67 static void watchdog_deferred_registration_add(struct watchdog_device *wdd)  in watchdog_deferred_registration_add()  argument
69 	list_add_tail(&wdd->deferred,  in watchdog_deferred_registration_add()
73 static void watchdog_deferred_registration_del(struct watchdog_device *wdd)  in watchdog_deferred_registration_del()  argument
81 		if (wdd_tmp == wdd) {  in watchdog_deferred_registration_del()
88 static void watchdog_check_min_max_timeout(struct watchdog_device *wdd)  in watchdog_check_min_max_timeout()  argument
94 	if (!wdd->max_hw_heartbeat_ms && wdd->min_timeout > wdd->max_timeout) {  in watchdog_check_min_max_timeout()
96 		wdd->min_timeout = 0;  in watchdog_check_min_max_timeout()
97 		wdd->max_timeout = 0;  in watchdog_check_min_max_timeout()
103  * @wdd: watchdog device
118 int watchdog_init_timeout(struct watchdog_device *wdd,  in watchdog_init_timeout()  argument
121 	const char *dev_str = wdd->parent ? dev_name(wdd->parent) :  in watchdog_init_timeout()
122 			      (const char *)wdd->info->identity;  in watchdog_init_timeout()
126 	watchdog_check_min_max_timeout(wdd);  in watchdog_init_timeout()
130 		if (!watchdog_timeout_invalid(wdd, timeout_parm)) {  in watchdog_init_timeout()
131 			wdd->timeout = timeout_parm;  in watchdog_init_timeout()
142 		if (t && !watchdog_timeout_invalid(wdd, t)) {  in watchdog_init_timeout()
143 			wdd->timeout = t;  in watchdog_init_timeout()
150 	if (ret < 0 && wdd->timeout)  in watchdog_init_timeout()
152 			wdd->timeout);  in watchdog_init_timeout()
161 	struct watchdog_device *wdd;  in watchdog_reboot_notifier()  local
163 	wdd = container_of(nb, struct watchdog_device, reboot_nb);  in watchdog_reboot_notifier()
165 		if (watchdog_hw_running(wdd)) {  in watchdog_reboot_notifier()
168 			ret = wdd->ops->stop(wdd);  in watchdog_reboot_notifier()
169 			trace_watchdog_stop(wdd, ret);  in watchdog_reboot_notifier()
181 	struct watchdog_device *wdd = container_of(nb, struct watchdog_device,  in watchdog_restart_notifier()  local
186 	ret = wdd->ops->restart(wdd, action, data);  in watchdog_restart_notifier()
196 	struct watchdog_device *wdd;  in watchdog_pm_notifier()  local
199 	wdd = container_of(nb, struct watchdog_device, pm_nb);  in watchdog_pm_notifier()
205 		ret = watchdog_dev_suspend(wdd);  in watchdog_pm_notifier()
210 		ret = watchdog_dev_resume(wdd);  in watchdog_pm_notifier()
222  * @wdd: watchdog device
230  * If a wdd->ops->restart function is provided when watchdog_register_device is
234 void watchdog_set_restart_priority(struct watchdog_device *wdd, int priority)  in watchdog_set_restart_priority()  argument
236 	wdd->restart_nb.priority = priority;  in watchdog_set_restart_priority()
240 static int ___watchdog_register_device(struct watchdog_device *wdd)  in ___watchdog_register_device()  argument
244 	if (wdd == NULL || wdd->info == NULL || wdd->ops == NULL)  in ___watchdog_register_device()
248 	if (!wdd->ops->start || (!wdd->ops->stop && !wdd->max_hw_heartbeat_ms))  in ___watchdog_register_device()
251 	watchdog_check_min_max_timeout(wdd);  in ___watchdog_register_device()
260 	if (wdd->parent) {  in ___watchdog_register_device()
261 		ret = of_alias_get_id(wdd->parent->of_node, "watchdog");  in ___watchdog_register_device()
272 	wdd->id = id;  in ___watchdog_register_device()
274 	ret = watchdog_dev_register(wdd);  in ___watchdog_register_device()
285 		wdd->id = id;  in ___watchdog_register_device()
287 		ret = watchdog_dev_register(wdd);  in ___watchdog_register_device()
