From: John Crispin <john@phrozen.org>
To: Guochun Mao <guochun.mao@mediatek.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Rob Herring <robh@kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Richard Weinberger <richard@nod.at>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Russell King <linux@armlinux.org.uk>,
Marek Vasut <marek.vasut@gmail.com>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
linux-mediatek@lists.infradead.org,
Mark Rutland <mark.rutland@arm.com>,
Brian Norris <computersforpeace@gmail.com>,
David Woodhouse <dwmw2@infradead.org>,
Cyrille Pitchen <cyrille.pitchen@atmel.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v1 2/2] arm: dts: mt2701: add nor flash node
Date: Tue, 24 Jan 2017 11:38:41 +0100 [thread overview]
Message-ID: <3b86fcfd-9f8a-b324-e164-20582a0b2e40@phrozen.org> (raw)
In-Reply-To: <20170124113118.304a860c@bbrezillon>
On 24/01/2017 11:31, Boris Brezillon wrote:
> On Sun, 22 Jan 2017 10:36:40 +0800
> Guochun Mao <guochun.mao@mediatek.com> wrote:
>
>> 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.
>
> No, just update the documentation as suggested by Rob.
>
>> And if not, is there any other suggestion?
>
> Nope, and my apologies for being so insistent on something I obviously
> misunderstood.
>
> Regards,
>
> Boris
Hi,
could you please add the mt7623 compat string to the documentation
aswell while at it ? mt7623/mt2701 are essentially the same and it'll
safe us time and effort and not cause merge order conflicts. otherwise i
would need to wait till the mt2701 patch is merged before i can send the
mt7623 one
Thanks !
John
next prev parent reply other threads:[~2017-01-24 10:39 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
2017-01-24 10:31 ` Boris Brezillon
2017-01-24 10:38 ` John Crispin [this message]
2017-01-19 7:53 ` Boris Brezillon
2017-01-17 3:32 ` Thomas Petazzoni
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3b86fcfd-9f8a-b324-e164-20582a0b2e40@phrozen.org \
--to=john@phrozen.org \
--cc=boris.brezillon@free-electrons.com \
--cc=computersforpeace@gmail.com \
--cc=cyrille.pitchen@atmel.com \
--cc=devicetree@vger.kernel.org \
--cc=dwmw2@infradead.org \
--cc=guochun.mao@mediatek.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux-mtd@lists.infradead.org \
--cc=linux@armlinux.org.uk \
--cc=marek.vasut@gmail.com \
--cc=mark.rutland@arm.com \
--cc=matthias.bgg@gmail.com \
--cc=richard@nod.at \
--cc=robh@kernel.org \
--cc=thomas.petazzoni@free-electrons.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).