linux-kernel - Re: [PATCH 1/2] dt-bindings: ufs: mediatek,ufs: add compatible for MT8195 SoC

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Date:   Mon, 18 Apr 2022 13:49:25 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Fabien Parent <fparent@...libre.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Stanley Chu <stanley.chu@...iatek.com>
Cc:     linux-scsi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 1/2] dt-bindings: ufs: mediatek,ufs: add compatible for
 MT8195 SoC

On 15/04/2022 18:59, Fabien Parent wrote:
> Add bindings for the MT8195 UFS support.
> 
> The MT8195 SoC requires more clocks to be enabled compared to MT8183 and
> MT8192. Document the clocks required for MT8195.
> 
> Signed-off-by: Fabien Parent <fparent@...libre.com>
> ---
>  .../devicetree/bindings/ufs/mediatek,ufs.yaml | 27 ++++++++++++++-----
>  1 file changed, 21 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/ufs/mediatek,ufs.yaml b/Documentation/devicetree/bindings/ufs/mediatek,ufs.yaml
> index 32fd535a514a..5ed36e95e933 100644
> --- a/Documentation/devicetree/bindings/ufs/mediatek,ufs.yaml
> +++ b/Documentation/devicetree/bindings/ufs/mediatek,ufs.yaml
> @@ -14,16 +14,31 @@ allOf:
>  
>  properties:
>    compatible:
> -    enum:
> -      - mediatek,mt8183-ufshci
> -      - mediatek,mt8192-ufshci
> +    oneOf:
> +      - enum:
> +          - mediatek,mt8183-ufshci
> +          - mediatek,mt8192-ufshci
> +      - items:
> +          - const: mediatek,mt8195-ufshci
> +          - const: mediatek,mt8183-ufshci

Are you sure that these devices are compatible? Amount of clock
differences suggests that not (or original bindings were not complete).

>  
>    clocks:
> -    maxItems: 1
> +    minItems: 1
> +    maxItems: 8
>  
>    clock-names:
> -    items:
> -      - const: ufs
> +    oneOf:
> +      - items:
> +          - const: ufs
> +      - items:
> +          - const: ufs
> +          - const: ufs_aes
> +          - const: ufs_tick
> +          - const: unipro_sysclk
> +          - const: unipro_tick
> +          - const: unipro_mp_bclk
> +          - const: ufs_tx_symbol
> +          - const: ufs_mem_sub

Add allOf:if:then: which specifies these clocks per different compatible.

Best regards,
Krzysztof