[PATCH] RTC subsystem: ARM cleanup

This patch removes from the ARM subsytem some of the rtc-related functions
that have been included in the RTC subsystem.  It also fixes some naming
collisions.

Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 17 insertions, 99 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index bf2e72698d02..9731b3f826ab 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -8,6 +8,7 @@ mainmenu "Linux Kernel Configuration"
 config ARM
         bool
         default y
+        select RTC_LIB
         help
           The ARM series is a line of low-power-consumption RISC chip designs
           licensed by ARM Ltd and targeted at embedded applications and
@@ -839,6 +840,8 @@ source "drivers/usb/Kconfig"
 
 source "drivers/mmc/Kconfig"
 
+source "drivers/rtc/Kconfig"
+
 endmenu
 
 source "fs/Kconfig"
diff --git a/arch/arm/common/rtctime.c b/arch/arm/common/rtctime.c
index e851d86c212c..35c9a64ac14c 100644
--- a/arch/arm/common/rtctime.c
+++ b/arch/arm/common/rtctime.c
@@ -20,6 +20,7 @@
 #include <linux/capability.h>
 #include <linux/device.h>
 #include <linux/mutex.h>
+#include <linux/rtc.h>
 
 #include <asm/rtc.h>
 #include <asm/semaphore.h>
@@ -42,89 +43,6 @@ static struct rtc_ops *rtc_ops;
 
 #define rtc_epoch 1900UL
 
-static const unsigned char days_in_month[] = {
-        31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
-};
-
-#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
-#define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year % 400))
-
-static int month_days(unsigned int month, unsigned int year)
-{
-        return days_in_month[month] + (LEAP_YEAR(year) && month == 1);
-}
-
-/*
- * Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
- */
-void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
-{
-        int days, month, year;
-
-        days = time / 86400;
-        time -= days * 86400;
-
-        tm->tm_wday = (days + 4) % 7;
-
-        year = 1970 + days / 365;
-        days -= (year - 1970) * 365
-                + LEAPS_THRU_END_OF(year - 1)
-                - LEAPS_THRU_END_OF(1970 - 1);
-        if (days < 0) {
-                year -= 1;
-                days += 365 + LEAP_YEAR(year);
-        }
-        tm->tm_year = year - 1900;
-        tm->tm_yday = days + 1;
-
-        for (month = 0; month < 11; month++) {
-                int newdays;
-
-                newdays = days - month_days(month, year);
-                if (newdays < 0)
-                        break;
-                days = newdays;
-        }
-        tm->tm_mon = month;
-        tm->tm_mday = days + 1;
-
-        tm->tm_hour = time / 3600;
-        time -= tm->tm_hour * 3600;
-        tm->tm_min = time / 60;
-        tm->tm_sec = time - tm->tm_min * 60;
-}
-EXPORT_SYMBOL(rtc_time_to_tm);
-
-/*
- * Does the rtc_time represent a valid date/time?
- */
-int rtc_valid_tm(struct rtc_time *tm)
-{
-        if (tm->tm_year < 70 ||
-            tm->tm_mon >= 12 ||
-            tm->tm_mday < 1 ||
-            tm->tm_mday > month_days(tm->tm_mon, tm->tm_year + 1900) ||
-            tm->tm_hour >= 24 ||
-            tm->tm_min >= 60 ||
-            tm->tm_sec >= 60)
-                return -EINVAL;
-
-        return 0;
-}
-EXPORT_SYMBOL(rtc_valid_tm);
-
-/*
- * Convert Gregorian date to seconds since 01-01-1970 00:00:00.
- */
-int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
-{
-        *time = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
-                       tm->tm_hour, tm->tm_min, tm->tm_sec);
-
-        return 0;
-}
-EXPORT_SYMBOL(rtc_tm_to_time);
-
 /*
  * Calculate the next alarm time given the requested alarm time mask
  * and the current time.
@@ -151,13 +69,13 @@ void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, struct rtc
         }
 }
 
