PTP synchronization and PPS output from Nvidia NX

[gtj]

Yeah, sorry about that. I had my directions mixed up.

We’ve had some discussions about this in the past.

Jetson Xavier hardware pps_out

Hello. I see PTP PPS output pin from RGMII in Jetson Xavier SOM Datasheet. Flexibility to control the Pulse-Per-Second (PPS) output signal (ptp_pps_o) but I can’t find this pin(or any reference to it) in punmux or in TRM I need precise PPS signal from RGMII to synchronize other hardware.

What exactly is the nvpps driver supposed to do?

and how is it supposed to be used? In reference to this thread… I’m trying to figure out exactly what the nvpps driver is supposed to do. I have the device tree set to route AON_GPIO DD-00 (40-pin header pin 27) to the driver and it creates /dev/nvpps0 but I’m not sure how to use it in relation to pps-gpio, ntpd and ptp4l. From looking at the code, it looks like it’s supposed to synchronize the phc clock to the pps input but I’m not seeing how or where it’s used. I do have AON_GPIO CC-07 (…

Time sensitive networking [TSN] on NX

the documentation on the page 25 refers to a feature ‘Precision Time Protocol (PTP)’ for System; Could you explain what sort of feature, is it? Will NX have any support of protocols: IEEE 802.1 Time Sensitive Networking (TSN)? IEEE1588v2 one-step Precision Time Protocol (PTP)?