linux-kernel - Re: [PATCHv1 2/5] dt-bindings: ata: ahci: add RK3588 AHCI controller

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Date:   Fri, 14 Apr 2023 10:51:34 +0900
From:   Damien Le Moal <dlemoal@...nel.org>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Serge Semin <fancer.lancer@...il.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: [PATCHv1 2/5] dt-bindings: ata: ahci: add RK3588 AHCI controller

On 4/14/23 03:23, Sebastian Reichel wrote:
> Just like RK3568, the RK3588 has a DWC based AHCI controller.
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> ---
> FWIW IDK what exactly the ASIC clock is. The TRM does not provide any
> details unfortunately. It is required for functional SATA, though.
> ---
>  .../devicetree/bindings/ata/snps,dwc-ahci-common.yaml       | 6 ++++--
>  Documentation/devicetree/bindings/ata/snps,dwc-ahci.yaml    | 6 ++++--
>  2 files changed, 8 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..0df8f49431eb 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: 5
>  
>    clock-names:
>      minItems: 1
> -    maxItems: 4
> +    maxItems: 5
>      items:
>        oneOf:
>          - description: Application APB/AHB/AXI BIU clock
> @@ -50,6 +50,8 @@ properties:
>            const: rxoob
>          - description: SATA Ports reference clock
>            const: ref
> +        - description: Rockchip ASIC clock

Shouldn't this mention that this clock is for the 3588 only ? Or is it also
necessary for the 3568 ? That is not super clear.

> +          const: asic
>  
>    resets:
>      description:
> 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
>            - const: snps,dwc-ahci
>  
>  patternProperties: