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Message-ID: <CAK7LNAQGGdcDq8Q=9LG2ev_O3eaH55Hq-Te5NZCTSuB-K+9dVw@mail.gmail.com>
Date:	Sat, 24 Oct 2015 12:24:07 +0900
From:	Masahiro Yamada <yamada.masahiro@...ionext.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	arm@...nel.org, Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH 2/4] ARM: dts: uniphier: delete i2c aliases

2015-10-24 5:16 GMT+09:00 Arnd Bergmann <arnd@...db.de>:
> On Wednesday 21 October 2015 20:36:28 Masahiro Yamada wrote:
>> The user space should not expect that a particular I2C channel is
>> always visible through the same character device.
>> No reason to fix the I2C indexes with aliases.
>>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
>>
>
> As I said in my reply to the earlier mail, I didn't really like the
> idea of having holes in the numbering for the i2c controllers, but
> this new approach also doesn't look ideal.
>
> We should have stable bus numbers on any given board, and the aliases
> work well for that. I just don't think the aliases need to be stable
> between different boards just because they are based on the same
> SoC.
>
> I'd suggest staying with the current slightly awkward approach though,
> to avoid regressions. Please send a follow-up patch to add the same
> aliases on the new boards and drop this patch, unless someone else
> can come up with a better idea.
>

OK, will do.


-- 
Best Regards
Masahiro Yamada
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