+#define ao_disable_port(port) do { \
+ if ((port) == &stm_gpioa) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIOAEN); \
+ else if ((port) == &stm_gpiob) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIOBEN); \
+ else if ((port) == &stm_gpioc) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIOCEN); \
+ else if ((port) == &stm_gpiod) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIODEN); \
+ else if ((port) == &stm_gpioe) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIOEEN); \
+ } while (0)
+