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gpio: stm32: support disabling and reenabling interrupts on pin

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Up to now interrupts could be only configured once, with no way to
disable them in runtime.

Allow interrupts to be disabled in runtime and then properly reenabled
on user request. This allows to ignore interrupts when software is not
expecting them.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
This commit is contained in:
Marcin Niestroj 2019-08-09 13:32:42 +02:00 committed by Kumar Gala
parent b42ad680c5
commit 0951ce2d34
1 changed files with 8 additions and 2 deletions
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10
drivers/gpio/gpio_stm32.c
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@ -288,8 +288,11 @@ static int gpio_stm32_config(struct device *dev, int access_op,
return -EIO;
}
if (IS_ENABLED(CONFIG_EXTI_STM32) && (flags & GPIO_INT) != 0) {
if (!IS_ENABLED(CONFIG_EXTI_STM32)) {
goto release_lock;
}
if (flags & GPIO_INT) {
if (stm32_exti_set_callback(pin, cfg->port,
gpio_stm32_isr, dev) != 0) {
return -EBUSY;
@ -318,9 +321,12 @@ static int gpio_stm32_config(struct device *dev, int access_op,
if (stm32_exti_enable(pin) != 0) {
return -ENOSYS;
}
} else {
stm32_exti_disable(pin);
stm32_exti_unset_callback(pin);
}
release_lock:
#if defined(CONFIG_STM32H7_DUAL_CORE)
LL_HSEM_ReleaseLock(HSEM, LL_HSEM_ID_1, 0);
#endif /* CONFIG_STM32H7_DUAL_CORE */