From: Balaji T K <balajitk@ti.com>
To: Stefan Roese <stefan.roese@gmail.com>, Sebastian Reichel <sre@ring0.de>
Cc: Michael Trimarchi <michael@amarulasolutions.com>,
Linux OMAP Mailing List <linux-omap@vger.kernel.org>,
Linux MMC List <linux-mmc@vger.kernel.org>,
Tony Lindgren <tony@atomide.com>, 'Chris Ball' <chris@printf.net>
Subject: Re: SD card timeout problems on Nokia N900 (omap_hsmmc on OMAP3)
Date: Wed, 26 Feb 2014 14:14:46 +0530 [thread overview]
Message-ID: <530DA97E.7090406@ti.com> (raw)
In-Reply-To: <530D8FF2.3070100@gmail.com>
On Wednesday 26 February 2014 12:25 PM, Stefan Roese wrote:
> Hi Sebastian,
>
> On 26.02.2014 07:02, Michael Trimarchi wrote:
>> Hi Sebastian
>>
>> On Wed, Feb 26, 2014 at 12:47 AM, Sebastian Reichel <sre@ring0.de> wrote:
>>> Hi,
>>>
>>> I have problems with the SD-card initialization on my Nokia N900
>>> using a 3.14-rc1 based kernel in DT boot mode. The bug is can be
>>> circumvented by changing the kernel slightly (e.g. remove some DT
>>> nodes or mark them as disabled). So the SD card's timeout problems
>>> seem to derive from kernel timing problems. I'm pretty sure, that
>>> the problems are not originating from a broken SD card, since
Can you provide removed/Disabled dt nodes, it might give some clue ?
>>>
>>> 1. The SD card worked quite good before and still does depending
>>> on unrelated DTS changes (=> loading less drivers).
>>> 2. The SD card works flawlessly on my notebook using a USB adapter
>>> 3. Another SD card showed the same problem
>>>
>>> I tried to git bisect the problem, but I just get shown some
>>> unrelated driver additions.
>>>
>>> Anyways, this is the error I get during boot:
>>>
>>> [ 3.896820] mmc0: mmc_rescan_try_freq: trying to init card at 400000 Hz
>>> ...
>>> [ 5.956237] mmc0: error -110 whilst initialising SD card
>>>
>>
>> Are you sure that some subsystem that you deactivate don't change
>> pin muxing setting? Can you check in the broken system if the pins of the sdcard
>> are correctly muxed? Does it happen even if you change the sdcard?
>
> Did you try to add this patch series:
>
> http://www.spinics.net/lists/linux-omap/msg103264.html
>
> Without it I'm also having problems with MMC detection on some OMAP3 based boards.
>
> Balaji, what is the status of this patch series? Are there any chances that it will be included in v3.14?
>
Due to dependencies between regulator, mmc, omap def config, devicetree changes,
I am hoping either Chris or Tony pick the whole series for 3.15
Couple of tested-by will surely help.
Thanks and Regards,
Balaji T K
next prev parent reply other threads:[~2014-02-26 8:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-25 23:47 SD card timeout problems on Nokia N900 (omap_hsmmc on OMAP3) Sebastian Reichel
2014-02-26 6:02 ` Michael Trimarchi
2014-02-26 6:55 ` Stefan Roese
2014-02-26 8:44 ` Balaji T K [this message]
2014-02-26 17:03 ` Tony Lindgren
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