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drivers/interrup_controller: stm32: stm32_exti_enable could be void

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stm32_exti_enable was returning errors on line > 32 or line pointing
to non implemented line. Both conditions are hard-coded, hence there
is no use to detect them dynamically in the code.
Check them with assert. As a consequence, function could now be void.

Additionally, enable exti irq line only if both checks are passed.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
This commit is contained in:
Erwan Gouriou 2019-10-09 13:54:29 +02:00 • committed by Carles Cufí
commit 78d7b2106a
3 changed files with 11 additions and 19 deletions
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5
drivers/gpio/gpio_stm32.c
View file

@ -522,10 +522,7 @@ static int gpio_stm32_pin_interrupt_configure(struct device *dev,
stm32_exti_trigger(pin, edge);
if (stm32_exti_enable(pin) != 0) {
err = -EIO;
goto release_lock;
}
stm32_exti_enable(pin);
release_lock:
#if defined(CONFIG_STM32H7_DUAL_CORE)

23
drivers/interrupt_controller/intc_exti_stm32.c
View file

@ -89,30 +89,25 @@ struct stm32_exti_data {
struct __exti_cb cb[ARRAY_SIZE(exti_irq_table)];
};
int stm32_exti_enable(int line)
void stm32_exti_enable(int line)
{
int irqnum = 0;
/* Enable requested line interrupt */
if (line < 32) {
LL_EXTI_EnableIT_0_31(1 << line);
} else {
if (line >= ARRAY_SIZE(exti_irq_table)) {
__ASSERT_NO_MSG(line);
}
/* Get matching exti irq mathcing provided line thanks to irq_table */
if (line < ARRAY_SIZE(exti_irq_table)) {
irqnum = exti_irq_table[line];
if (irqnum == 0xFF)
return 0;
} else {
return -ENOTSUP;
/* Get matching exti irq provided line thanks to irq_table */
irqnum = exti_irq_table[line];
if (irqnum == 0xFF) {
__ASSERT_NO_MSG(line);
}
/* Enable requested line interrupt */
LL_EXTI_EnableIT_0_31(1 << line);
/* Enable exti irq interrupt */
irq_enable(irqnum);
return 0;
}
void stm32_exti_disable(int line)

2
include/drivers/interrupt_controller/exti_stm32.h
View file

@ -31,7 +31,7 @@
*
* @param line EXTI# line
*/
int stm32_exti_enable(int line);
void stm32_exti_enable(int line);
/**
* @brief disable EXTI interrupt for specific line