ONKEY interrupt is trapped in PMU occasionally on resuming
matt_hsu at openmoko.org
Mon Feb 4 15:59:29 CET 2008
When I did some experiment on reducing suspended current, I found that
the system could not resume occasionally if the power key is pressed.
Then I monitored the IRQ singal from PCF50633 to CPU, it will stay in
LOW when this pheonmenon occurs. Do you have this on your A5?
I try to find some solutions like the following:
- Change the i2c clock as almost 100K
- modify the sequence of registering platform device
But these two approaches could not eliminate this issue.
So I tried to use i2cdump to read PCF50633 after every suspend/resume
process. This issue would not happen anymore. Obviously, INTs of
PCF50633 are not read & clear indeed as resuming occasionally.
Do you think we have to check the value we read from INT1~INT5? INT2 is
0xff when this issue occurs, but the EXTON1~EXTON3 is connected to
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