S3C2416 fixes (gpiolib, SDHCI, compilation without FB device)

[Kukjin Kim]

Darius Augulis wrote:
> 
> On 07/08/2010 10:23 AM, Marek Szyprowski wrote:
> > Hello,
> >
> > On Tuesday, July 06, 2010 7:03 PM Darius Augulis wrote:
> >
> >> On 06/28/2010 09:01 AM, Marek Szyprowski wrote:
> >>> Hello,
> >>>
> >>> On Friday, June 25, 2010 12:56 PM Darius Augulis wrote:
> >>>
> >>>> On 06/22/2010 04:16 PM, Yauhen Kharuzhy wrote:
> >>>>> This patch series fixes SDHCI on S3C2416. I got SD card working with
> >> this
> >>>> patches
> >>>>> and with patches for GPIO card detection support by Marek
Szyprowski.
> >>>>>
> >>>>
> >>>> Unfortunately I did not get SD card working with these patches. I'm
> >>>> using custom board, not SMDK2416, but SD slot connection and
schematics
> >>>> are the same like in SMDK2416. I've tried to debug a bit this problem
> >>>> and this is what I got: kernel do detection of card insert/remove,
> >>>> driver prints messages:
> >>>>
> >>>> s3c-sdhci s3c-sdhci.1: card inserted.
> >>>> s3c-sdhci s3c-sdhci.1: card removed.
> >>>>
> >>>> Then I put some printk in s3c-sdhci driver and MMC core and found
that
> >>>> mmc_rescan() is called only once at startup and no more when
> >>>> inserting/removing SD card. Also mmc_rescan() stops at that point
where
> >>>> mmc_power_up() is called and does not return. And mmc_power_up()
stops
> >>>> where mmc_delay(10) is called and does not return too.
> >>>> Every time when inserting/removing SD card only functions
> >>>> sdhci_tasklet_card() and mmc_detect_change() are called, and nothing
> >>>> happens. Kernel doesn't detect the card inserted.
> >>>> Maybe this info could help to debug where the problem is - in my
custom
> >>>> board or in your patches?
> >>>
> >>> Have you tried with polled card detection method (SDHCI_CD_NONE)? If
it
> >>> doesn't work I suspect something with the hardware. Checking with mmc
> >> debug
> >>> enabled might also help figuring this issue out.
> >>
> >> yes, I've tried that, but didn't get sd card working. I got schematics
> >> from China manufacturer, SD card connection is the same like in
> >> smdk2416. with mmc debug enabled I found that SD card is detected when
> >> inserted or removed, but after detection card initialisation is not
> >> performed.
> >
> > Does it work without my patches or with other Linux kernel? You can try
to
> > check the custom Linux 2.6.29 from
> >
git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git
> 
> I did try with and without your patches. First, I applied only s3c2416
> realated patches from Yauhen, then I've added your patches, but nothing
> changed.
> 
> >
> > I would like to know whether my patches cause the problem or there is
some
> > kind of hardware issue with your board.
> >

Hi Darius,

Was there any progress about above issue?

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <kgene.kim at samsung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.