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Merge pull request #17687 from benpicco/cpu/saml21-EXTWAKE

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cpu/sam0_common: implement EXTWAKE for SAM L21
This commit is contained in:
Dylan Laduranty 2022-02-22 21:49:24 +01:00 committed by GitHub
commit fb24a54208
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1 changed files with 47 additions and 3 deletions
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50
cpu/sam0_common/periph/gpio.c
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@ -274,11 +274,47 @@ static bool _rtc_irq_enabled(void)
return false;
}
static int _set_extwake(gpio_t pin, bool on)
{
#ifdef REG_RSTC_WKEN
uint8_t idx = _pin_pos(pin);
/* PA0 - PA7 are EXTWAKE pins */
if ((idx > 7) || (_port(pin) != _port(GPIO_PIN(PA, 0)))) {
return -1;
}
if (on) {
RSTC->WKEN.reg |= 1 << idx;
} else {
RSTC->WKEN.reg &= ~(1 << idx);
}
return idx;
#else
(void)pin;
(void)on;
return -1;
#endif
}
static void _init_rtc_pin(gpio_t pin, gpio_flank_t flank)
{
if (IS_ACTIVE(MODULE_PERIPH_GPIO_TAMPER_WAKE)) {
rtc_tamper_register(pin, flank);
}
#ifdef REG_RSTC_WKEN
int idx = _set_extwake(pin, true);
if (idx < 0) {
return;
}
if (flank == GPIO_RISING) {
RSTC->WKPOL.reg |= 1 << idx;
} else {
RSTC->WKPOL.reg &= ~(1 << idx);
}
#endif
}
int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
@ -418,10 +454,13 @@ void gpio_irq_enable(gpio_t pin)
}
/* clear stale interrupt */
_EIC->INTFLAG.reg = (1 << exti);
_EIC->INTFLAG.reg = 1 << exti;
/* enable interrupt */
_EIC->INTENSET.reg = (1 << exti);
_EIC->INTENSET.reg = 1 << exti;
/* enable wake from deep sleep */
_set_extwake(pin, true);
}
void gpio_irq_disable(gpio_t pin)
@ -430,7 +469,12 @@ void gpio_irq_disable(gpio_t pin)
if (exti == -1) {
return;
}
_EIC->INTENCLR.reg = (1 << exti);
/* disable interrupt */
_EIC->INTENCLR.reg = 1 << exti;
/* disable wake from deep sleep */
_set_extwake(pin, false);
}
#if defined(CPU_COMMON_SAML1X)