PPS On Jetson Nano

[abc_ghm]

Hi Trumany,

I checked it, but I believe there should be a easier way to achieve it. The chip after TX1 can support the PPS.

I followed PPS drivers not installing - Jetson TX2 - NVIDIA Developer Forums, and enable the pps from the kernel, but it shows the time out every time when I

sudo ppstest /dev/pps0

For more detail, I added the pps device to the device tree (pin 18):

Linux_for_Tegra/sources/hardware/nvidia/soc/t210/kernel-dts/tegra210-soc/tegra210-soc-base.dtsi

pps {
        gpios = <&gpio TEGRA_GPIO(B, 7) 0>;

        compatible = "pps-gpio";
        status = "okay";
    };

I want to know is there any easier way to make it work?

Thanks

I think I fix this issue because it’s physical pin 18 and gpio15 (Sysfs GPIO) and I use the wrong pin to get PPS signal.