linux-kernel - Re: [PATCH v3 01/12] mmc: mediatek: add support of mt2701/mt2712

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Date:   Tue, 10 Oct 2017 10:09:49 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Chaotian Jing <chaotian.jing@...iatek.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        yong mao <yong.mao@...iatek.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Phong LE <ple@...libre.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-mediatek@...ts.infradead.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        srv_heupstream <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v3 01/12] mmc: mediatek: add support of mt2701/mt2712

On 10 October 2017 at 09:35, Chaotian Jing <chaotian.jing@...iatek.com> wrote:
> On Tue, 2017-10-10 at 09:26 +0200, Ulf Hansson wrote:
>> [...]
>>
>> > +
>> > +static const struct of_device_id msdc_of_ids[] = {
>> > +       { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
>> > +       { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
>> > +       { .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat},
>> > +       { .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat},
>> > +       {}
>> > +};
>> > +MODULE_DEVICE_TABLE(of, msdc_of_ids);
>>
>> As already stated in the other reply. These new compatible changes
>> needs to be discussed and acked before the driver starts using them.
>>
>> In other words, make patch3 to precede this one.
> but, then there will have a probe issue as mentioned in previous mail
> list. that's why I separate the binding file changes to 2 patches.

That sounds seriously wrong. Aren't the bindings backwards compatible?

Kind regards
Uffe