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>

1 files changed, 11 insertions, 7 deletions

diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index 899ab8c514fa..97444b45cc26 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c
@@ -12,6 +12,9 @@
 #include <linux/module.h>
 #include <linux/rtc.h>
 
+#include "rtc-core.h"
+
+
 /* device attributes */
 
 static ssize_t rtc_sysfs_show_name(struct class_device *dev, char *buf)
@@ -25,7 +28,7 @@ static ssize_t rtc_sysfs_show_date(struct class_device *dev, char *buf)
         ssize_t retval;
         struct rtc_time tm;
 
-        retval = rtc_read_time(dev, &tm);
+        retval = rtc_read_time(to_rtc_device(dev), &tm);
         if (retval == 0) {
                 retval = sprintf(buf, "%04d-%02d-%02d\n",
                         tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
@@ -40,7 +43,7 @@ static ssize_t rtc_sysfs_show_time(struct class_device *dev, char *buf)
         ssize_t retval;
         struct rtc_time tm;
 
-        retval = rtc_read_time(dev, &tm);
+        retval = rtc_read_time(to_rtc_device(dev), &tm);
         if (retval == 0) {
                 retval = sprintf(buf, "%02d:%02d:%02d\n",
                         tm.tm_hour, tm.tm_min, tm.tm_sec);
@@ -55,7 +58,7 @@ static ssize_t rtc_sysfs_show_since_epoch(struct class_device *dev, char *buf)
         ssize_t retval;
         struct rtc_time tm;
 
-        retval = rtc_read_time(dev, &tm);
+        retval = rtc_read_time(to_rtc_device(dev), &tm);
         if (retval == 0) {
                 unsigned long time;
                 rtc_tm_to_time(&tm, &time);
@@ -94,7 +97,7 @@ rtc_sysfs_show_wakealarm(struct class_device *dev, char *buf)
          * REVISIT maybe we should require RTC implementations to
          * disable the RTC alarm after it triggers, for uniformity.
          */
-        retval = rtc_read_alarm(dev, &alm);
+        retval = rtc_read_alarm(to_rtc_device(dev), &alm);
         if (retval == 0 && alm.enabled) {
                 rtc_tm_to_time(&alm.time, &alarm);
                 retval = sprintf(buf, "%lu\n", alarm);
@@ -109,11 +112,12 @@ rtc_sysfs_set_wakealarm(struct class_device *dev, const char *buf, size_t n)
         ssize_t retval;
         unsigned long now, alarm;
         struct rtc_wkalrm alm;
+        struct rtc_device *rtc = to_rtc_device(dev);
 
         /* Only request alarms that trigger in the future.  Disable them
          * by writing another time, e.g. 0 meaning Jan 1 1970 UTC.
          */
-        retval = rtc_read_time(dev, &alm.time);
+        retval = rtc_read_time(rtc, &alm.time);
         if (retval < 0)
                 return retval;
         rtc_tm_to_time(&alm.time, &now);
@@ -124,7 +128,7 @@ rtc_sysfs_set_wakealarm(struct class_device *dev, const char *buf, size_t n)
                  * entirely prevent that here, without even the minimal
                  * locking from the /dev/rtcN api.
                  */
-                retval = rtc_read_alarm(dev, &alm);
+                retval = rtc_read_alarm(rtc, &alm);
                 if (retval < 0)
                         return retval;
                 if (alm.enabled)
@@ -141,7 +145,7 @@ rtc_sysfs_set_wakealarm(struct class_device *dev, const char *buf, size_t n)
         }
         rtc_time_to_tm(alarm, &alm.time);
 
-        retval = rtc_set_alarm(dev, &alm);
+        retval = rtc_set_alarm(rtc, &alm);
         return (retval < 0) ? retval : n;
 }
 static const CLASS_DEVICE_ATTR(wakealarm, S_IRUGO | S_IWUSR,