Messages in this thread | | | From | Matthijs van Duin <> | Date | Wed, 2 Dec 2015 01:10:10 +0100 | Subject | Re: [PATCH 05/10] ARM: OMAP2+: Disable GPIO softreset for dm81xx |
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On 2 December 2015 at 00:38, Tony Lindgren <tony@atomide.com> wrote: > Looks like GPIO softreset status bit on both dm8168 and dm8148 > is broken and only goes high initially. After writing to sysc > softreset bit, the resetdone bit never goes high again.
The resetdone bit works fine, but it needs all clocks active to come up. You're neglecting to enable the debounce clock to the GPIO module:
> # mw.l 0x4818155c 0x2
That should write 0x102 instead.
You can disable the debounce clock after resetting the module if you don't need it, though I doubt there's any significant power savings there. (More likely it exists as a separate bit to allow it to stay enabled even if the module isn't, for wakeup on debounced inputs.)
Matthijs
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