Re: [PATCHv10 05/14] OMAP2+: mux: add support for PAD wakeup interrupts

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Tero Kristo <t-kristo@xxxxxx> writes:

> On Fri, 2011-12-09 at 15:13 -0800, Kevin Hilman wrote:
>> Tero Kristo <t-kristo@xxxxxx> writes:
>> 
>> > OMAP mux now provides a service routine to parse pending wakeup events
>> > and to call registered ISR whenever active wakeups are detected. 
>> 
>> Good.
>> 
>> > This routine is called directly from PRCM interrupt handler.
>> 
>> I think this comment is out of date with the code, since you're now
>> using a shared IRQ and the interrupt is directly called from the IRQ
>> core.
>> 
>> I'd update the changelog here just commenting on what this IRQ is shared
>> with, and how the interrupts are shared.
>> 
>> Also, a question on optimization.  For every IO wakeup, this will go
>> through the list of *all* enabled hwmods.  This could be pretty expensive
>> with lots of wakeups.  Maybe we should have another flag for hwmods that
>> have wakeups enabled so walking the list of potential wakeup-capable
>> hwmods will be as fast as possible.
>
> Optimization of this code is sure possible, and probably even desirable.
> In some of the earlier sets I had a separate list for the pad scan, but
> it was dropped out due to some comments. It would be possible to add
> either a separate list for these within omap_hwmod / mux, or either a
> flag which checks for enabled io wakeups.

OK, if you prefer, we can optimize in a future patch so we can still
target v3.3 for this series.

Kevin
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