another dead scenario of waking up from suspend
matt_hsu at openmoko.org
Thu Oct 16 04:18:24 CEST 2008
Andy Green wrote:
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> Somebody in the thread at some point said:
> | Hi Andy,
> | Initially, I thought the why the system can't wake up is the interrupt
> | trapped in the PMU.
> | Like the following diagram:
> | http://people.openmoko.org/matt_hsu/suspend_dead/scenario_2_suspend.tif
> | channel 1: PWREN pin
> | channel 2: Power Key
> | channel 3: INT pin from PMU
> | During the system gets into suspend, you can reproduce this issue if you
> | press Power key in the last moment.
> Does it resume if you give wake interrupt another way, eg, jack insert?
I tried to charging IN to wake it up. It indeed works.
> | According to the previous mails, this issue might be resolved by set
> | interrupt type as LOW level triggered.
> | Unfortunately, I found another scenario which makes the system can't
> | wake up anymore.
> | suspending
> | http://people.openmoko.org/matt_hsu/suspend_dead/scenario_1_suspend.tif
> | Note: Unlike previous scenario, the INT pin from PMU backs to high
> | level. Basically, it should resume successfully.
> | resuming
> | http://people.openmoko.org/matt_hsu/suspend_dead/scenario_1_resume.tif
> | From the diagram, the system should be hanged somewhere.
> | Well, the later case is somehow obscure. But I leave this issue as
> | tomorrow's work. :)
> Just seems crashed somewhere generally?
Yes, I think so.
> - -Andy
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