Dtoverlay=gpio-shutdown behavior on Jetson Nano?

I’m looking to migrate a project from a Raspberry Pi to the Jetson Nano and one behavior I’d like to cross over is the ability to pull a pin high after the Jetson has safely shut down. For the Raspberry Pi I simply put dtoverlay=gpio-poweroff,gpiopin=17 in /boot/config.txt. I did a bit of research and the only lead I have so far is setting “pinmux” configurations by flashing the Jetson. However, I couldn’t find any descriptors that seemed to give the behavior I want.

What I need precisely is any single pin on the GPIO header to flip high (and stay high) to at least 3.3V after a shutdown (not a reboot) routine completes.

Thanks in advance!

hello woz4tetra,

there’re several approaches for your reference to access GPIO for usage.

  1. you may control GPIO pin via system nodes, shown some sample to export pin for controlling.
* Generate gpio220 name
echo 220 > /sys/class/gpio/export

* Configure GPIO manually
echo 1 > /sys/class/gpio/gpio220/value
  1. please access L4T sources via download center. check below header file for GPIO APIs.
    you may have implementation and control them in the kernel drivers.
    for example,
static inline int gpio_get_value(unsigned int gpio)
        return __gpio_get_value(gpio);

static inline void gpio_set_value(unsigned int gpio, int value)
        __gpio_set_value(gpio, value);
  1. you may also refer to Jetson-gpio python library, whihc enables the use of Jetson’s GPIOs.