Compute Module • Question on Enabling PCF85063AT RTC alarm on CM4

After searching through all the forum topics, I did get my PCF85063a on my CM4 IO board to be recognized and HW clock and time keeping works fine. But, I cannot get RTC wakeup interrupt either by using "rtcwake" Or by other wakealarm file write methods (standard linux driver commands). I am not understanding when PCF85053a support driver can support rtc0 HW clock read etc - why it cannot support RTC wakeup event setting up. All my shell commands return either silent failure OR say "wakeup" directory does not exist and I did see that only power state directory exists but no wakeup directory (/sys/class/rtc/rtc0) and hence probably cannot set wakeup events

At the end of the day, I am unable to setup a wakeup event.

I have tried following statements:
dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi OR dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi, wakeup-source in config file

Both make my RTC time keeping work but no success in setting up wakeup event.

Any help is appreciated.
Sham Datta

Statistics: Posted by instinct-pi — Sat Jul 20, 2024 8:12 am — Replies 0 — Views 12

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