Using Nvidia AGX Orin GPIO pins to recieve a PPS signal

[DaveYYY]

Hi,

Two things for you to do:

1. Enable PPS support in kernel config.
2. Set the pin you want to use for PPS in device tree.

Similar to what this guy did:

Can't enable PPS on Jetson AGX Xavier

hello user64336, you’re adding the code snippet to the wrong dtsi files. let me double check, you’re working with Xavier series, right? it’s Xavier using t194; whereas t234 is used by Orin series. BTW, you should also configure CONFIG_PPS_CLIENT_GPIO=m, please check this is set in tegra_defconfig as well please build, and manually copy device tree blob to target. after adding the PPS GPIO with insmod, /dev/pps1 should shown. you could test with pps utility, $ sudo apt install pps-tools …

Also, if you need GUI for your work, remember to re-build display drivers when you re-build the kernel image.