Resume from sleep on Apalis TK1

To preserve energy, our system goes to sleep once in a while for a predetermined period.

On the TK1 Nvidia development board, we do it like this:
(e.g. sleep to 10 seconds in sleep mode lp0 )

echo 10 > /sys/class/rtc/rtc0/wakealarm
echo lp0 > /sys/power/suspend/mode
echo mem > /sys/power/state

On the apalis, the system goes to sleep but does not wake back up.

Any idea?

Down the road, we want to wake up from an analog signal, so we’d like to put the whole system asleep except for the auxiliary Cortex who would monitor an analog signal, and wake up the other cores + peripherals.

Any examples for how to achieve this?


So far we do only support lp1 on Apalis TK1 see the following ticket.

Jetpack 21.5 (how do I determine version for Apalis

Upon boot U-Boot will log this to the serial debug console.

& Ixora?)

The Carrier board version is only visible on its sticker.