Easiest path to PPS/GPS integration with NTP

Robotics & Edge Computing Jetson Systems Jetson AGX Orin
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I have a need to have NTP synced with GPS with somewhat high fidelity using the PPS signal. I’ve seen thread after thread about people trying to do this with varying success, but it seems a moving goalpost as JP versions change.

Does anyone have the bare minimum required to do this on Orin AGX with say JP6.0? It seems PPS is already enabled in the kernel defconfig if I’m reading it correctly. It’s unclear to me if I need a kernel rebuild if I’m just modifying the devicetree. Can I just modify the devicetree on the target device to enable a GPIO for PPS and have it pick it up on boot?

Thanks for your thoughts…

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Hi chris76,

Are you using the devkit or custom board for AGX Orin?
Do you connect a GPS module on AGX Orin with PPS signal?
If so, which pin are you using for PPS signal?

To enable PPS with JP6.x, you can refer to the following threads.
PPS input to GPIO on Jetpack 6.1 - #8 by erik93
Pps_gpio interrupt not asserted - #8 by KevinFFF

Yes, if the related kernel configs have been enabled in your case, you can just enable it from device tree but you have to know the exact hex value for your pin in device tree.