altos/stm: clean up ao_exti_enable

Was computing (1 << pin) twice for no good reason.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/stm/ao_exti_stm.c b/src/stm/ao_exti_stm.c
index 35958cf845632e37cb9c21781e7af057bd0bf173..925f9a222f50020cf9f82bad6ac0c34b9ba026da 100644 (file)
--- a/src/stm/ao_exti_stm.c
+++ b/src/stm/ao_exti_stm.c
@@ -144,7 +144,7 @@ ao_exti_enable(struct stm_gpio *gpio, uint8_t pin) {
        uint32_t        mask = (1 << pin);
        (void) gpio;
        stm_exti.pr = mask;
-       stm_exti.imr |= (1 << pin);
+       stm_exti.imr |= mask;
 }
 
 void