linux-kernel - Re: [PATCH] dt-bindings: fpga: microchip,mpf-spi-fpga-mgr: use spi-peripheral-props.yaml

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Message-ID: <20220727184643.7bpsrxxrrpyqbwtx@x260>
Date:   Wed, 27 Jul 2022 21:46:43 +0300
From:   Ivan Bornyakov <i.bornyakov@...rotek.ru>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Conor Dooley <conor.dooley@...rochip.com>,
        Moritz Fischer <mdf@...nel.org>, Wu Hao <hao.wu@...el.com>,
        Xu Yilun <yilun.xu@...el.com>, Tom Rix <trix@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-fpga@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: fpga: microchip,mpf-spi-fpga-mgr: use
 spi-peripheral-props.yaml

On Wed, Jul 27, 2022 at 06:43:47PM +0200, Krzysztof Kozlowski wrote:
> Instead of listing directly properties typical for SPI peripherals,
> reference the spi-peripheral-props.yaml schema.  This allows using all
> properties typical for SPI-connected devices, even these which device
> bindings author did not tried yet.
> 
> Remove the spi-* properties which now come via spi-peripheral-props.yaml
> schema, except for the cases when device schema adds some constraints
> like maximum frequency.
> 
> While changing additionalProperties->unevaluatedProperties, put it in
> typical place, just before example DTS.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Technically, this depends on [1] merged to SPI tree, if we want to
> preserve existing behavior of not allowing SPI CPHA and CPOL in each of
> schemas in this patch.
> 
> If this patch comes independently via different tree, the SPI CPHA and
> CPOL will be allowed for brief period of time, before [1] is merged.
> This will not have negative impact, just DT schema checks will be
> loosened for that period.
> 
> [1] https://lore.kernel.org/all/20220722191539.90641-2-krzysztof.kozlowski@linaro.org/
> ---
>  .../bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml          | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml b/Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml
> index aee45cb15592..527532f039ce 100644
> --- a/Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml
> +++ b/Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml
> @@ -22,13 +22,14 @@ properties:
>      description: SPI chip select
>      maxItems: 1
>  
> -  spi-max-frequency: true
> -
>  required:
>    - compatible
>    - reg
>  
> -additionalProperties: false
> +allOf:
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +unevaluatedProperties: false
>  
>  examples:
>    - |
> -- 
> 2.34.1
> 

Acked-by: Ivan Bornyakov <i.bornyakov@...rotek.ru>