diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a50d82dc33e74af3378d7d58126a250f11faf749..d5b1aec5cc127fab07fab3e8a47f692b8afa294a 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1370,6 +1370,16 @@ config ASCEND_CHARGE_MIGRATE_HUGEPAGES
 	  This option enable the feature to charge migrate hugepages to memory
 	  cgroup.
 
+config ASCEND_WATCHDOG_SYSFS_CONFIGURE
+	bool "Configure watchdog timeout and pretimeout via sysfs"
+	depends on WATCHDOG_SYSFS
+	help
+	  Add interface for user to configure timeout and pretimeout through
+	  sysfs. Enable this config carefully since a user could change the
+	  timeout value without notifying the userspace process that pings the
+	  watchdog. The kernel thread could be notified so it's ok to make that
+	  change when the watchdog is pinged by kernel thread.
+
 endif
 
 endmenu
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 10b2090f3e5e751eb7392fc39dc2e8c1eb82fa7b..6c7c5f4abeae08934c5373592552d9b4ef0ec6a8 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -485,7 +485,41 @@ static ssize_t timeout_show(struct device *dev, struct device_attribute *attr,
 
 	return sprintf(buf, "%u\n", wdd->timeout);
 }
+
+#ifdef CONFIG_ASCEND_WATCHDOG_SYSFS_CONFIGURE
+static int sysfs_write;
+module_param(sysfs_write, int, 0);
+MODULE_PARM_DESC(sysfs_write,
+		 "enable configuring timeout and pretimeout via sysfs");
+
+static ssize_t timeout_store(struct device *dev, struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	int ret;
+	unsigned int val;
+	struct watchdog_device *wdd = dev_get_drvdata(dev);
+	struct watchdog_core_data *wd_data = wdd->wd_data;
+
+	if (!sysfs_write)
+		return -EOPNOTSUPP;
+
+	ret = kstrtouint(buf, 0, &val);
+	if (ret)
+		return ret;
+
+	mutex_lock(&wd_data->lock);
+	ret = watchdog_set_timeout(wdd, val);
+	mutex_unlock(&wd_data->lock);
+
+	if (!ret)
+		ret = count;
+
+	return ret;
+}
+static DEVICE_ATTR_RW(timeout);
+#else
 static DEVICE_ATTR_RO(timeout);
+#endif
 
 static ssize_t pretimeout_show(struct device *dev,
 			       struct device_attribute *attr, char *buf)
@@ -494,7 +528,36 @@ static ssize_t pretimeout_show(struct device *dev,
 
 	return sprintf(buf, "%u\n", wdd->pretimeout);
 }
+
+#ifdef CONFIG_ASCEND_WATCHDOG_SYSFS_CONFIGURE
+static ssize_t pretimeout_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	int ret;
+	unsigned int val;
+	struct watchdog_device *wdd = dev_get_drvdata(dev);
+	struct watchdog_core_data *wd_data = wdd->wd_data;
+
+	if (!sysfs_write)
+		return -EOPNOTSUPP;
+
+	ret = kstrtouint(buf, 0, &val);
+	if (ret)
+		return ret;
+
+	mutex_lock(&wd_data->lock);
+	ret = watchdog_set_pretimeout(wdd, val);
+	mutex_unlock(&wd_data->lock);
+
+	if (!ret)
+		ret = count;
+
+	return ret;
+}
+static DEVICE_ATTR_RW(pretimeout);
+#else
 static DEVICE_ATTR_RO(pretimeout);
+#endif
 
 static ssize_t identity_show(struct device *dev, struct device_attribute *attr,
 				char *buf)