How to enable pps-gpio for pps in with driver agx orin devkit

Please provide the following info (tick the boxes after creating this topic):
Software Version
DRIVE OS 6.0.6
[*] DRIVE OS 6.0.5
DRIVE OS 6.0.4 (rev. 1)
DRIVE OS 6.0.4 SDK
other

Target Operating System
[*] Linux
QNX
other

Hardware Platform
DRIVE AGX Orin Developer Kit (940-63710-0010-300)
DRIVE AGX Orin Developer Kit (940-63710-0010-200)
DRIVE AGX Orin Developer Kit (940-63710-0010-100)
DRIVE AGX Orin Developer Kit (940-63710-0010-D00)
DRIVE AGX Orin Developer Kit (940-63710-0010-C00)
[*] DRIVE AGX Orin Developer Kit (not sure its number)
other

SDK Manager Version
[*] 1.9.2.10884
other

Host Machine Version
[*] native Ubuntu Linux 20.04 Host installed with SDK Manager
native Ubuntu Linux 20.04 Host installed with DRIVE OS Docker Containers
native Ubuntu Linux 18.04 Host installed with DRIVE OS Docker Containers
other

The drive agx orin devkit is P3710F, i need to use GPSD and chrony for time sync with GPS, so /dev/pps0 is needed, but there is no /dev/pps0 device node in the linux /dev directory。
1、Is there a GPIO for PPS-IN in the P3710F devkit?
2、How to enable pps-gpio funtion in the linux?
3、How to get the linux source code?How to compile and flash the linux kernel for the devkit?
4、Is there a drive os version which has already enabled PPS-GPIO in with P3710F?

Thanks

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