linux-kernel - Re: [PATCH V2 4/4] dt-bindings: lpspi: New property in document DT bindings for LPSPI

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Message-ID: <CAL_Jsq+M0bjH6KnrT4ob6YF7VZxUtgUeAJOE84Omp4PNH2hSZQ@mail.gmail.com>
Date:   Fri, 31 Jul 2020 11:38:25 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Clark Wang <xiaoning.wang@....com>
Cc:     Mark Brown <broonie@...nel.org>, Anson Huang <Anson.Huang@....com>,
        linux-spi <linux-spi@...r.kernel.org>,
        devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 4/4] dt-bindings: lpspi: New property in document DT
 bindings for LPSPI

On Sun, Jul 26, 2020 at 9:15 PM Clark Wang <xiaoning.wang@....com> wrote:
>
> Add "fsl,spi-only-use-cs1-sel" to fit i.MX8DXL-EVK.
> Spi common code does not support use of CS signals discontinuously.
> It only uses CS1 without using CS0. So, add this property to re-config
> chipselect value.
>
> Signed-off-by: Clark Wang <xiaoning.wang@....com>
> ---
> Changes:
> V2:
>  - New patch added in the v2 patchset.
> ---
>  Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
> index 143b94a1883a..22882e769e26 100644
> --- a/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
> +++ b/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml
> @@ -34,6 +34,12 @@ properties:
>        - const: per
>        - const: ipg
>
> +  fsl,spi-only-use-cs1-sel:
> +    description:
> +      spi common code does not support use of CS signals discontinuously.
> +      i.MX8DXL-EVK board only uses CS1 without using CS0. Therefore, add
> +      this property to re-config the chipselect value in the LPSPI driver.

This breaks linux-next and you didn't test with 'make dt_binding_check':

/builds/robherring/linux-dt-bindings/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml:
properties:fsl,spi-only-use-cs1-sel: {'description': 'spi common code
does not support use of CS signals discontinuously. i.MX8DXL-EVK board
only uses CS1 without using CS0. Therefore, add this property to
re-config the chipselect value in the LPSPI driver.'} is not valid
under any of the given schemas (Possible causes of the failure):
 /builds/robherring/linux-dt-bindings/Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml:
properties:fsl,spi-only-use-cs1-sel: 'not' is a required property

The problem is you need a type definition for a vendor specific
property. In this case 'type: boolean'.

Rob