How can I set gpio as persistent status?

[billy-tsai]

I want to set the GPIO to the persistent status to avoid the gpio pin status changed after the system reset.
Does GPIO have any configuration flag that can be used for this purpose when I call gpio_pin_configure()?

[yashi]

Short answer: No.

By persistent, if you mean:

• across a reboot, no you can't. It will be reset to the hardware reset state
• in a device driver, no I don't think we have it. We only have
  • pin_configure()
  • port_get_raw()
  • port_set_masked_raw()
  • port_set_bits_raw()
  • port_clear_bits_raw()
  • port_toggle_bits()
  • pin_interrupt_configure()
  • manage_callback()
  • get_pending_int()

I don't see any flag for persistence for pin_configure(). But the type of flags is

typedef uint32_t gpio_flags_t;

You might be able to implement your own device driver with a special flag.

ref) zephyr/include/drivers/gpio.h