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drivers: watchdog: nrfx: add synchronization after stop #83776

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merged 1 commit into from
Jan 14, 2025
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drivers: watchdog: nrfx: add synchronization after stop #83776

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28 changes: 25 additions & 3 deletions drivers/watchdog/wdt_nrfx.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
* SPDX-License-Identifier: Apache-2.0
*/

#include <zephyr/kernel.h>
#include <zephyr/sys/math_extras.h>
#include <nrfx_wdt.h>
#include <zephyr/drivers/watchdog.h>
Expand All @@ -13,11 +14,18 @@
#include <zephyr/irq.h>
LOG_MODULE_REGISTER(wdt_nrfx);

#if !CONFIG_WDT_NRFX_NO_IRQ && NRF_WDT_HAS_STOP
#define WDT_NRFX_SYNC_STOP 1
#endif

struct wdt_nrfx_data {
wdt_callback_t m_callbacks[NRF_WDT_CHANNEL_NUMBER];
uint32_t m_timeout;
uint8_t m_allocated_channels;
bool enabled;
#if defined(WDT_NRFX_SYNC_STOP)
struct k_sem sync_stop;
#endif
};

struct wdt_nrfx_config {
Expand Down Expand Up @@ -73,6 +81,10 @@ static int wdt_nrf_disable(const struct device *dev)
return -EFAULT;
}

#if defined(WDT_NRFX_SYNC_STOP)
k_sem_take(&data->sync_stop, K_FOREVER);
#endif

nrfx_wdt_channels_free(&config->wdt);

for (channel_id = 0; channel_id < data->m_allocated_channels; channel_id++) {
Expand Down Expand Up @@ -170,11 +182,17 @@ static DEVICE_API(wdt, wdt_nrfx_driver_api) = {
static void wdt_event_handler(const struct device *dev, nrf_wdt_event_t event_type,
uint32_t requests, void *p_context)
{
struct wdt_nrfx_data *data = dev->data;

#if defined(WDT_NRFX_SYNC_STOP)
if (event_type == NRF_WDT_EVENT_STOPPED) {
k_sem_give(&data->sync_stop);
}
#else
(void)event_type;
#endif
(void)p_context;

struct wdt_nrfx_data *data = dev->data;

while (requests) {
uint8_t i = u32_count_trailing_zeros(requests);

Expand Down Expand Up @@ -217,7 +235,11 @@ static void wdt_event_handler(const struct device *dev, nrf_wdt_event_t event_ty
} \
return 0; \
} \
static struct wdt_nrfx_data wdt_##idx##_data; \
static struct wdt_nrfx_data wdt_##idx##_data = { \
IF_ENABLED(WDT_NRFX_SYNC_STOP, \
(.sync_stop = Z_SEM_INITIALIZER( \
wdt_##idx##_data.sync_stop, 0, 1),)) \
}; \
static const struct wdt_nrfx_config wdt_##idx##z_config = { \
.wdt = NRFX_WDT_INSTANCE(idx), \
}; \
Expand Down
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