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Message-ID: <20220517185841.GA1388602-robh@kernel.org>
Date:   Tue, 17 May 2022 13:58:41 -0500
From:   Rob Herring <robh@...nel.org>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Jens Axboe <axboe@...nel.dk>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 01/23] dt-bindings: ata: ahci-platform: Drop
 dma-coherent property declaration

On Thu, May 12, 2022 at 02:17:48AM +0300, Serge Semin wrote:
> It's redundant to have the 'dma-coherent' property explicitly specified in
> the DT schema because it's a generic property described in the core
> DT-schema by which the property is always evaluated.

It is not redundant.

The core schema defines the property (as a boolean), but this schema 
defines it being used in this binding. Otherwise, it won't be allowed.

Rob

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