RTC: Remove UIE emulation

Since we provide UIE interrupts via a rtc_timer, the old
emulation code can be removed.

Signed-off-by: John Stultz <john.stultz@linaro.org>
LKML Reference: <1290136329-18291-5-git-send-email-john.stultz@linaro.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
CC: Alessandro Zummo <a.zummo@towertech.it>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Richard Cochran <richardcochran@gmail.com>

1 files changed, 0 insertions, 104 deletions

diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index 62227cd52410..212b16edafc0 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -46,105 +46,6 @@ static int rtc_dev_open(struct inode *inode, struct file *file)
         return err;
 }
 
-#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
-/*
- * Routine to poll RTC seconds field for change as often as possible,
- * after first RTC_UIE use timer to reduce polling
- */
-static void rtc_uie_task(struct work_struct *work)
-{
-        struct rtc_device *rtc =
-                container_of(work, struct rtc_device, uie_task);
-        struct rtc_time tm;
-        int num = 0;
-        int err;
-
-        err = rtc_read_time(rtc, &tm);
-
-        spin_lock_irq(&rtc->irq_lock);
-        if (rtc->stop_uie_polling || err) {
-                rtc->uie_task_active = 0;
-        } else if (rtc->oldsecs != tm.tm_sec) {
-                num = (tm.tm_sec + 60 - rtc->oldsecs) % 60;
-                rtc->oldsecs = tm.tm_sec;
-                rtc->uie_timer.expires = jiffies + HZ - (HZ/10);
-                rtc->uie_timer_active = 1;
-                rtc->uie_task_active = 0;
-                add_timer(&rtc->uie_timer);
-        } else if (schedule_work(&rtc->uie_task) == 0) {
-                rtc->uie_task_active = 0;
-        }
-        spin_unlock_irq(&rtc->irq_lock);
-        if (num)
-                rtc_update_irq(rtc, num, RTC_UF | RTC_IRQF);
-}
-static void rtc_uie_timer(unsigned long data)
-{
-        struct rtc_device *rtc = (struct rtc_device *)data;
-        unsigned long flags;
-
-        spin_lock_irqsave(&rtc->irq_lock, flags);
-        rtc->uie_timer_active = 0;
-        rtc->uie_task_active = 1;
-        if ((schedule_work(&rtc->uie_task) == 0))
-                rtc->uie_task_active = 0;
-        spin_unlock_irqrestore(&rtc->irq_lock, flags);
-}
-
-static int clear_uie(struct rtc_device *rtc)
-{
-        spin_lock_irq(&rtc->irq_lock);
-        if (rtc->uie_irq_active) {
-                rtc->stop_uie_polling = 1;
-                if (rtc->uie_timer_active) {
-                        spin_unlock_irq(&rtc->irq_lock);
-                        del_timer_sync(&rtc->uie_timer);
-                        spin_lock_irq(&rtc->irq_lock);
-                        rtc->uie_timer_active = 0;
-                }
-                if (rtc->uie_task_active) {
-                        spin_unlock_irq(&rtc->irq_lock);
-                        flush_scheduled_work();
-                        spin_lock_irq(&rtc->irq_lock);
-                }
-                rtc->uie_irq_active = 0;
-        }
-        spin_unlock_irq(&rtc->irq_lock);
-        return 0;
-}
-
-static int set_uie(struct rtc_device *rtc)
-{
-        struct rtc_time tm;
-        int err;
-
-        err = rtc_read_time(rtc, &tm);
-        if (err)
-                return err;
-        spin_lock_irq(&rtc->irq_lock);
-        if (!rtc->uie_irq_active) {
-                rtc->uie_irq_active = 1;
-                rtc->stop_uie_polling = 0;
-                rtc->oldsecs = tm.tm_sec;
-                rtc->uie_task_active = 1;
-                if (schedule_work(&rtc->uie_task) == 0)
-                        rtc->uie_task_active = 0;
-        }
-        rtc->irq_data = 0;
-        spin_unlock_irq(&rtc->irq_lock);
-        return 0;
-}
-
-int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc, unsigned int enabled)
-{
-        if (enabled)
-                return set_uie(rtc);
-        else
-                return clear_uie(rtc);
-}
-EXPORT_SYMBOL(rtc_dev_update_irq_enable_emul);
-
-#endif /* CONFIG_RTC_INTF_DEV_UIE_EMUL */
 
 static ssize_t
 rtc_dev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
@@ -493,11 +394,6 @@ void rtc_dev_prepare(struct rtc_device *rtc)
 
         rtc->dev.devt = MKDEV(MAJOR(rtc_devt), rtc->id);
 
-#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
-        INIT_WORK(&rtc->uie_task, rtc_uie_task);
-        setup_timer(&rtc->uie_timer, rtc_uie_timer, (unsigned long)rtc);
-#endif
-
         cdev_init(&rtc->char_dev, &rtc_dev_fops);
         rtc->char_dev.owner = rtc->owner;
 }