diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 68bc29e6e79e..ffbdc4642ea5 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -36,10 +36,10 @@
 #include <linux/errno.h>	/* For the -ENODEV/... values */
 #include <linux/fs.h>		/* For file operations */
 #include <linux/init.h>		/* For __init/__exit/... */
-#include <linux/jiffies.h>	/* For timeout functions */
+#include <linux/hrtimer.h>	/* For hrtimers */
 #include <linux/kernel.h>	/* For printk/panic/... */
 #include <linux/kref.h>		/* For data references */
-#include <linux/kthread.h>	/* For kthread_delayed_work */
+#include <linux/kthread.h>	/* For kthread_work */
 #include <linux/miscdevice.h>	/* For handling misc devices */
 #include <linux/module.h>	/* For module stuff/... */
 #include <linux/mutex.h>	/* For mutexes */
@@ -67,9 +67,10 @@ struct watchdog_core_data {
 	struct cdev cdev;
 	struct watchdog_device *wdd;
 	struct mutex lock;
-	unsigned long last_keepalive;
-	unsigned long last_hw_keepalive;
-	struct kthread_delayed_work work;
+	ktime_t last_keepalive;
+	ktime_t last_hw_keepalive;
+	struct hrtimer timer;
+	struct kthread_work work;
 	unsigned long status;		/* Internal status bits */
 #define _WDOG_DEV_OPEN		0	/* Opened ? */
 #define _WDOG_ALLOW_RELEASE	1	/* Did we receive the magic char ? */
@@ -109,18 +110,19 @@ static inline bool watchdog_need_worker(struct watchdog_device *wdd)
 		(t && !watchdog_active(wdd) && watchdog_hw_running(wdd));
 }
 
-static long watchdog_next_keepalive(struct watchdog_device *wdd)
+static ktime_t watchdog_next_keepalive(struct watchdog_device *wdd)
 {
 	struct watchdog_core_data *wd_data = wdd->wd_data;
 	unsigned int timeout_ms = wdd->timeout * 1000;
-	unsigned long keepalive_interval;
-	unsigned long last_heartbeat;
-	unsigned long virt_timeout;
+	ktime_t keepalive_interval;
+	ktime_t last_heartbeat, latest_heartbeat;
+	ktime_t virt_timeout;
 	unsigned int hw_heartbeat_ms;
 
-	virt_timeout = wd_data->last_keepalive + msecs_to_jiffies(timeout_ms);
+	virt_timeout = ktime_add(wd_data->last_keepalive,
+				 ms_to_ktime(timeout_ms));
 	hw_heartbeat_ms = min_not_zero(timeout_ms, wdd->max_hw_heartbeat_ms);
-	keepalive_interval = msecs_to_jiffies(hw_heartbeat_ms / 2);
+	keepalive_interval = ms_to_ktime(hw_heartbeat_ms / 2);
 
 	if (!watchdog_active(wdd))
 		return keepalive_interval;
@@ -130,8 +132,11 @@ static long watchdog_next_keepalive(struct watchdog_device *wdd)
 	 * after the most recent ping from userspace, the last
 	 * worker ping has to come in hw_heartbeat_ms before this timeout.
 	 */
-	last_heartbeat = virt_timeout - msecs_to_jiffies(hw_heartbeat_ms);
-	return min_t(long, last_heartbeat - jiffies, keepalive_interval);
+	last_heartbeat = ktime_sub(virt_timeout, ms_to_ktime(hw_heartbeat_ms));
+	latest_heartbeat = ktime_sub(last_heartbeat, ktime_get());
+	if (ktime_before(latest_heartbeat, keepalive_interval))
+		return latest_heartbeat;
+	return keepalive_interval;
 }
 
 static inline void watchdog_update_worker(struct watchdog_device *wdd)
@@ -139,30 +144,33 @@ static inline void watchdog_update_worker(struct watchdog_device *wdd)
 	struct watchdog_core_data *wd_data = wdd->wd_data;
 
 	if (watchdog_need_worker(wdd)) {
-		long t = watchdog_next_keepalive(wdd);
+		ktime_t t = watchdog_next_keepalive(wdd);
 
 		if (t > 0)
-			kthread_mod_delayed_work(watchdog_kworker,
-						 &wd_data->work, t);
+			hrtimer_start(&wd_data->timer, t, HRTIMER_MODE_REL);
 	} else {
-		kthread_cancel_delayed_work_sync(&wd_data->work);
+		hrtimer_cancel(&wd_data->timer);
 	}
 }
 
 static int __watchdog_ping(struct watchdog_device *wdd)
 {
 	struct watchdog_core_data *wd_data = wdd->wd_data;
-	unsigned long earliest_keepalive = wd_data->last_hw_keepalive +
-				msecs_to_jiffies(wdd->min_hw_heartbeat_ms);
+	ktime_t earliest_keepalive, now;
 	int err;
 
