[Trac #224] Want IRQ on power/battery status change.

[Dan Williams]

On Mon, 2006-10-23 at 15:26 -0400, Jeff Kinz wrote:
> On Mon, Oct 23, 2006 at 07:18:29PM -0000, Zarro Boogs per Child wrote:
> > #224: Want IRQ on power/battery status change.
> > ----------------------+-----------------------------------------------------
> >  Reporter:  dwmw2     |       Owner:  mfoster
> >      Type:  defect    |      Status:  new    
> >  Priority:  normal    |   Milestone:  BTest-1
> > Component:  hardware  |    Keywords:         
> > ----------------------+-----------------------------------------------------
> >  Polling is bad. We have to wake the CPU for it. We should get an interrupt
> >  when AC power is removed or applied, when status bits change in the
> >  battery status, etc. Perhaps even when the percentage charge changes.
> > 
> > Ticket URL: <http://dev.laptop.org/ticket/224>
> > One Laptop Per Child <http://laptop.org/>
> > 
> 
> Sounds like a job for Dbus?

No, not at the driver level it's not.  I assume David is talking about
the driver needing to poll the hardware for status, which way way below
the level dbus operates.  Where DBus comes into this is with HAL; HAL
would monitor the events from the driver (which come in via interrupt),
and then broadcast a DBus signal that the status has changed for some
particular piece of hardware.

dan

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