linux-kernel - Re: [PATCH v5 04/15] dt-bindings: spi: dw: Add AMD Pensando Elba SoC SPI Controller bindings

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Date:   Mon, 20 Jun 2022 21:46:25 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Serge Semin <fancer.lancer@...il.com>,
        Brad Larson <brad@...sando.io>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org, adrian.hunter@...el.com,
        alcooperx@...il.com, andy.shevchenko@...il.com, arnd@...db.de,
        blarson@....com, brijeshkumar.singh@....com,
        catalin.marinas@....com, gsomlo@...il.com, gerg@...ux-m68k.org,
        krzysztof.kozlowski+dt@...aro.org, lee.jones@...aro.org,
        broonie@...nel.org, yamada.masahiro@...ionext.com,
        p.zabel@...gutronix.de, piotrs@...ence.com, p.yadav@...com,
        rdunlap@...radead.org, robh+dt@...nel.org, samuel@...lland.org,
        suravee.suthikulpanit@....com, thomas.lendacky@....com,
        ulf.hansson@...aro.org, will@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v5 04/15] dt-bindings: spi: dw: Add AMD Pensando Elba SoC
 SPI Controller bindings

On 20/06/2022 21:30, Serge Semin wrote:
> On Mon, Jun 13, 2022 at 12:56:47PM -0700, Brad Larson wrote:
>> From: Brad Larson <blarson@....com>
>>
>> The AMD Pensando Elba SoC has integrated the DW APB SPI Controller
>>
>> Signed-off-by: Brad Larson <blarson@....com>
>> ---
>>  Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
>> index e25d44c218f2..2a55b947cffc 100644
>> --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
>> +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
>> @@ -73,6 +73,8 @@ properties:
>>                - renesas,r9a06g032-spi # RZ/N1D
>>                - renesas,r9a06g033-spi # RZ/N1S
>>            - const: renesas,rzn1-spi   # RZ/N1
> 
>> +      - description: AMD Pensando Elba SoC SPI Controller
>> +        const: amd,pensando-elba-spi
> 
> Not enough. The driver requires to have a phandle reference to the
> Pensando System Controller. So the property like
> "amd,pensando-elba-syscon" is also needed to be added to the DT schema
> otherwise should the dt-schema tool correctly handle the
> "unevaluatedProperties: false" setting (Rob says it isn't fully
> supported at the moment), the dtbs_check procedure will fail on your
> dts evaluation.

The property was here before, now removed, so I assume it was also
removed from the driver and DTS. Isn't that the case?

Otherwise this is incomplete binding...

Best regards,
Krzysztof