another dead scenario of waking up from suspend

[Andy Green]

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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?

| 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?

- -Andy
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