Date and time wrong on TX2

[DaveYYY]

Hi,

you have to switch to rtc0 for the system to keep time after rebooting.
Some posts FYI:

RTC can't hold time the after system rebooted in L4T 35.1

Hi NV RTC can’t hold the after system rebooted in L4T 35.1 version AGX Xavier developer kit I confirmed it worked fine in L4T 32.71 with same developer kit. Here is my steps: (1) Set system date and RTC time and read it back. [Screenshot from 2022-10-25 11-19-51] (2) System reboot. Then read system date and RTC time again. The red block of the following image showed that RTC time became a wrong value. [Screenshot from 2022-10-25 11-20-25]

AGX Orin: rtc0 vs rtc1

There are 2 real time clocks on Orin: rtc0 and rtc1. The rtc0 can be supported by the battery, but rtc1 cannot. The kernel however is configured to sync time with rtc1, which causes the time to be incorrect at the boot, until it is synced with network time. Are there specific reasons for kernel using rtc1? Are there any known issues with re-configuring the kernel to use rtc0?