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From:   Chuanhong Guo <gch981213@gmail.com>
Date:   Mon, 4 Apr 2022 00:01:32 +0800
Message-ID: <CAJsYDVK9UB=71Yj2t9Rc658W66Lf=uK6eLn5S+Y8Rj3skz4g+w@mail.gmail.com>
Subject: Re: [PATCH 3/4] dt-bindings: spi: add binding doc for spi-mtk-snfi
To:     Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc:     Miquel Raynal <miquel.raynal@bootlin.com>,
        Mark Brown <broonie@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzk+dt@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Richard Weinberger <richard@nod.at>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Roger Quadros <rogerq@kernel.org>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Cai Huoqing <cai.huoqing@linux.dev>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Colin Ian King <colin.king@intel.com>,
        Wolfram Sang <wsa+renesas@sang-engineering.com>,
        Paul Cercueil <paul@crapouillou.net>,
        Pratyush Yadav <p.yadav@ti.com>, Yu Kuai <yukuai3@huawei.com>,
        "open list:SPI SUBSYSTEM" <linux-spi@vger.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@lists.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@lists.infradead.org>,
        open list <linux-kernel@vger.kernel.org>,
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Hi!

On Sun, Apr 3, 2022 at 11:49 PM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
> [...]
> >>> +
> >>> +  ecc-engine:
> >>
> >> The nand-chip.yaml defines a nand-ecc-engine, so how about using that
> >> one? I know mtk-nand.txt uses ecc-engine, but for new schema better to
> >> use properties from existing YAML.
> >
> > The ecc-engine code is shared between mtk_nand.c and this driver, and
> > the property name is defined in the shared part. I left it as-is so that
> > existing dt for mtk_nand doesn't break.
>
> This can be easily fixed with:
>         np = of_parse_phandle(of_node, "nand-ecc-engine", 0);
>         if (!np) {
>                 /* Backwards compatible */
>                 np = of_parse_phandle(of_node, "ecc-engine", 0);
>         }
>
> I would like to avoid having one property in generic NAND schema and
> keep adding something slightly different everywhere else.

OK. I'll add a commit for this in the next version.

-- 
Regards,
Chuanhong Guo