linux-kernel - Re: [PATCH v3 2/5] dt-bindings: ata: dwc-ahci: add Rockchip RK3588

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Message-ID: <20230612085200.5okxcipiw5sofo62@mobilestation>
Date:   Mon, 12 Jun 2023 11:52:00 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Sebastian Reichel <sebastian.reichel@...labora.com>,
        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 v3 2/5] dt-bindings: ata: dwc-ahci: add Rockchip RK3588

On Mon, Jun 12, 2023 at 10:39:57AM +0200, Krzysztof Kozlowski wrote:
> On 12/06/2023 10:35, Serge Semin wrote:
> > On Mon, Jun 12, 2023 at 10:24:06AM +0200, Krzysztof Kozlowski wrote:
> >> On 08/06/2023 18:22, Sebastian Reichel wrote:
> >>> This adds Rockchip RK3588 AHCI binding. In order to narrow down the
> >>> allowed clocks without bloating the generic binding, the description
> >>> of Rockchip's AHCI controllers has been moved to its own file.
> >>>
> >>> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> >>> ---
> >>
> >> ...
> >>
> >>> +
> >>> +properties:
> >>> +  compatible:
> >>> +    items:
> >>> +      - enum:
> >>> +          - rockchip,rk3568-dwc-ahci
> >>> +          - rockchip,rk3588-dwc-ahci
> >>> +      - const: snps,dwc-ahci
> >>> +
> >>> +  ports-implemented:
> >>> +    const: 1
> >>> +
> >>> +patternProperties:
> >>> +  "^sata-port@[0-9a-e]$":
> >>> +    $ref: /schemas/ata/snps,dwc-ahci-common.yaml#/$defs/dwc-ahci-port
> >>> +
> >>> +    unevaluatedProperties: false
> >>
> > 
> >> You should be able to skip this patternProperties entirely, because it
> >> comes from dwc-ahci-common -> ahci-common schema. Did you try the patch
> >> without it?
> > 

> > Please see my message about this. The "sata-port@[0-9a-e]$" sub-node
> > bindings could be updated with the "reg" property constraint which,
> > based on the "ports-implemented" property value, most likely is
> > supposed to be always set to const: 1.
> 
> Then anyway the pattern is wrong as it should be @1 always.

* I miscalculated a bit, it should have been zero but in general
the pattern-property is indeed redundant.

As a conclusion the change should look like this:

+properties:
+  compatible:
+    items:
+      - enum:
+          - rockchip,rk3568-dwc-ahci
+          - rockchip,rk3588-dwc-ahci
+      - const: snps,dwc-ahci
+
+  ports-implemented:
+    const: 1
+
+  "sata-port@0":
+    $ref: /schemas/ata/snps,dwc-ahci-common.yaml#/$defs/dwc-ahci-port
+
+    properties:
+      reg:
+        const: 0
+
+    unevaluatedProperties: false
+
+ ...

Right?

-Serge(y)

> 
> Best regards,
> Krzysztof
>