linux-kernel - Re: [PATCH] mmc: dt: Add property for broken hs200 quirk

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Message-ID: <CAPDyKFoGN49usQg5Ezv_AaWcKf3mRmZ=VJ8Rc4HDYh62ukiwXQ@mail.gmail.com>
Date:	Mon, 22 Dec 2014 11:04:42 +0100
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Bjorn Andersson <bjorn@...o.se>
Cc:	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	Anton Vorontsov <anton@...msg.org>,
	Chris Ball <chris@...ntf.net>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Grant Likely <grant.likely@...aro.org>,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:SECURE DIGITAL HO..." <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH] mmc: dt: Add property for broken hs200 quirk

On 19 December 2014 at 21:01, Bjorn Andersson <bjorn@...o.se> wrote:
> On Fri, Dec 19, 2014 at 3:38 AM, Ulf Hansson <ulf.hansson@...aro.org> wrote:
>> On 12 December 2014 at 20:28, Bjorn Andersson
>> <bjorn.andersson@...ymobile.com> wrote:
>>
>> Some more explanation to why this needed would be good.
>>
>
> Because (according to the git log) some of the memories that we
> mounted in Xperia Z1 does not support HS200 even though they advertise
> they are.

I see. How about using an mmc card quirk instead of a DT binding then?

Kind regards
Uffe

>
> I thought we needed for the device I'm testing with, but a couple of
> regulator_set_optimum_mode() solved that - so I have to provide a
> patch for that as well...
>
>>> Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
>>> ---
>>>  Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++
>>
>> This file lists the generic mmc DT bindings, but you want to add a
>> specific binding for sdhci?
>>
>
> Looking in sdhci_get_of_property() it's a mash of device specific
> properties, sdhci specific properties documented in mmc.txt and
> generic sdhci properties documented in device specific bindings.
>
> Would you like me to move it to a generic sdhci.txt binding and update
> the individual sdhci-* to reference that instead of mmc.txt? Or should
> I just add the property in the device specific bindings? Or maybe we
> could keep it as a optional property in mmc.txt?
>
> Regards,
> Bjorn
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