linux-kernel - Re: [PATCH v2 2/6] dt-bindings: ata: ahci: add RK3588 AHCI controller

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Message-ID: <20230604185847.r23v53eetd53okyg@mobilestation>
Date:   Sun, 4 Jun 2023 21:58:47 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>
Cc:     Heiko Stuebner <heiko@...ech.de>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        linux-ide@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH v2 2/6] dt-bindings: ata: ahci: add RK3588 AHCI controller

On Mon, May 22, 2023 at 07:34:19PM +0200, Sebastian Reichel wrote:
> Just like RK3568, the RK3588 has a DWC based AHCI controller.
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> ---
>  .../devicetree/bindings/ata/snps,dwc-ahci-common.yaml     | 8 ++++++--
>  Documentation/devicetree/bindings/ata/snps,dwc-ahci.yaml  | 6 ++++--
>  2 files changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/ata/snps,dwc-ahci-common.yaml b/Documentation/devicetree/bindings/ata/snps,dwc-ahci-common.yaml
> index c1457910520b..34c5bf65b02d 100644

> --- a/Documentation/devicetree/bindings/ata/snps,dwc-ahci-common.yaml
> +++ b/Documentation/devicetree/bindings/ata/snps,dwc-ahci-common.yaml
> @@ -31,11 +31,11 @@ properties:
>        PM-alive clock, RxOOB detection clock, embedded PHYs reference (Rx/Tx)
>        clock, etc.
>      minItems: 1
> -    maxItems: 4
> +    maxItems: 6
>  
>    clock-names:
>      minItems: 1
> -    maxItems: 4
> +    maxItems: 6
>      items:
>        oneOf:
>          - description: Application APB/AHB/AXI BIU clock
> @@ -48,6 +48,10 @@ properties:
>            const: pmalive
>          - description: RxOOB detection clock
>            const: rxoob
> +        - description: PHY Transmit Clock
> +          const: asic
> +        - description: PHY Receive Clock
> +          const: rbc
>          - description: SATA Ports reference clock
>            const: ref

This part looks good but as I mentioned in my comment to the previous
patchset revision these are generic clocks. Extending the common
schema could be done in a framework of a preparation patch with
the justification described in my comment back then.

>  
> diff --git a/Documentation/devicetree/bindings/ata/snps,dwc-ahci.yaml b/Documentation/devicetree/bindings/ata/snps,dwc-ahci.yaml
> index 5afa4b57ce20..c6a0d6c8b62c 100644
> --- a/Documentation/devicetree/bindings/ata/snps,dwc-ahci.yaml
> +++ b/Documentation/devicetree/bindings/ata/snps,dwc-ahci.yaml
> @@ -23,9 +23,11 @@ properties:
>          const: snps,dwc-ahci
>        - description: SPEAr1340 AHCI SATA device
>          const: snps,spear-ahci

> -      - description: Rockhip RK3568 AHCI controller
> +      - description: Rockhip AHCI controller
>          items:
> -          - const: rockchip,rk3568-dwc-ahci
> +          - enum:
> +              - rockchip,rk3568-dwc-ahci
> +              - rockchip,rk3588-dwc-ahci

Regarding this part. I would suggest to just create a separate
DT-schema instead of extending the generic one. See my comment to the
next patch in the series and my suggestion posted in a comment to
the previous patchset revision.

-Serge(y)

>            - const: snps,dwc-ahci
>  
>  patternProperties:
> -- 
> 2.39.2
>