diff options
Diffstat (limited to 'drivers/rtc/interface.c')
| -rw-r--r-- | drivers/rtc/interface.c | 22 |
1 files changed, 6 insertions, 16 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 56e490709b87..579cd667b16f 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -229,6 +229,9 @@ int rtc_irq_set_state(struct class_device *class_dev, struct rtc_task *task, int unsigned long flags; struct rtc_device *rtc = to_rtc_device(class_dev); + if (rtc->ops->irq_set_state == NULL) + return -ENXIO; + spin_lock_irqsave(&rtc->irq_task_lock, flags); if (rtc->irq_task != task) err = -ENXIO; @@ -243,25 +246,12 @@ EXPORT_SYMBOL_GPL(rtc_irq_set_state); int rtc_irq_set_freq(struct class_device *class_dev, struct rtc_task *task, int freq) { - int err = 0, tmp = 0; + int err = 0; unsigned long flags; struct rtc_device *rtc = to_rtc_device(class_dev); - /* allowed range is 2-8192 */ - if (freq < 2 || freq > 8192) - return -EINVAL; -/* - FIXME: this does not belong here, will move where appropriate - at a later stage. It cannot hurt right now, trust me :) - if ((freq > rtc_max_user_freq) && (!capable(CAP_SYS_RESOURCE))) - return -EACCES; -*/ - /* check if freq is a power of 2 */ - while (freq > (1 << tmp)) - tmp++; - - if (freq != (1 << tmp)) - return -EINVAL; + if (rtc->ops->irq_set_freq == NULL) + return -ENXIO; spin_lock_irqsave(&rtc->irq_task_lock, flags); if (rtc->irq_task != task) |