Nvidia Orin nano RTC kernel compile problem

[liyongru1998]

你好，我有一塊自訂義Nvidia Orin Nano 4G JP5.1.2，設定RTC重新啟動時間會回1970。
根據其他

AGX Orin: rtc0 vs rtc1

Hi, rtc0 is supported by other power management IC, while rtc1 is inside the Tegra SoC itself. We set rtc1 as default because it runs on TSC (Time Stamp Counter), and has higher accuracy. You may config the udev rules as follow if you want to use rtc0: inside /lib/udev/rules.d/50-udev-default.rules SUBSYSTEM==“rtc”, ATTR{hctosys}==“0”, SYMLINK+=“rtc” SUBSYSTEM==“rtc”, KERNEL==“rtc0”, SYMLINK+=“rtc”, OPTIONS+=“link_priority=-100” Or change CONFIG_RTC_HCTOSYS_DEVICE in kernel config and bu…

/lib/udev/rules.d/50-udev-default.rules方法時間還是會回1970。
我嘗試改 CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
我依照Kernel Customization — Jetson Linux Developer Guide documentation

To Build the Kernel完成至第7步

我使用下方指令燒錄，但zcat /proc/config.gz | grep CONFIG_RTC_HCTOSYS_DEVICE
依舊為rtc1。
sudo ./flash.sh -c bootloader/t186ref/cfg/flash_t234_qspi.xml jetson-orin-nano-devkit internal
請問是有缺步驟嗎?

7.後面這也要做嗎?

[ShaneCCC]

I think you can just copy the Image to boot/Image to apply your kernel by modify the /boot/extlinux/extlinux.conf

Thanks

[liyongru1998]

備份boot/Image，將kernel_out/arch/arm64/boot/Image取代boot/Image
燒入指令
sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device sda1
-c tools/kernel_flash/flash_l4t_external.xml -p “-c bootloader/t186ref/cfg/flash_t234_qspi.xml”
–showlogs --network usb0 jetson-orin-nano-devkit internal

zcat /proc/config.gz | grep CONFIG_RTC_HCTOSYS_DEVICE依舊為rtc0

更改RTC設定編譯需要接SSD嗎?還只需要重新燒QSPI就好?

[ShaneCCC]

What’s the rtc link to?

ls -al /dev/rtc*

[liyongru1998]

[ShaneCCC]

Did you check the kernel by “uname -a” to confirm applied your kernel?

[liyongru1998]

我剛剛確認應該是沒有

[ShaneCCC]

Then you can just copy the Image from your build tree to Orin Nano and modify the /boot/extlinux/extlinux.conf to apply your kernel to try.

Thanks