24 	struct rtc_device *rtc = container_of(inode->i_cdev,  in rtc_dev_open()  local
27 	if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags))  in rtc_dev_open()
30 	file->private_data = rtc;  in rtc_dev_open()
32 	spin_lock_irq(&rtc->irq_lock);  in rtc_dev_open()
33 	rtc->irq_data = 0;  in rtc_dev_open()
34 	spin_unlock_irq(&rtc->irq_lock);  in rtc_dev_open()
46 	struct rtc_device *rtc =  in rtc_uie_task()  local
52 	err = rtc_read_time(rtc, &tm);  in rtc_uie_task()
54 	spin_lock_irq(&rtc->irq_lock);  in rtc_uie_task()
55 	if (rtc->stop_uie_polling || err) {  in rtc_uie_task()
56 		rtc->uie_task_active = 0;  in rtc_uie_task()
57 	} else if (rtc->oldsecs != tm.tm_sec) {  in rtc_uie_task()
58 		num = (tm.tm_sec + 60 - rtc->oldsecs) % 60;  in rtc_uie_task()
59 		rtc->oldsecs = tm.tm_sec;  in rtc_uie_task()
60 		rtc->uie_timer.expires = jiffies + HZ - (HZ / 10);  in rtc_uie_task()
61 		rtc->uie_timer_active = 1;  in rtc_uie_task()
62 		rtc->uie_task_active = 0;  in rtc_uie_task()
63 		add_timer(&rtc->uie_timer);  in rtc_uie_task()
64 	} else if (schedule_work(&rtc->uie_task) == 0) {  in rtc_uie_task()
65 		rtc->uie_task_active = 0;  in rtc_uie_task()
67 	spin_unlock_irq(&rtc->irq_lock);  in rtc_uie_task()
69 		rtc_handle_legacy_irq(rtc, num, RTC_UF);  in rtc_uie_task()
74 	struct rtc_device *rtc = from_timer(rtc, t, uie_timer);  in rtc_uie_timer()  local
77 	spin_lock_irqsave(&rtc->irq_lock, flags);  in rtc_uie_timer()
78 	rtc->uie_timer_active = 0;  in rtc_uie_timer()
79 	rtc->uie_task_active = 1;  in rtc_uie_timer()
80 	if ((schedule_work(&rtc->uie_task) == 0))  in rtc_uie_timer()
81 		rtc->uie_task_active = 0;  in rtc_uie_timer()
82 	spin_unlock_irqrestore(&rtc->irq_lock, flags);  in rtc_uie_timer()
85 static int clear_uie(struct rtc_device *rtc)  in clear_uie()  argument
87 	spin_lock_irq(&rtc->irq_lock);  in clear_uie()
88 	if (rtc->uie_irq_active) {  in clear_uie()
89 		rtc->stop_uie_polling = 1;  in clear_uie()
90 		if (rtc->uie_timer_active) {  in clear_uie()
91 			spin_unlock_irq(&rtc->irq_lock);  in clear_uie()
92 			del_timer_sync(&rtc->uie_timer);  in clear_uie()
93 			spin_lock_irq(&rtc->irq_lock);  in clear_uie()
94 			rtc->uie_timer_active = 0;  in clear_uie()
96 		if (rtc->uie_task_active) {  in clear_uie()
97 			spin_unlock_irq(&rtc->irq_lock);  in clear_uie()
99 			spin_lock_irq(&rtc->irq_lock);  in clear_uie()
101 		rtc->uie_irq_active = 0;  in clear_uie()
103 	spin_unlock_irq(&rtc->irq_lock);  in clear_uie()
107 static int set_uie(struct rtc_device *rtc)  in set_uie()  argument
112 	err = rtc_read_time(rtc, &tm);  in set_uie()
115 	spin_lock_irq(&rtc->irq_lock);  in set_uie()
116 	if (!rtc->uie_irq_active) {  in set_uie()
117 		rtc->uie_irq_active = 1;  in set_uie()
118 		rtc->stop_uie_polling = 0;  in set_uie()
119 		rtc->oldsecs = tm.tm_sec;  in set_uie()
120 		rtc->uie_task_active = 1;  in set_uie()
121 		if (schedule_work(&rtc->uie_task) == 0)  in set_uie()
122 			rtc->uie_task_active = 0;  in set_uie()
124 	rtc->irq_data = 0;  in set_uie()
125 	spin_unlock_irq(&rtc->irq_lock);  in set_uie()
129 int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc, unsigned int enabled)  in rtc_dev_update_irq_enable_emul()  argument
132 		return set_uie(rtc);  in rtc_dev_update_irq_enable_emul()
134 		return clear_uie(rtc);  in rtc_dev_update_irq_enable_emul()
143 	struct rtc_device *rtc = file->private_data;  in rtc_dev_read()  local
152 	add_wait_queue(&rtc->irq_queue, &wait);  in rtc_dev_read()
