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From: guochun.mao@mediatek.com (Guochun Mao)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v1 2/2] arm: dts: mt2701: add nor flash node
Date: Sun, 22 Jan 2017 10:36:40 +0800	[thread overview]
Message-ID: <1485052600.19995.10.camel@mhfsdcap03> (raw)
In-Reply-To: <CAL_Jsq+S-FYy4SmjJ3fWzBugw2zCj5TQkkfUA8QVL7SLJW3E1g@mail.gmail.com>

Hi,
On Thu, 2017-01-19 at 08:18 -0600, Rob Herring wrote:
> On Thu, Jan 19, 2017 at 2:14 AM, Boris Brezillon
> > One last question and I'm done: is something like that acceptable?
> >
> >         compatible = "<vendor>,<old-soc>","<vendor>,<new-soc>";
> >
> > This can happen when someone adds support for an unsupported feature
> > on a brand new SoC, and then someone else use the same driver for an
> > older SoC embedding the same IP but still wants to add a new compatible
> > just in case these 2 IPs appear to be slightly different.
> 
> Yes, it's old and new compatible strings in this case and it's newest
> compatible string first.
> 
> > Here the order of compat strings is no longer following a clear rule
> > like 'most-specific compatible first' or 'newest IP/SoC version first',
> > it's completely dependent on the order these IPs were supported in the
> > OS (Linux). I'm perfectly fine with that BTW, just want to make sure
> > this is authorized.
> 
> I guess we should say "newest compatible for IP first" instead. There
> are some exceptions where we add fallbacks later on, but that falls
> under the most-specific part.
> 
> It's order that the bindings are defined, not Linux support really,
> but in practice those are the same.
> 
> Rob

Thanks for all your effort for code reviewing.
Our mt2701-nor's hardware is designed base on mt8713-nor,
even so, there would be some slight difference.
If I don't misunderstand your viewpoint in this discussion,
there's no need to drop mt2701-nor compatible.
And if not, is there any other suggestion?

Thanks.

  reply	other threads:[~2017-01-22  2:36 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-13  7:13 [PATCH v1 0/2] add nor flash node for mt2701 Guochun Mao
2017-01-13  7:13 ` [PATCH v1 1/2] Documentation: mtk-quadspi: update DT bindings Guochun Mao
2017-01-13 14:13   ` Boris Brezillon
2017-01-18 22:08     ` Rob Herring
2017-01-13  7:13 ` [PATCH v1 2/2] arm: dts: mt2701: add nor flash node Guochun Mao
2017-01-13 12:49   ` Marek Vasut
2017-01-13 14:17   ` Boris Brezillon
2017-01-13 15:12     ` Matthias Brugger
2017-01-13 15:21       ` Boris Brezillon
2017-01-13 16:13       ` Marek Vasut
2017-01-13 16:28         ` Boris Brezillon
2017-01-13 16:44           ` Marek Vasut
2017-01-13 16:56             ` Boris Brezillon
2017-01-13 17:33               ` Marek Vasut
2017-01-14  8:29                 ` Boris Brezillon
2017-01-15  0:23                   ` Marek Vasut
2017-01-16  8:40                     ` Boris Brezillon
2017-01-16 16:09                       ` Marek Vasut
2017-01-17  3:36                       ` Thomas Petazzoni
2017-01-18 22:20                         ` Rob Herring
2017-01-18 23:38                           ` Thomas Petazzoni
2017-01-19  2:51                             ` Rob Herring
2017-01-19  8:14                               ` Boris Brezillon
2017-01-19 14:18                                 ` Rob Herring
2017-01-22  2:36                                   ` Guochun Mao [this message]
2017-01-24 10:31                                     ` Boris Brezillon
2017-01-24 10:38                                       ` John Crispin
2017-01-19  7:53                           ` Boris Brezillon
2017-01-17  3:32               ` Thomas Petazzoni

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