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Date:	Sat, 02 Aug 2014 09:49:53 +0200
From:	Andreas Färber <afaerber@...e.de>
To:	Doug Anderson <dianders@...omium.org>,
	Tomasz Figa <tomasz.figa@...il.com>
CC:	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Stephan van Schaik <stephan@...khronix.com>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 4/4] ARM: dts: Add exynos5250-spring device tree

Am 02.08.2014 07:15, schrieb Doug Anderson:
> On Thu, Jul 31, 2014 at 12:40 PM, Tomasz Figa <tomasz.figa@...il.com> wrote:
>> On 31.07.2014 21:20, Andreas Färber wrote:
>>> Am 31.07.2014 21:05, schrieb Tomasz Figa:
>>>> On 31.07.2014 18:08, Andreas Färber wrote:
>>>>> +&sd1_clk {
>>>>> +   samsung,pin-drv = <0>;
>>>>> +};
>>>>> +
>>>>> +&sd1_cmd {
>>>>> +   samsung,pin-pud = <3>;
>>>>> +   samsung,pin-drv = <0>;
>>>>> +};
>>>>> +
>>>>> +&sd1_cd {
>>>>> +   samsung,pin-drv = <0>;
>>>>> +};
>>>>> +
>>>>> +&sd1_bus4 {
>>>>> +   samsung,pin-drv = <0>;
>>>>> +};
>>>>
>>>> Here generic settings are being overridden, so it might be a good idea
>>>> to explain why, like with i2c pull-up above.
>>>
>>> Snow does not have an explanation either, so please suggest what comment
>>> you'd like to see. Consider me just a user with no specs. :)
>>
>> Doug, Vincent, someone else?
> 
> The comment is just in a different place--it's in the dw_mmc node.
> Probably belongs here, though:
> 
>                 /*
>                  * Wifi is a SiP, so can keep drive strengths low
>                  * to reduce EMI.
>                  */
> 

I did copy such a comment for the MMC node in v5, still present in v6.

Andreas

> I guess the cmd line isn't documented.  There is no external pull on
> the command line and on most boards there is one.  Our hardware guys
> thought we didn't need it and apparently we don't...

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