Disable pullup on input

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I have several inputs defined in a module as:

gpio_request(GPIO_PIN_PD(04), PWR_CTL);
gpio_direction_input(GPIO_PIN_PD(04));
gpio_export(GPIO_PIN_PD(04),false);

When mounting the debuggfs i find that:

 gpio-100 PD4  (PWR_CTL     ) in  hi up

Is the anyway I can disable the pullup without recompiling, and if not how would be the correct way to do it in my module.

Since it says that:

void at32_select_gpio(unsigned int pin, unsigned long flags);

Should only be ised in board init.

Life's to short for waiting on slow CPU's