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This causes the suspend/resume or hwclock to use >> the wrong RTC since it takes by default rtc0. >> Force the S32G RTC to be assigned rtc0. > > We usually prefer to use the I2C RTC as rtc0 because it is battery-backed. > > What's the exact problem with using the I2C RTC as rtc0? > > Is the S32G RTC battery-backed? Hello, S32G RTC is not battery-backed. Regarding the I2C RTC(PCA85073A) commands like hwclock or rtcwake use by default /dev/rtc, /dev/rtc0 so they will try to use PCA and fail. Also from what I could find online PCA85073A is also not battery-backed. Thank you, Andrei