If your case is let several structs use a pin as you said, you would just clone the pin, or use the freestanding fn without ownership, eg:

```rust
let my_pin = Pin::new(Port::A, 0);

let struct_a = Struct {
    pin: my_pin.clone()
}

let struct_b = Struct {
    pin: my_pin()
}

// or not own anything:

impl Struct {
    fn set_pin(&self) {
        gpio::set_low(self.port, self.pin);
    }
}

```