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Date:   Sat, 19 Dec 2020 17:26:01 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     DENG Qingfang <dqfext@...il.com>
Cc:     netdev@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Greg Ungerer <gerg@...nel.org>,
        Rene van Dorst <opensource@...rst.com>,
        John Crispin <john@...ozen.org>
Subject: Re: [RFC PATCH net-next] net: dsa: mt7530: rename MT7621 compatible

> --- a/drivers/net/dsa/mt7530.c
> +++ b/drivers/net/dsa/mt7530.c
> @@ -2688,7 +2688,7 @@ static const struct mt753x_info mt753x_table[] = {
>  };
>  
>  static const struct of_device_id mt7530_of_match[] = {
> -	{ .compatible = "mediatek,mt7621", .data = &mt753x_table[ID_MT7621], },
> +	{ .compatible = "mediatek,mt7621-gsw", .data = &mt753x_table[ID_MT7621], },
>  	{ .compatible = "mediatek,mt7530", .data = &mt753x_table[ID_MT7530], },
>  	{ .compatible = "mediatek,mt7531", .data = &mt753x_table[ID_MT7531], },
>  	{ /* sentinel */ },

This will break backwards compatibility with existing DT blobs. You
need to keep the old "mediatek,mt7621", but please add a comment that
it is deprecated.

   Andrew

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