Hi:
We found an issue recently.
For GPIO 126, we know we need to program the control_pbias_lite and control_wkup_ctrl, as well as gpio mux..., in order to get it work.
And we did make it work in the u-boot. Also it work fine in the Android when SD card is inserted. But if the system is boot up to Android without SD card, GPIO 126 is not functioning. And if SD is inserted after Android is up, GPIO 126 is working fine.
The control_pbias_lite = 0xB0B in the Android when SD is not present. And this value change to 0x8387 when SD card is inserted.
Looks like SD card driver has change some other settings which are also affecting GPIO 126. Does anyone have this issue before?
Could it be the SD block powered down when SD is not inserted? How could I check it?
Regards,
Hongtao