AnsweredAssumed Answered

Alarm can't wake up system from sleep state

Question asked by Jesse Lee on May 26, 2019
Latest reply on May 27, 2019 by igorpadykov

I am using iMX6q to build a system based on Android 5.0. On the system I have an external RTC chip which is powered by a separate battery. The external RTC chip does not have an interrupt line connected iMX.

 

The external RTC chip is registered under /sys/class/rtc/rtc0. The other rtc of imx6 platform is 20cc034.snvs-rtc-lp and registered under /sys/class/rtc/rtc1(rtc1 used by alarm.).

 

When I set a alarm, it can't wake up the system from sleep state sometimes, but when the alarm time is past, then I wake up the system manually, the alarm fired immediately.

 

Anyone know how to fix it?

Thanks.

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