Touchpad testing.

[Tom Sylla]

look at SERIRQ. It will probably be in continuous mode, where it 
shouldn't be or the polarity settings will be wrong. None of the EC init 
is being done, there is no "super I/O" configured into LB. The 5536 
config is a best guess back when the EC spec was not available, so that 
is probably wrong too. If you look at the PS/2 and SERIRQ at the same 
time, the answer will just fall out.

Mitch Bradley wrote:
> These pictures show what happens on the OLPC board when you
> 
> a) Don't drain the queue (QueueHoldoff.png)
> b) Drain the queue every so often (RateControl.png)
> 
> Conclusion: the EC is able to handle normal-rate mouse reports when the
> software services it at the correct rate.