Re: [PATCH v2 3/5] mmc: dw_mmc: Add exynos resume_noirq callback toclear WAKEUP_INT

From: Doug Anderson
Date: Tue Aug 06 2013 - 17:36:27 EST


On Wed, Jul 31, 2013 at 9:18 AM, Doug Anderson <dianders@xxxxxxxxxxxx> wrote:
> Seungwon,
> On Mon, Jul 15, 2013 at 5:09 AM, Seungwon Jeon <tgih.jun@xxxxxxxxxxx> wrote:
>> Sorry for late response.
>> Yes, it's not clear.
>> If you get the confirmation, could you share this problem?
>> Possibly, auto-clear may not be implemented.
>> Then, manual should be correct.
> I just got an update from my contacts. They confirm that bit 11 is
> not automatically cleared and that writing to it will clear it.
> Hopefully this information will make it into the next version of any
> documentation that you receive as well.
> It is still unclear exactly why the WAKEUP_INT was being asserted on
> our board despite the fact that all of the wakeup control signals
> (bits 10:8) were 0. That is still being investigated.

I have further confirmed from my contacts at Samsung that this is a
real silicon errata and that clearing the WAKEUP_INT as I am doing in
this series is the right workaround.

New patch coming shortly based against ToT linux
(v3.11-rc4-20-g0fff106). I have confirmed that it applies cleanly to
mmc-next, though I haven't tried booting with that tree.
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