32 	struct rtc_device *rtc = to_rtc_device(dev);  in rtc_device_release()  local
33 	ida_simple_remove(&rtc_ida, rtc->id);  in rtc_device_release()
34 	kfree(rtc);  in rtc_device_release()
53 	struct rtc_device	*rtc = to_rtc_device(dev);  in rtc_suspend()  local
61 	if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0)  in rtc_suspend()
65 	err = rtc_read_time(rtc, &tm);  in rtc_suspend()
67 		pr_debug("%s:  fail to read rtc time\n", dev_name(&rtc->dev));  in rtc_suspend()
99 	struct rtc_device	*rtc = to_rtc_device(dev);  in rtc_resume()  local
109 	if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0)  in rtc_resume()
114 	err = rtc_read_time(rtc, &tm);  in rtc_resume()
116 		pr_debug("%s:  fail to read rtc time\n", dev_name(&rtc->dev));  in rtc_resume()
124 		pr_debug("%s:  time travel!\n", dev_name(&rtc->dev));  in rtc_resume()
156 	struct rtc_device *rtc;  in rtc_allocate_device()  local
158 	rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);  in rtc_allocate_device()
159 	if (!rtc)  in rtc_allocate_device()
162 	device_initialize(&rtc->dev);  in rtc_allocate_device()
165 	rtc->set_offset_nsec =  NSEC_PER_SEC / 2;  in rtc_allocate_device()
167 	rtc->irq_freq = 1;  in rtc_allocate_device()
168 	rtc->max_user_freq = 64;  in rtc_allocate_device()
169 	rtc->dev.class = rtc_class;  in rtc_allocate_device()
170 	rtc->dev.groups = rtc_get_dev_attribute_groups();  in rtc_allocate_device()
171 	rtc->dev.release = rtc_device_release;  in rtc_allocate_device()
173 	mutex_init(&rtc->ops_lock);  in rtc_allocate_device()
174 	spin_lock_init(&rtc->irq_lock);  in rtc_allocate_device()
175 	init_waitqueue_head(&rtc->irq_queue);  in rtc_allocate_device()
178 	timerqueue_init_head(&rtc->timerqueue);  in rtc_allocate_device()
179 	INIT_WORK(&rtc->irqwork, rtc_timer_do_work);  in rtc_allocate_device()
181 	rtc_timer_init(&rtc->aie_timer, rtc_aie_update_irq, (void *)rtc);  in rtc_allocate_device()
183 	rtc_timer_init(&rtc->uie_rtctimer, rtc_uie_update_irq, (void *)rtc);  in rtc_allocate_device()
185 	hrtimer_init(&rtc->pie_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);  in rtc_allocate_device()
186 	rtc->pie_timer.function = rtc_pie_update_irq;  in rtc_allocate_device()
187 	rtc->pie_enabled = 0;  in rtc_allocate_device()
189 	return rtc;  in rtc_allocate_device()
213 static void rtc_device_get_offset(struct rtc_device *rtc)  in rtc_device_get_offset()  argument
224 	if (rtc->range_min == rtc->range_max)  in rtc_device_get_offset()
227 	ret = device_property_read_u32(rtc->dev.parent, "start-year",  in rtc_device_get_offset()
230 		rtc->start_secs = mktime64(start_year, 1, 1, 0, 0, 0);  in rtc_device_get_offset()
231 		rtc->set_start_time = true;  in rtc_device_get_offset()
238 	if (!rtc->set_start_time)  in rtc_device_get_offset()
241 	range_secs = rtc->range_max - rtc->range_min + 1;  in rtc_device_get_offset()
269 	if (rtc->start_secs > rtc->range_max ||  in rtc_device_get_offset()
270 	    rtc->start_secs + range_secs - 1 < rtc->range_min)  in rtc_device_get_offset()
271 		rtc->offset_secs = rtc->start_secs - rtc->range_min;  in rtc_device_get_offset()
272 	else if (rtc->start_secs > rtc->range_min)  in rtc_device_get_offset()
273 		rtc->offset_secs = range_secs;  in rtc_device_get_offset()
274 	else if (rtc->start_secs < rtc->range_min)  in rtc_device_get_offset()
275 		rtc->offset_secs = -range_secs;  in rtc_device_get_offset()
277 		rtc->offset_secs = 0;  in rtc_device_get_offset()
293 	struct rtc_device *rtc;  in rtc_device_register()  local
303 	rtc = rtc_allocate_device();  in rtc_device_register()
304 	if (!rtc) {  in rtc_device_register()
309 	rtc->id = id;  in rtc_device_register()
310 	rtc->ops = ops;  in rtc_device_register()
311 	rtc->owner = owner;  in rtc_device_register()
312 	rtc->dev.parent = dev;  in rtc_device_register()
314 	dev_set_name(&rtc->dev, "rtc%d", id);  in rtc_device_register()
316 	rtc_device_get_offset(rtc);  in rtc_device_register()
