How to use UART0 on Orin NX, Missing in /dev

Hi,
I am using Orin NX on my custom carrier board.I want to use UART0(PIN99,PIN101),but it seem to be missing in /dev.What should I do to get it back?
Here is the flash log.
flashlog.txt (280.4 KB)

Here is what I see in /dev.

nvidia@nvidia-desktop:~$ cd /dev/
nvidia@nvidia-desktop:/dev$ ls
autofs                 capture-isp-channel57  capture-vi-channel52  loop0                nvme0n1p11          tty15         ttyGS0
block                  capture-isp-channel58  capture-vi-channel53  loop1                nvme0n1p12          tty16         ttyp0
btrfs-control          capture-isp-channel59  capture-vi-channel54  loop2                nvme0n1p13          tty17         ttyp1
bus                    capture-isp-channel6   capture-vi-channel55  loop3                nvme0n1p14          tty18         ttyp2
camchar-dbg            capture-isp-channel60  capture-vi-channel56  loop4                nvme0n1p2           tty19         ttyp3
camchar-echo           capture-isp-channel61  capture-vi-channel57  loop5                nvme0n1p3           tty2          ttyp4
capture-isp-channel0   capture-isp-channel62  capture-vi-channel58  loop6                nvme0n1p4           tty20         ttyp5
capture-isp-channel1   capture-isp-channel63  capture-vi-channel59  loop7                nvme0n1p5           tty21         ttyp6
capture-isp-channel10  capture-isp-channel7   capture-vi-channel6   loop-control         nvme0n1p6           tty22         ttyp7
capture-isp-channel11  capture-isp-channel8   capture-vi-channel60  mapper               nvme0n1p7           tty23         ttyp8
capture-isp-channel12  capture-isp-channel9   capture-vi-channel61  media0               nvme0n1p8           tty24         ttyp9
capture-isp-channel13  capture-vi-channel0    capture-vi-channel62  mem                  nvme0n1p9           tty25         ttypa
capture-isp-channel14  capture-vi-channel1    capture-vi-channel63  mqueue               nvsciipc            tty26         ttypb
capture-isp-channel15  capture-vi-channel10   capture-vi-channel64  net                  port                tty27         ttypc
capture-isp-channel16  capture-vi-channel11   capture-vi-channel65  null                 ppp                 tty28         ttypd
capture-isp-channel17  capture-vi-channel12   capture-vi-channel66  nvgpu                ptmx                tty29         ttype
capture-isp-channel18  capture-vi-channel13   capture-vi-channel67  nvhost-as-gpu        pts                 tty3          ttypf
capture-isp-channel19  capture-vi-channel14   capture-vi-channel68  nvhost-ctrl          ptyp0               tty30         ttyS0
capture-isp-channel2   capture-vi-channel15   capture-vi-channel69  nvhost-ctrl-gpu      ptyp1               tty31         ttyS1
capture-isp-channel20  capture-vi-channel16   capture-vi-channel7   nvhost-ctrl-isp      ptyp2               tty32         ttyS2
capture-isp-channel21  capture-vi-channel17   capture-vi-channel70  nvhost-ctrl-nvdec    ptyp3               tty33         ttyS3
capture-isp-channel22  capture-vi-channel18   capture-vi-channel71  nvhost-ctrl-nvdla0   ptyp4               tty34         ttyTCU0
capture-isp-channel23  capture-vi-channel19   capture-vi-channel8   nvhost-ctrl-nvdla1   ptyp5               tty35         ttyTHS0
capture-isp-channel24  capture-vi-channel2    capture-vi-channel9   nvhost-ctrl-pva0     ptyp6               tty36         ttyTHS3
capture-isp-channel25  capture-vi-channel20   char                  nvhost-ctxsw-gpu     ptyp7               tty37         ttyTHS4
capture-isp-channel26  capture-vi-channel21   console               nvhost-dbg-gpu       ptyp8               tty38         uhid
capture-isp-channel27  capture-vi-channel22   cpu_dma_latency       nvhost-gpu           ptyp9               tty39         uinput
capture-isp-channel28  capture-vi-channel23   cuse                  nvhost-isp           ptypa               tty4          urandom
