wrote:
> Document already upstreamed and used Qualcomm SC7180 UFS host controller
> to fix dtbs_check warnings like:
> 
>   sc7180-idp.dtb: ufshc@...4000: compatible:0: 'qcom,sc7180-ufshc' is not one of ...
>   sc7180-idp.dtb: ufshc@...4000: clocks: [[39, 99], [39, 7], [39, 98], [39, 107], [36, 0], [39, 106], [39, 105]] is too short
>   sc7180-idp.dtb: ufshc@...4000: clock-names: ['core_clk', 'bus_aggr_clk', 'iface_clk', 'core_clk_unipro', ...] is too short
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
>  .../devicetree/bindings/ufs/qcom,ufs.yaml     | 34 ++++++++++++++++---
>  1 file changed, 30 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
> index 1ab3d16917ac..7e6d442545ad 100644
> --- a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
> +++ b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
> @@ -27,6 +27,7 @@ properties:
>            - qcom,msm8996-ufshc
>            - qcom,msm8998-ufshc
>            - qcom,sa8775p-ufshc
> +          - qcom,sc7180-ufshc
>            - qcom,sc7280-ufshc
>            - qcom,sc8180x-ufshc
>            - qcom,sc8280xp-ufshc
> @@ -43,11 +44,11 @@ properties:
>        - const: jedec,ufs-2.0
>  
>    clocks:
> -    minItems: 8
> +    minItems: 7
>      maxItems: 11
>  
>    clock-names:
> -    minItems: 8
> +    minItems: 7
>      maxItems: 11
>  
>    dma-coherent: true
> @@ -113,6 +114,31 @@ required:
>  allOf:
>    - $ref: ufs-common.yaml
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - qcom,sc7180-ufshc
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 7
> +          maxItems: 7
> +        clock-names:
> +          items:
> +            - const: core_clk
> +            - const: bus_aggr_clk
> +            - const: iface_clk
> +            - const: core_clk_unipro
> +            - const: ref_clk
> +            - const: tx_lane0_sync_clk
> +            - const: rx_lane0_sync_clk
> +        reg:
> +          maxItems: 1
> +        reg-names:
> +          maxItems: 1
> +
>    - if:
>        properties:
>          compatible:
> @@ -250,7 +276,7 @@ allOf:
>          reg:
>            maxItems: 1
>          clocks:
> -          minItems: 8
> +          minItems: 7
>            maxItems: 8
>      else:
>        properties:
> @@ -258,7 +284,7 @@ allOf:
>            minItems: 1
>            maxItems: 2
>          clocks:
> -          minItems: 8
> +          minItems: 7

I'm getting confused by the clock requirements for qcom,ice. Why does specifying
the qcom,ice phandle require these clocks? These are the UFSHC clocks and
already defined above.

- Mani

>            maxItems: 11
>  
>  unevaluatedProperties: false
> -- 
> 2.34.1
> 

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