Re: List archive broken / H5450 headphone socket

Phil,
  I just did a quick google for that doc but turned up short. Do you know
if it is available online anywhere?
It would be a great addition to the other docs in
http://www.handhelds.org/platforms/hp/ipaq-hh5xxx

...I'll grab a copy of devmem2 -- good advice.

Thanks,
Jim

Phil Blundell wrote:
>
> Jim,
>
> The iPAQ_H5400_System_Programming_Information.doc document describes
> this gpio as "HP_Detect", but this is not completely authoritative.
> Also, my recollection is that Luca's original patch was successfully
> using this gpio to generate interrupts when the headphones were inserted
> and removed.
>
> It would be easy to confirm the behaviour of that pin with devmem2, by
> watching the state of the corresponding bit in GPLR2 when you insert and
> remove the headphone plug.
>
> p.
>
> On Fri, 2005-03-25 at 15:44 -0500, Jim Kaba wrote:
> > Phil,
> > Do you have it on pretty good authority that GPIO76 is really a headphone
> > detect input? I'm about to take a quick look at this issue -- I know that
> > the ak4535 has headset detection circuitry and headset state
> > (plugged/unplugged) is accessible via it's control registers...but do you
> > know for sure that this functionality is duplicated or otherwise tied in to
> > a PXA GPIO line?
> >
> > Jim
> >
> > Phil Blundell wrote:
> > >
> > > On Sat, 2005-03-19 at 20:38 +0700, Ross Golder wrote:
> > > > When I get some time, I'll try to hack that code into a panel applet
> > > > that can switch between the main speaker or the headphones. Although it
> > > > begs the question - is the 5450 capable of recognising when there are
> > > > headphones connected and trigger it automatically (no need for a manual
> > > > user control)?
> > >
> > > Yes. GPIO76 is the headphone detect input, and you can configure it to
> > > generate an interrupt. Luca De Cicco did have a go at writing a kernel
> > > patch to make use of that, but as far as I know he was never able to get
> > > it working properly. You should be able to find his code in the
> > > archives for this list, if you want to try to fix that yourself.
> > >
> > > p.
> > >
> > > _______________________________________________
> > > H5400-port mailing list
> > > H5400-port_at_handhelds.org
> > > https://www.handhelds.org/mailman/listinfo/h5400-port
> >

-- 
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James T. Kaba                   
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