Re: [RFC 1/5] devcore introduce wakeup_event callback

[David Brownell <david-b@pacbell.net>]

On Tuesday 09 September 2008, Alan Stern wrote:
> What about case (c): The device uses legacy PM but the wakeup settings 
> have already been handled by the ACPI AML code?  There's no need to 
> clear any extra wakeup-related stuff, but it still is necessary to tell 
> the driver about the event.

Good question ... best if Intel answers it.  :0


> (As a matter of fact, I have no idea whether or not Intel's legacy PM 
> for UHCI is implemented in AML.  It may vary from one BIOS to another.)

One data point:  on the laptop used to type this message,
the GPE code block includes stuff like this for each UHCI:

        Method (_L0C, 0, NotSerialized)
        {
            Notify (\_SB.PCI0.USB3, 0x02)
        }

Without diving into the ICHx specs (which I believe DO have
such details, thanks be!), my first reaction is that this is
not a "case (c)".  Of course, the rest of the AML code is,
as usual, cryptic (I'd rather have C code), and such stuff
might be hidden elsewhere in the event sequence.

- Dave
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