On 12/15/06, Anton Vorontsov <cbou_at_mail.ru> wrote:
> On Thu, Dec 14, 2006 at 07:49:11PM -0500, Kevin O'Connor wrote:
> > Hi Anton,
> >
> > I finally got HTC Apache up and going with 2.6.19, and I was able to
> > test your patch.
> >
> > It seems to work great!
> >
> > In the past, the device would lockup when I enabled cpu-freq. So far,
> > everything is stable with your patch.
> >
> > -Kevin
>
> Much thanks Kevin!
>
> Intermediate results:
> - I see no problems on hx4700
> - HTC Apache seems not have any issues so far
> - HTC Universal reported to have issues using high frequences, and still
> nobody knows why.
HTC Magician has suspend/resume issues at higher frequencies,
but otherwise it seems to work fine up to 624 MHz so far even
though it's a pxa272 (rated 416 MHz max - I don't know what
this might do to the integrated flash...)
Oh, and when I modprobe cpu-pxa the LCD flickers a little during the first
frequency switch.
> No results from Asus guys regarding my patch, yet. Though, I've received
> mail from Michal Sroczynski, regarding why Asus using full featured PWR_I2C:
>
> "Only reason was speed. But it makes difference, because iirc pxa switches
> frequency faster than i2c sends byte. And sequencer is 2.5 times slower.
> I don't remember exact numbers, but i think it's worth a little complication
> to have much faster frequency switches."
>
> Which sounds a bit unconvincing, because pxa27x_voltage rising voltage
> prior to rise frequency, and drops it after freq downgrade, thus there
> should no any timing or other fatal drawbacks using sequencer.
>
> Anyway, if Asus will report failure, then score will 2:2 (2 ports working,
> and 2 not working), and we should try using full featured PWR_I2C. :-/
>
> Thanks,
>
> -- Anton (irc: bd2)
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regards
Philipp
Received on Fri Dec 15 2006 - 11:08:24 EST
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