rtc: rtc interfaces don't use class_device
This patch removes class_device from the programming interface that the RTC
framework exposes to the rest of the kernel. Now an rtc_device is passed,
which is more type-safe and streamlines all the relevant code.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-By: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index ef40df0..d9d326f 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -13,10 +13,9 @@
#include <linux/rtc.h>
-int rtc_read_time(struct class_device *class_dev, struct rtc_time *tm)
+int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)
{
int err;
- struct rtc_device *rtc = to_rtc_device(class_dev);
err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
@@ -28,7 +27,7 @@
err = -EINVAL;
else {
memset(tm, 0, sizeof(struct rtc_time));
- err = rtc->ops->read_time(class_dev->dev, tm);
+ err = rtc->ops->read_time(rtc->class_dev.dev, tm);
}
mutex_unlock(&rtc->ops_lock);
@@ -36,10 +35,9 @@
}
EXPORT_SYMBOL_GPL(rtc_read_time);
-int rtc_set_time(struct class_device *class_dev, struct rtc_time *tm)
+int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm)
{
int err;
- struct rtc_device *rtc = to_rtc_device(class_dev);
err = rtc_valid_tm(tm);
if (err != 0)
@@ -54,17 +52,16 @@
else if (!rtc->ops->set_time)
err = -EINVAL;
else
- err = rtc->ops->set_time(class_dev->dev, tm);
+ err = rtc->ops->set_time(rtc->class_dev.dev, tm);
mutex_unlock(&rtc->ops_lock);
return err;
}
EXPORT_SYMBOL_GPL(rtc_set_time);
-int rtc_set_mmss(struct class_device *class_dev, unsigned long secs)
+int rtc_set_mmss(struct rtc_device *rtc, unsigned long secs)
{
int err;
- struct rtc_device *rtc = to_rtc_device(class_dev);
err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
@@ -73,11 +70,11 @@
if (!rtc->ops)
err = -ENODEV;
else if (rtc->ops->set_mmss)
- err = rtc->ops->set_mmss(class_dev->dev, secs);
+ err = rtc->ops->set_mmss(rtc->class_dev.dev, secs);
else if (rtc->ops->read_time && rtc->ops->set_time) {
struct rtc_time new, old;
- err = rtc->ops->read_time(class_dev->dev, &old);
+ err = rtc->ops->read_time(rtc->class_dev.dev, &old);
if (err == 0) {
rtc_time_to_tm(secs, &new);
@@ -89,7 +86,8 @@
*/
if (!((old.tm_hour == 23 && old.tm_min == 59) ||
(new.tm_hour == 23 && new.tm_min == 59)))
- err = rtc->ops->set_time(class_dev->dev, &new);
+ err = rtc->ops->set_time(rtc->class_dev.dev,
+ &new);
}
}
else
@@ -101,10 +99,9 @@
}
EXPORT_SYMBOL_GPL(rtc_set_mmss);
-int rtc_read_alarm(struct class_device *class_dev, struct rtc_wkalrm *alarm)
+int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
{
int err;
- struct rtc_device *rtc = to_rtc_device(class_dev);
err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
@@ -116,7 +113,7 @@
err = -EINVAL;
else {
memset(alarm, 0, sizeof(struct rtc_wkalrm));
- err = rtc->ops->read_alarm(class_dev->dev, alarm);
+ err = rtc->ops->read_alarm(rtc->class_dev.dev, alarm);
}
mutex_unlock(&rtc->ops_lock);
@@ -124,10 +121,9 @@
}
EXPORT_SYMBOL_GPL(rtc_read_alarm);
-int rtc_set_alarm(struct class_device *class_dev, struct rtc_wkalrm *alarm)
+int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
{
int err;
- struct rtc_device *rtc = to_rtc_device(class_dev);
err = mutex_lock_interruptible(&rtc->ops_lock);
if (err)
@@ -138,7 +134,7 @@
else if (!rtc->ops->set_alarm)
err = -EINVAL;
else
- err = rtc->ops->set_alarm(class_dev->dev, alarm);
+ err = rtc->ops->set_alarm(rtc->class_dev.dev, alarm);
mutex_unlock(&rtc->ops_lock);
return err;
@@ -147,16 +143,14 @@
/**
* rtc_update_irq - report RTC periodic, alarm, and/or update irqs