156 		spin_lock_irq(&rtc->irq_lock);  in rtc_dev_read()
157 		data = rtc->irq_data;  in rtc_dev_read()
158 		rtc->irq_data = 0;  in rtc_dev_read()
159 		spin_unlock_irq(&rtc->irq_lock);  in rtc_dev_read()
176 	remove_wait_queue(&rtc->irq_queue, &wait);  in rtc_dev_read()
192 	struct rtc_device *rtc = file->private_data;  in rtc_dev_poll()  local
195 	poll_wait(file, &rtc->irq_queue, wait);  in rtc_dev_poll()
197 	data = rtc->irq_data;  in rtc_dev_poll()
206 	struct rtc_device *rtc = file->private_data;  in rtc_dev_ioctl()  local
207 	const struct rtc_class_ops *ops = rtc->ops;  in rtc_dev_ioctl()
212 	err = mutex_lock_interruptible(&rtc->ops_lock);  in rtc_dev_ioctl()
228 		if (arg > rtc->max_user_freq && !capable(CAP_SYS_RESOURCE))  in rtc_dev_ioctl()
233 		if (rtc->irq_freq > rtc->max_user_freq &&  in rtc_dev_ioctl()
255 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
257 		err = rtc_read_alarm(rtc, &alarm);  in rtc_dev_ioctl()
266 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
293 			err = rtc_read_time(rtc, &tm);  in rtc_dev_ioctl()
315 		return rtc_set_alarm(rtc, &alarm);  in rtc_dev_ioctl()
318 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
320 		err = rtc_read_time(rtc, &tm);  in rtc_dev_ioctl()
329 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
334 		return rtc_set_time(rtc, &tm);  in rtc_dev_ioctl()
337 		err = rtc_irq_set_state(rtc, 1);  in rtc_dev_ioctl()
341 		err = rtc_irq_set_state(rtc, 0);  in rtc_dev_ioctl()
345 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
346 		return rtc_alarm_irq_enable(rtc, 1);  in rtc_dev_ioctl()
349 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
350 		return rtc_alarm_irq_enable(rtc, 0);  in rtc_dev_ioctl()
353 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
354 		return rtc_update_irq_enable(rtc, 1);  in rtc_dev_ioctl()
357 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
358 		return rtc_update_irq_enable(rtc, 0);  in rtc_dev_ioctl()
361 		err = rtc_irq_set_freq(rtc, arg);  in rtc_dev_ioctl()
365 		err = put_user(rtc->irq_freq, (unsigned long __user *)uarg);  in rtc_dev_ioctl()
369 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
373 		return rtc_set_alarm(rtc, &alarm);  in rtc_dev_ioctl()
376 		mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
377 		err = rtc_read_alarm(rtc, &alarm);  in rtc_dev_ioctl()
388 			err = ops->ioctl(rtc->dev.parent, cmd, arg);  in rtc_dev_ioctl()
398 	mutex_unlock(&rtc->ops_lock);  in rtc_dev_ioctl()
404 	struct rtc_device *rtc = file->private_data;  in rtc_dev_fasync()  local
406 	return fasync_helper(fd, file, on, &rtc->async_queue);  in rtc_dev_fasync()
411 	struct rtc_device *rtc = file->private_data;  in rtc_dev_release()  local
424 	rtc_update_irq_enable(rtc, 0);  in rtc_dev_release()
425 	rtc_irq_set_state(rtc, 0);  in rtc_dev_release()
427 	clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);  in rtc_dev_release()
444 void rtc_dev_prepare(struct rtc_device *rtc)  in rtc_dev_prepare()  argument
449 	if (rtc->id >= RTC_DEV_MAX) {  in rtc_dev_prepare()
450 		dev_dbg(&rtc->dev, "too many RTC devices\n");  in rtc_dev_prepare()
454 	rtc->dev.devt = MKDEV(MAJOR(rtc_devt), rtc->id);  in rtc_dev_prepare()
457 	INIT_WORK(&rtc->uie_task, rtc_uie_task);  in rtc_dev_prepare()
458 	timer_setup(&rtc->uie_timer, rtc_uie_timer, 0);  in rtc_dev_prepare()
461 	cdev_init(&rtc->char_dev, &rtc_dev_fops);  in rtc_dev_prepare()
462 	rtc->char_dev.owner = rtc->owner;  in rtc_dev_prepare()