319 	err = __rtc_read_alarm(rtc, &alrm);  in rtc_device_register()
322 		rtc_initialize_alarm(rtc, &alrm);  in rtc_device_register()
324 	rtc_dev_prepare(rtc);  in rtc_device_register()
326 	err = cdev_device_add(&rtc->char_dev, &rtc->dev);  in rtc_device_register()
328 		dev_warn(&rtc->dev, "%s: failed to add char device %d:%d\n",  in rtc_device_register()
329 			 name, MAJOR(rtc->dev.devt), rtc->id);  in rtc_device_register()
332 		put_device(&rtc->dev);  in rtc_device_register()
335 		dev_dbg(&rtc->dev, "%s: dev (%d:%d)\n", name,  in rtc_device_register()
336 			MAJOR(rtc->dev.devt), rtc->id);  in rtc_device_register()
339 	rtc_proc_add_device(rtc);  in rtc_device_register()
342 			name, dev_name(&rtc->dev));  in rtc_device_register()
344 	return rtc;  in rtc_device_register()
362 void rtc_device_unregister(struct rtc_device *rtc)  in rtc_device_unregister()  argument
364 	mutex_lock(&rtc->ops_lock);  in rtc_device_unregister()
369 	rtc_proc_del_device(rtc);  in rtc_device_unregister()
370 	cdev_device_del(&rtc->char_dev, &rtc->dev);  in rtc_device_unregister()
371 	rtc->ops = NULL;  in rtc_device_unregister()
372 	mutex_unlock(&rtc->ops_lock);  in rtc_device_unregister()
373 	put_device(&rtc->dev);  in rtc_device_unregister()
379 	struct rtc_device *rtc = *(struct rtc_device **)res;  in devm_rtc_device_release()  local
381 	rtc_nvmem_unregister(rtc);  in devm_rtc_device_release()
382 	rtc_device_unregister(rtc);  in devm_rtc_device_release()
387 	struct rtc **r = res;  in devm_rtc_device_match()
411 	struct rtc_device **ptr, *rtc;  in devm_rtc_device_register()  local
417 	rtc = rtc_device_register(name, dev, ops, owner);  in devm_rtc_device_register()
418 	if (!IS_ERR(rtc)) {  in devm_rtc_device_register()
419 		*ptr = rtc;  in devm_rtc_device_register()
425 	return rtc;  in devm_rtc_device_register()
438 void devm_rtc_device_unregister(struct device *dev, struct rtc_device *rtc)  in devm_rtc_device_unregister()  argument
443 				devm_rtc_device_match, rtc);  in devm_rtc_device_unregister()
450 	struct rtc_device *rtc = *(struct rtc_device **)res;  in devm_rtc_release_device()  local
452 	rtc_nvmem_unregister(rtc);  in devm_rtc_release_device()
454 	if (rtc->registered)  in devm_rtc_release_device()
455 		rtc_device_unregister(rtc);  in devm_rtc_release_device()
457 		put_device(&rtc->dev);  in devm_rtc_release_device()
462 	struct rtc_device **ptr, *rtc;  in devm_rtc_allocate_device()  local
475 	rtc = rtc_allocate_device();  in devm_rtc_allocate_device()
476 	if (!rtc) {  in devm_rtc_allocate_device()
481 	*ptr = rtc;  in devm_rtc_allocate_device()
484 	rtc->id = id;  in devm_rtc_allocate_device()
485 	rtc->dev.parent = dev;  in devm_rtc_allocate_device()
486 	dev_set_name(&rtc->dev, "rtc%d", id);  in devm_rtc_allocate_device()
488 	return rtc;  in devm_rtc_allocate_device()
498 int __rtc_register_device(struct module *owner, struct rtc_device *rtc)  in __rtc_register_device()  argument
503 	if (!rtc->ops)  in __rtc_register_device()
506 	rtc->owner = owner;  in __rtc_register_device()
507 	rtc_device_get_offset(rtc);  in __rtc_register_device()
510 	err = __rtc_read_alarm(rtc, &alrm);  in __rtc_register_device()
512 		rtc_initialize_alarm(rtc, &alrm);  in __rtc_register_device()
514 	rtc_dev_prepare(rtc);  in __rtc_register_device()
516 	err = cdev_device_add(&rtc->char_dev, &rtc->dev);  in __rtc_register_device()
518 		dev_warn(rtc->dev.parent, "failed to add char device %d:%d\n",  in __rtc_register_device()
519 			 MAJOR(rtc->dev.devt), rtc->id);  in __rtc_register_device()
521 		dev_dbg(rtc->dev.parent, "char device (%d:%d)\n",  in __rtc_register_device()
522 			MAJOR(rtc->dev.devt), rtc->id);  in __rtc_register_device()
524 	rtc_proc_add_device(rtc);  in __rtc_register_device()
526 	rtc->registered = true;  in __rtc_register_device()
527 	dev_info(rtc->dev.parent, "registered as %s\n",  in __rtc_register_device()
528 		 dev_name(&rtc->dev));  in __rtc_register_device()