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driver: gpio: Add sleep delay in gpio isr #99080

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driver: gpio: Add sleep delay in gpio isr #99080

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35 changes: 35 additions & 0 deletions drivers/gpio/gpio_rts5912.c
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,9 @@
#include "zephyr/drivers/gpio/gpio_utils.h"
#include <zephyr/logging/log.h>
#include <zephyr/dt-bindings/gpio/realtek-gpio.h>
#include <zephyr/pm/pm.h>
#include <zephyr/pm/policy.h>
#include <zephyr/sys/atomic.h>

#include <reg/reg_gpio.h>

Expand All @@ -33,6 +36,22 @@ struct gpio_rts5912_data {
sys_slist_t callbacks;
};

#if defined(CONFIG_PM)
#define GPIO_EXPIRED_TIMEOUT_MS 1000
static struct k_work_delayable gpio_wake_delay_work;
static atomic_t gpio_wake_hold; /* 0: no hold, 1: holding */
static atomic_t gpio_wake_init_once; /* 0: not inited, 1: inited */

static void gpio_wake_delay_work_handler(struct k_work *work)
{
ARG_UNUSED(work);

if (atomic_cas(&gpio_wake_hold, 1, 0)) {
pm_policy_state_lock_put(PM_STATE_SUSPEND_TO_IDLE, PM_ALL_SUBSTATES);
}
}
#endif /* CONFIG_PM */

static int pin_is_valid(const struct gpio_rts5912_config *config, gpio_pin_t pin)
{
if (pin >= config->num_pins) {
Expand Down Expand Up @@ -455,6 +474,14 @@ static void gpio_rts5912_isr(const void *arg)
if (gcr[pin] & GPIO_GCR_INTSTS_Msk) {
gcr[pin] |= GPIO_GCR_INTSTS_Msk;

#if defined(CONFIG_PM)
if (atomic_cas(&gpio_wake_hold, 0, 1)) {
pm_policy_state_lock_get(PM_STATE_SUSPEND_TO_IDLE, PM_ALL_SUBSTATES);
}
k_work_reschedule(&gpio_wake_delay_work,
K_MSEC(GPIO_EXPIRED_TIMEOUT_MS));
#endif

gpio_fire_callbacks(&data->callbacks, port, BIT(pin));
}
irq_unlock(key);
Expand Down Expand Up @@ -567,6 +594,14 @@ static DEVICE_API(gpio, gpio_rts5912_driver_api) = {
{ \
if (!(DT_INST_IRQ_HAS_CELL(id, irq))) { \
return 0; \
} \
\
if (IS_ENABLED(CONFIG_PM)) { \
if (atomic_cas(&gpio_wake_init_once, 0, 1)) { \
k_work_init_delayable(&gpio_wake_delay_work, \
gpio_wake_delay_work_handler); \
atomic_clear(&gpio_wake_hold); \
} \
} \
\
RTS5912_GPIO_DTNAMIC_IRQ(id) \
Expand Down