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authorDavid Brownell <david-b@pacbell.net>2006-11-25 22:09:27 +0300
committerLinus Torvalds <torvalds@woody.osdl.org>2006-11-26 00:28:33 +0300
commit2601a46474db2dcbc08ee690e56f08a10abe65cb (patch)
tree3b6ffb34023a252599b08b045db100a6ca6bfff7 /drivers/rtc
parent7531d8faa85f8880db433027bf2b04950e49baeb (diff)
downloadlinux-2601a46474db2dcbc08ee690e56f08a10abe65cb.tar.xz
[PATCH] rtc framework handles periodic irqs
The RTC framework has an irq_set_freq() method that should be used to manage the periodic IRQ frequency, but the current ioctl logic doesn't know how to do that. This patch teaches it how. This means that drivers implementing irq_set_freq() will automatically support RTC_IRQP_{READ,SET} ioctls; that logic doesn't need duplication within the driver. [akpm@osdl.org: export rtc_irq_set_freq] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/interface.c1
-rw-r--r--drivers/rtc/rtc-dev.c13
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 579cd667b16f..4783ec68fb3c 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -265,3 +265,4 @@ int rtc_irq_set_freq(struct class_device *class_dev, struct rtc_task *task, int
}
return err;
}
+EXPORT_SYMBOL_GPL(rtc_irq_set_freq);
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index 583789c66cdb..3109865e8d73 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -214,7 +214,7 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
struct rtc_wkalrm alarm;
void __user *uarg = (void __user *) arg;
- /* check that the calles has appropriate permissions
+ /* check that the calling task has appropriate permissions
* for certain ioctls. doing this check here is useful
* to avoid duplicate code in each driver.
*/
@@ -299,6 +299,17 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
err = rtc_set_time(class_dev, &tm);
break;
+
+ case RTC_IRQP_READ:
+ if (ops->irq_set_freq)
+ err = put_user(rtc->irq_freq, (unsigned long *) arg);
+ break;
+
+ case RTC_IRQP_SET:
+ if (ops->irq_set_freq)
+ err = rtc_irq_set_freq(class_dev, rtc->irq_task, arg);
+ break;
+
#if 0
case RTC_EPOCH_SET:
#ifndef rtc_epoch