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

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Message-ID: <840a9364-352d-b79b-6e7a-c54912e2297a@sberdevices.ru>
Date:   Fri, 14 Jul 2023 22:22:53 +0300
From:   Arseniy Krasnov <avkrasnov@...rdevices.ru>
To:     Rob Herring <robh@...nel.org>
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 14.07.2023 18:55, Rob Herring wrote:
> 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?

As Miquel Raynal suggested, this will be implemented only for Meson driver at this moment.
Here is link with reply:
https://lore.kernel.org/linux-mtd/20230705065434.297040-1-AVKrasnov@sberdevices.ru/T/#m88705a0039fb30c18a9bb2b03a1add5f7e212a3b

Thanks, Arseniy

> 
>> 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
>>