From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gregory CLEMENT <gregory.clement@free-electrons.com>
Subject: Re: [PATCH v5 05/12] dt: bindings: Add bindings for Marvell Xenon SD
 Host Controller
Date: Fri, 27 Jan 2017 18:25:56 +0100
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 (Ulf Hansson's message of "Fri, 27 Jan 2017 16:36:36 +0100")
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To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Jimmy Xu <zmxu@marvell.com>, Andrew Lunn <andrew@lunn.ch>, "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>, Mike Turquette <mturquette@baylibre.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Nadav Haklai <nadavh@marvell.com>, Ziji Hu <huziji@marvell.com>, Victor Gu <xigu@marvell.com>, Doug Jones <dougj@marvell.com>, linux-clk <linux-clk@vger.kernel.org>, Jisheng Zhang <jszhang@marvell.com>, Yehuda Yitschak <yehuday@marvell.com>, Ma rcin Wojtas <mw@semihalf.com>, Kostya Porotchkin <kostap@marvell.com>, Hanna Hawa <hannah@marvell.com>, Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, Jason Cooper <jason@lakedaemon.net>, Rob Herring <robh+dt@kernel.org>, Ryan Gao <ygao@marvell.com>, "Wei(SOCP) Liu" <liuw@marvell.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@li>
List-Id: linux-mmc@vger.kernel.org

Hi Ulf,
 
 On ven., janv. 27 2017, Ulf Hansson <ulf.hansson@linaro.org> wrote:

>>
>> But I am curious to know why do you think we could use it without any
>> need. Are you aware of some abuse of this property?
>
> Yes.
>

Actually I was hopping that you point some examples :)

But as you point mmc-ddr-3_3v I found my answers here:
http://www.spinics.net/lists/linux-mmc/msg38602.html

>>
>>>
>>> Perhaps you can elaborate exactly why it makes sense for your case. Or
>>> perhaps we already discussed this, in either case, please re-fresh my
>>> mind.
>>
>> For instance we need it now on the 7040DB board which does not have the
>> 1.8V signal voltage available.
>
> It it's better to describe what the controller/board support, instead
> of what it doesn't.
>
> I think you should be able to use other existing mmc DT bindings
> (perhaps also you need the brand new "mmc-ddr-3_3v"), instead of the
> "no-1-8-v".

OK I will try with this one. And if it works, I wonder if it worth
mentioning it as it is also part of the mmc binding.

Gregory

>
> Kind regards
> Uffe

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com