- * @class_dev: the rtc's class device
+ * @rtc: the rtc device
* @num: how many irqs are being reported (usually one)
* @events: mask of RTC_IRQF with one or more of RTC_PF, RTC_AF, RTC_UF
* Context: in_interrupt(), irqs blocked
*/
-void rtc_update_irq(struct class_device *class_dev,
+void rtc_update_irq(struct rtc_device *rtc,
unsigned long num, unsigned long events)
{
- struct rtc_device *rtc = to_rtc_device(class_dev);
-
spin_lock(&rtc->irq_lock);
rtc->irq_data = (rtc->irq_data + (num << 8)) | events;
spin_unlock(&rtc->irq_lock);
@@ -171,40 +165,43 @@
}
EXPORT_SYMBOL_GPL(rtc_update_irq);
-struct class_device *rtc_class_open(char *name)
+struct rtc_device *rtc_class_open(char *name)
{
- struct class_device *class_dev = NULL,
- *class_dev_tmp;
+ struct class_device *class_dev_tmp;
+ struct rtc_device *rtc = NULL;
down(&rtc_class->sem);
list_for_each_entry(class_dev_tmp, &rtc_class->children, node) {
if (strncmp(class_dev_tmp->class_id, name, BUS_ID_SIZE) == 0) {
- class_dev = class_device_get(class_dev_tmp);
+ class_dev_tmp = class_device_get(class_dev_tmp);
+ if (class_dev_tmp)
+ rtc = to_rtc_device(class_dev_tmp);
break;
}
}
- if (class_dev) {
- if (!try_module_get(to_rtc_device(class_dev)->owner))
- class_dev = NULL;
+ if (rtc) {
+ if (!try_module_get(rtc->owner)) {
+ class_device_put(class_dev_tmp);
+ rtc = NULL;
+ }
}
up(&rtc_class->sem);
- return class_dev;
+ return rtc;
}
EXPORT_SYMBOL_GPL(rtc_class_open);
-void rtc_class_close(struct class_device *class_dev)
+void rtc_class_close(struct rtc_device *rtc)
{
- module_put(to_rtc_device(class_dev)->owner);
- class_device_put(class_dev);
+ module_put(rtc->owner);
+ class_device_put(&rtc->class_dev);
}
EXPORT_SYMBOL_GPL(rtc_class_close);
-int rtc_irq_register(struct class_device *class_dev, struct rtc_task *task)
+int rtc_irq_register(struct rtc_device *rtc, struct rtc_task *task)
{
int retval = -EBUSY;
- struct rtc_device *rtc = to_rtc_device(class_dev);
if (task == NULL || task->func == NULL)
return -EINVAL;
@@ -220,9 +217,8 @@
}
EXPORT_SYMBOL_GPL(rtc_irq_register);
-void rtc_irq_unregister(struct class_device *class_dev, struct rtc_task *task)
+void rtc_irq_unregister(struct rtc_device *rtc, struct rtc_task *task)
{
- struct rtc_device *rtc = to_rtc_device(class_dev);
spin_lock_irq(&rtc->irq_task_lock);
if (rtc->irq_task == task)
@@ -231,11 +227,10 @@
}
EXPORT_SYMBOL_GPL(rtc_irq_unregister);
-int rtc_irq_set_state(struct class_device *class_dev, struct rtc_task *task, int enabled)
+int rtc_irq_set_state(struct rtc_device *rtc, struct rtc_task *task, int enabled)
{
int err = 0;
unsigned long flags;
- struct rtc_device *rtc = to_rtc_device(class_dev);
if (rtc->ops->irq_set_state == NULL)
return -ENXIO;
@@ -246,17 +241,16 @@
spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
if (err == 0)
- err = rtc->ops->irq_set_state(class_dev->dev, enabled);
+ err = rtc->ops->irq_set_state(rtc->class_dev.dev, enabled);
return err;
}
EXPORT_SYMBOL_GPL(rtc_irq_set_state);
-int rtc_irq_set_freq(struct class_device *class_dev, struct rtc_task *task, int freq)
+int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq)
{
int err = 0;
unsigned long flags;
- struct rtc_device *rtc = to_rtc_device(class_dev);
if (rtc->ops->irq_set_freq == NULL)
return -ENXIO;
@@ -267,7 +261,7 @@
spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
if (err == 0) {
- err = rtc->ops->irq_set_freq(class_dev->dev, freq);
+ err = rtc->ops->irq_set_freq(rtc->class_dev.dev, freq);
if (err == 0)
rtc->irq_freq = freq;
}
