gpiochip_fwd_register
EXPORT_SYMBOL_NS_GPL(gpiochip_fwd_register, "GPIO_FORWARDER");
error = gpiochip_fwd_register(fwd, NULL);
ret = gpiochip_fwd_register(fwd, pctrl);
int gpiochip_fwd_register(struct gpiochip_fwd *fwd, void *data);