linux-kernel - Re: [RFC PATCH v3 2/3] dt-bindings: nand: meson: make ECC properties dependent

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Date:   Fri, 14 Jul 2023 09:55:53 -0600
From:   Rob Herring <robh@...nel.org>
To:     Arseniy Krasnov <AVKrasnov@...rdevices.ru>
Cc:     Liang Yang <liang.yang@...ogic.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        oxffffaa@...il.com, kernel@...rdevices.ru,
        linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v3 2/3] dt-bindings: nand: meson: make ECC properties
 dependent

On Tue, Jul 11, 2023 at 03:21:28PM +0300, Arseniy Krasnov wrote:
> ECC properties 'nand-ecc-strength' and 'nand-ecc-step-size' depends on
> each other, so they must be both either set or not set. 

Is that true for all drivers or just meson?

> In first case
> ECC core will try to use these values if possible (by checking ECC caps
> provided by driver), in second case ECC core will select most optimal
> values for both properties.
> 
> Signed-off-by: Arseniy Krasnov <AVKrasnov@...rdevices.ru>
> ---
>  Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> index e81757c9e0ed..4f6e56542a7e 100644
> --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> @@ -58,6 +58,10 @@ patternProperties:
>              meson-gxl-nfc 8, 16, 24, 30, 40, 50, 60
>              meson-axg-nfc 8
>  
> +    dependencies:
> +      nand-ecc-strength: ['nand-ecc-step-size']
> +      nand-ecc-step-size: ['nand-ecc-strength']
> +
>  required:
>    - compatible
>    - reg
> -- 
> 2.35.0
>