capture-isp-channel29  capture-vi-channel24   disk                  nvhost-isp-thi       ptypb               tty40         usb
capture-isp-channel3   capture-vi-channel25   dma_heap              nvhost-msenc         ptypc               tty41         vcs
capture-isp-channel30  capture-vi-channel26   efi_capsule_loader    nvhost-nvcsi         ptypd               tty42         vcs1
capture-isp-channel31  capture-vi-channel27   fd                    nvhost-nvdec         ptype               tty43         vcs2
capture-isp-channel32  capture-vi-channel28   full                  nvhost-nvdla0        ptypf               tty44         vcs3
capture-isp-channel33  capture-vi-channel29   fuse                  nvhost-nvdla1        quadd               tty45         vcs4
capture-isp-channel34  capture-vi-channel3    gpiochip0             nvhost-nvjpg         quadd_auth          tty46         vcs5
capture-isp-channel35  capture-vi-channel30   gpiochip1             nvhost-nvjpg1        random              tty47         vcs6
capture-isp-channel36  capture-vi-channel31   hidraw0               nvhost-nvsched-gpu   rfkill              tty48         vcsa
capture-isp-channel37  capture-vi-channel32   hidraw1               nvhost-ofa           rtc                 tty49         vcsa1
capture-isp-channel38  capture-vi-channel33   hidraw2               nvhost-power-gpu     rtc0                tty5          vcsa2
capture-isp-channel39  capture-vi-channel34   hidraw3               nvhost-prof-ctx-gpu  rtc1                tty50         vcsa3
capture-isp-channel4   capture-vi-channel35   hugepages             nvhost-prof-dev-gpu  shm                 tty51         vcsa4
capture-isp-channel40  capture-vi-channel36   i2c-0                 nvhost-prof-gpu      snd                 tty52         vcsa5
capture-isp-channel41  capture-vi-channel37   i2c-1                 nvhost-pva0          stderr              tty53         vcsa6
capture-isp-channel42  capture-vi-channel38   i2c-10                nvhost-sched-gpu     stdin               tty54         vcsu
capture-isp-channel43  capture-vi-channel39   i2c-11                nvhost-tsec          stdout              tty55         vcsu1
capture-isp-channel44  capture-vi-channel4    i2c-2                 nvhost-tsg-gpu       tee0                tty56         vcsu2
capture-isp-channel45  capture-vi-channel40   i2c-3                 nvhost-vi0           teepriv0            tty57         vcsu3
capture-isp-channel46  capture-vi-channel41   i2c-4                 nvhost-vi0-thi       tegra_camera_ctrl   tty58         vcsu4
capture-isp-channel47  capture-vi-channel42   i2c-5                 nvhost-vi1           tegra-crypto        tty59         vcsu5
capture-isp-channel48  capture-vi-channel43   i2c-6                 nvhost-vi1-thi       tegra-nvvse-crypto  tty6          vcsu6
capture-isp-channel49  capture-vi-channel44   i2c-7                 nvhost-vic           tegra-soc-hwpm      tty60         vfio
capture-isp-channel5   capture-vi-channel45   i2c-8                 nvidia0              tty                 tty61         vhci
capture-isp-channel50  capture-vi-channel46   i2c-9                 nvidiactl            tty0                tty62         watchdog
capture-isp-channel51  capture-vi-channel47   initctl               nvidia-modeset       tty1                tty63         watchdog0
capture-isp-channel52  capture-vi-channel48   input                 nvmap                tty10               tty7          zero
capture-isp-channel53  capture-vi-channel49   kmsg                  nvme0                tty11               tty8          zram0
capture-isp-channel54  capture-vi-channel5    kvm                   nvme0n1              tty12               tty9          zram1
capture-isp-channel55  capture-vi-channel50   l3cache               nvme0n1p1            tty13               ttyAMA0       zram2
capture-isp-channel56  capture-vi-channel51   log                   nvme0n1p10           tty14               ttyCH341USB0  zram3