linux-kernel - Re: [PATCH 1/2] stmmac: dwmac-mediatek: add support for mt8188

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Message-ID: <b343e4c7-a247-28b8-3d16-cb7cea7ba36b@linaro.org>
Date:   Mon, 19 Sep 2022 12:06:04 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jianguo Zhang <jianguo.zhang@...iatek.com>,
        "David S . Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Biao Huang <biao.huang@...iatek.com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 1/2] stmmac: dwmac-mediatek: add support for mt8188

On 19/09/2022 11:56, Jianguo Zhang wrote:
>> No, this does not justify new entry. You need specific compatible,
>> but
>> not new entry.
>>
>>> On the other hand, mt8188 and mt8195 have same ethernet design, so
>>> the
>>> private data "mt8195_gmac_variant" can be resued to reduce
>>> redundant
>>> info in driver.
>>
>> And you do not need new entry in the driver.
> Do you mean that I can use "mediatek,mt8195-gmac" as compatible for
> ethernet in mt8188 DTS file?

Yes, as a fallback. Example schema describes such case.

Best regards,
Krzysztof