linux-kernel - Re: [PATCH 05/11] dt-bindings: spi: dw: Add Pensando Elba SoC SPI Controller bindings

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Date:   Wed, 25 May 2022 17:27:32 -0700
From:   Brad Larson <brad@...sando.io>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Mark Brown <broonie@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Olof Johansson <olof@...om.net>,
        David Clear <dac2@...sando.io>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/11] dt-bindings: spi: dw: Add Pensando Elba SoC SPI
 Controller bindings

Hi Krzysztof,

On Thu, Apr 7, 2022 at 11:52 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 07/04/2022 01:36, Brad Larson wrote:
> > --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> > +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> > @@ -37,6 +37,21 @@ allOf:
> >      else:
> >        required:
> >          - interrupts
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            enum:
> > +              - pensando,elba-spi
> > +    then:
> > +      properties:
> > +        pensando,syscon-spics:
> > +          $ref: /schemas/types.yaml#/definitions/phandle
> > +          description:
> > +            Phandle to the system control device node which provides access to
> > +            the spics control register
>
> It looks you only need to poke one register from spics, so it could be
> something like:
>
>     items:
>       - items:
>           - description: Phandle to the system control device node
>           - description: spics control register offset

This looks better, I'll change to this approach for updated patchset.

Regards,
Brad