-	if (time_is_after_jiffies(earliest_keepalive)) {
-		kthread_mod_delayed_work(watchdog_kworker, &wd_data->work,
-					 earliest_keepalive - jiffies);
+	earliest_keepalive = ktime_add(wd_data->last_hw_keepalive,
+				       ms_to_ktime(wdd->min_hw_heartbeat_ms));
+	now = ktime_get();
+
+	if (ktime_after(earliest_keepalive, now)) {
+		hrtimer_start(&wd_data->timer,
+			      ktime_sub(earliest_keepalive, now),
+			      HRTIMER_MODE_REL);
 		return 0;
 	}
 
-	wd_data->last_hw_keepalive = jiffies;
+	wd_data->last_hw_keepalive = now;
 
 	if (wdd->ops->ping)
 		err = wdd->ops->ping(wdd);  /* ping the watchdog */
@@ -195,7 +203,7 @@ static int watchdog_ping(struct watchdog_device *wdd)
 
 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);
 
-	wd_data->last_keepalive = jiffies;
+	wd_data->last_keepalive = ktime_get();
 	return __watchdog_ping(wdd);
 }
 
@@ -210,9 +218,7 @@ static void watchdog_ping_work(struct kthread_work *work)
 {
 	struct watchdog_core_data *wd_data;
 
-	wd_data = container_of(container_of(work, struct kthread_delayed_work,
-					    work),
-			       struct watchdog_core_data, work);
+	wd_data = container_of(work, struct watchdog_core_data, work);
 
 	mutex_lock(&wd_data->lock);
 	if (watchdog_worker_should_ping(wd_data))
@@ -220,6 +226,16 @@ static void watchdog_ping_work(struct kthread_work *work)
 	mutex_unlock(&wd_data->lock);
 }
 
+static enum hrtimer_restart watchdog_timer_expired(struct hrtimer *timer)
+{
+	struct watchdog_core_data *wd_data;
+
+	wd_data = container_of(timer, struct watchdog_core_data, timer);
+
+	kthread_queue_work(watchdog_kworker, &wd_data->work);
+	return HRTIMER_NORESTART;
+}
+
 /*
  *	watchdog_start: wrapper to start the watchdog.
  *	@wdd: the watchdog device to start
@@ -234,7 +250,7 @@ static void watchdog_ping_work(struct kthread_work *work)
 static int watchdog_start(struct watchdog_device *wdd)
 {
 	struct watchdog_core_data *wd_data = wdd->wd_data;
-	unsigned long started_at;
+	ktime_t started_at;
 	int err;
 
 	if (watchdog_active(wdd))
@@ -242,7 +258,7 @@ static int watchdog_start(struct watchdog_device *wdd)
 
 	set_bit(_WDOG_KEEPALIVE, &wd_data->status);
 
-	started_at = jiffies;
+	started_at = ktime_get();
 	if (watchdog_hw_running(wdd) && wdd->ops->ping)
 		err = wdd->ops->ping(wdd);
 	else
@@ -928,7 +944,9 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno)
 	if (IS_ERR_OR_NULL(watchdog_kworker))
 		return -ENODEV;
 
-	kthread_init_delayed_work(&wd_data->work, watchdog_ping_work);
+	kthread_init_work(&wd_data->work, watchdog_ping_work);
+	hrtimer_init(&wd_data->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	wd_data->timer.function = watchdog_timer_expired;
 
 	if (wdd->id == 0) {
 		old_wd_data = wd_data;
@@ -964,7 +982,7 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno)
 	}
 
 	/* Record time of most recent heartbeat as 'just before now'. */
-	wd_data->last_hw_keepalive = jiffies - 1;
+	wd_data->last_hw_keepalive = ktime_sub(ktime_get(), 1);
 
 	/*
 	 * If the watchdog is running, prevent its driver from being unloaded,
@@ -974,8 +992,7 @@ static int watchdog_cdev_register(struct watchdog_device *wdd, dev_t devno)
 		__module_get(wdd->ops->owner);
 		kref_get(&wd_data->kref);
 		if (handle_boot_enabled)
-			kthread_queue_delayed_work(watchdog_kworker,
-						   &wd_data->work, 0);
+			hrtimer_start(&wd_data->timer, 0, HRTIMER_MODE_REL);
 		else
 			pr_info("watchdog%d running and kernel based pre-userspace handler disabled\n",
 				wdd->id);
@@ -1012,7 +1029,8 @@ static void watchdog_cdev_unregister(struct watchdog_device *wdd)
 		watchdog_stop(wdd);
 	}
 
-	kthread_cancel_delayed_work_sync(&wd_data->work);
+	hrtimer_cancel(&wd_data->timer);
+	kthread_cancel_work_sync(&wd_data->work);
 
 	kref_put(&wd_data->kref, watchdog_core_data_release);
 }