JP6.0 RTC sync to system

[jb035.cheng]

We use rtc1 on our customized orin carrier board. When the L4T is 35.4.1, it works by setting the below kernel config to rtc1
CONFIG_RTC_HCTOSYS_DEVICE=“rtc1”
CONFIG_RTC_SYSTOHC_DEVICE=“rtc1”

But it does not work on JP6.0/L4T 36.2.0, hwclock app always opens rtc0, and causes error.
If set open device to rtc1, the hwclock can read/write rtc time.
This topic shows two sciprts may solve this issue

External RTC sync to system

I don’t think this is same as my situation, I have alrealy modified kernel config like this CONFIG_RTC_LIB=y CONFIG_RTC_CLASS=y CONFIG_RTC_HCTOSYS=y CONFIG_RTC_HCTOSYS_DEVICE="rtc2" CONFIG_RTC_SYSTOHC=y CONFIG_RTC_SYSTOHC_DEVICE="rtc2" and my external rtc regist as rtc2 as dmesg show. I can set time into it by hwclock -w and after poweroff for minutes and reboot I can see it hold time as well. The question is system do not read time from it and only by sudo hwclock --hctosys --rtc /dev/rtc c…

I have modified /etc/init.d/hwclock.sh to rtc1, but it does not work.
But I can’t find /etc/systemd/nvrtc-sync-boot.sh in my rootfs, I have check rootfs of L4T 32.7.x, 34.1.x, 35.x,and 36.2.0.
Where can I get this script ?

[ShaneCCC]

Please confirm manual run the /etc/init.d/hwclock.sh is working make sure the system run it at the system start up, it not add it.

Thanks