297 			set_bit(WDOG_STOP_ON_REBOOT, &wdd->status);  in ___watchdog_register_device()
299 			clear_bit(WDOG_STOP_ON_REBOOT, &wdd->status);  in ___watchdog_register_device()
302 	if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status)) {  in ___watchdog_register_device()
303 		if (!wdd->ops->stop)  in ___watchdog_register_device()
304 			pr_warn("watchdog%d: stop_on_reboot not supported\n", wdd->id);  in ___watchdog_register_device()
306 			wdd->reboot_nb.notifier_call = watchdog_reboot_notifier;  in ___watchdog_register_device()
308 			ret = register_reboot_notifier(&wdd->reboot_nb);  in ___watchdog_register_device()
311 					wdd->id, ret);  in ___watchdog_register_device()
312 				watchdog_dev_unregister(wdd);  in ___watchdog_register_device()
319 	if (wdd->ops->restart) {  in ___watchdog_register_device()
320 		wdd->restart_nb.notifier_call = watchdog_restart_notifier;  in ___watchdog_register_device()
322 		ret = register_restart_handler(&wdd->restart_nb);  in ___watchdog_register_device()
325 				wdd->id, ret);  in ___watchdog_register_device()
328 	if (test_bit(WDOG_NO_PING_ON_SUSPEND, &wdd->status)) {  in ___watchdog_register_device()
329 		wdd->pm_nb.notifier_call = watchdog_pm_notifier;  in ___watchdog_register_device()
331 		ret = register_pm_notifier(&wdd->pm_nb);  in ___watchdog_register_device()
334 				wdd->id, ret);  in ___watchdog_register_device()
340 static int __watchdog_register_device(struct watchdog_device *wdd)  in __watchdog_register_device()  argument
345 	ret = ___watchdog_register_device(wdd);  in __watchdog_register_device()
347 		dev_str = wdd->parent ? dev_name(wdd->parent) :  in __watchdog_register_device()
348 			  (const char *)wdd->info->identity;  in __watchdog_register_device()
358  * @wdd: watchdog device
367 int watchdog_register_device(struct watchdog_device *wdd)  in watchdog_register_device()  argument
373 		ret = __watchdog_register_device(wdd);  in watchdog_register_device()
375 		watchdog_deferred_registration_add(wdd);  in watchdog_register_device()
382 static void __watchdog_unregister_device(struct watchdog_device *wdd)  in __watchdog_unregister_device()  argument
384 	if (wdd == NULL)  in __watchdog_unregister_device()
387 	if (wdd->ops->restart)  in __watchdog_unregister_device()
388 		unregister_restart_handler(&wdd->restart_nb);  in __watchdog_unregister_device()
390 	if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status))  in __watchdog_unregister_device()
391 		unregister_reboot_notifier(&wdd->reboot_nb);  in __watchdog_unregister_device()
393 	watchdog_dev_unregister(wdd);  in __watchdog_unregister_device()
394 	ida_free(&watchdog_ida, wdd->id);  in __watchdog_unregister_device()
399  * @wdd: watchdog device to unregister
405 void watchdog_unregister_device(struct watchdog_device *wdd)  in watchdog_unregister_device()  argument
409 		__watchdog_unregister_device(wdd);  in watchdog_unregister_device()
411 		watchdog_deferred_registration_del(wdd);  in watchdog_unregister_device()
425  * @wdd: watchdog device
432 				struct watchdog_device *wdd)  in devm_watchdog_register_device()  argument
442 	ret = watchdog_register_device(wdd);  in devm_watchdog_register_device()
444 		*rcwdd = wdd;  in devm_watchdog_register_device()
459 		struct watchdog_device *wdd;  in watchdog_deferred_registration()  local
461 		wdd = list_first_entry(&wtd_deferred_reg_list,  in watchdog_deferred_registration()
463 		list_del(&wdd->deferred);  in watchdog_deferred_registration()
464 		__watchdog_register_device(wdd);  in watchdog_deferred_registration()