-static inline int rtc_read_time(struct rtc_ops *ops, struct rtc_time *tm)
+static inline int rtc_arm_read_time(struct rtc_ops *ops, struct rtc_time *tm)
 {
         memset(tm, 0, sizeof(struct rtc_time));
         return ops->read_time(tm);
 }
 
-static inline int rtc_set_time(struct rtc_ops *ops, struct rtc_time *tm)
+static inline int rtc_arm_set_time(struct rtc_ops *ops, struct rtc_time *tm)
 {
         int ret;
 
@@ -168,7 +86,7 @@ static inline int rtc_set_time(struct rtc_ops *ops, struct rtc_time *tm)
         return ret;
 }
 
-static inline int rtc_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
+static inline int rtc_arm_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
 {
         int ret = -EINVAL;
         if (ops->read_alarm) {
@@ -178,7 +96,7 @@ static inline int rtc_read_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
         return ret;
 }
 
-static inline int rtc_set_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
+static inline int rtc_arm_set_alarm(struct rtc_ops *ops, struct rtc_wkalrm *alrm)
 {
         int ret = -EINVAL;
         if (ops->set_alarm)
@@ -266,7 +184,7 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 
         switch (cmd) {
         case RTC_ALM_READ:
-                ret = rtc_read_alarm(ops, &alrm);
+                ret = rtc_arm_read_alarm(ops, &alrm);
                 if (ret)
                         break;
                 ret = copy_to_user(uarg, &alrm.time, sizeof(tm));
@@ -288,11 +206,11 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                 alrm.time.tm_wday = -1;
                 alrm.time.tm_yday = -1;
                 alrm.time.tm_isdst = -1;
-                ret = rtc_set_alarm(ops, &alrm);
+                ret = rtc_arm_set_alarm(ops, &alrm);
                 break;
 
         case RTC_RD_TIME:
-                ret = rtc_read_time(ops, &tm);
+                ret = rtc_arm_read_time(ops, &tm);
                 if (ret)
                         break;
                 ret = copy_to_user(uarg, &tm, sizeof(tm));
@@ -310,7 +228,7 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                         ret = -EFAULT;
                         break;
                 }
-                ret = rtc_set_time(ops, &tm);
+                ret = rtc_arm_set_time(ops, &tm);
                 break;
 
         case RTC_EPOCH_SET:
@@ -341,11 +259,11 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                         ret = -EFAULT;
                         break;
                 }
-                ret = rtc_set_alarm(ops, &alrm);
+                ret = rtc_arm_set_alarm(ops, &alrm);
                 break;
 
         case RTC_WKALM_RD:
-                ret = rtc_read_alarm(ops, &alrm);
+                ret = rtc_arm_read_alarm(ops, &alrm);
                 if (ret)
                         break;
                 ret = copy_to_user(uarg, &alrm, sizeof(alrm));
@@ -435,7 +353,7 @@ static int rtc_read_proc(char *page, char **start, off_t off, int count, int *eo
         struct rtc_time tm;
         char *p = page;
 
-        if (rtc_read_time(ops, &tm) == 0) {
+        if (rtc_arm_read_time(ops, &tm) == 0) {
                 p += sprintf(p,
                         "rtc_time\t: %02d:%02d:%02d\n"
                         "rtc_date\t: %04d-%02d-%02d\n"
@@ -445,7 +363,7 @@ static int rtc_read_proc(char *page, char **start, off_t off, int count, int *eo
                         rtc_epoch);
         }
 
-        if (rtc_read_alarm(ops, &alrm) == 0) {
+        if (rtc_arm_read_alarm(ops, &alrm) == 0) {
                 p += sprintf(p, "alrm_time\t: ");
                 if ((unsigned int)alrm.time.tm_hour <= 24)
                         p += sprintf(p, "%02d:", alrm.time.tm_hour);
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index facc3f1d9e37..73d30bf01582 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -696,7 +696,7 @@ config NVRAM
 
 config RTC
         tristate "Enhanced Real Time Clock Support"
-        depends on !PPC && !PARISC && !IA64 && !M68K && (!SPARC || PCI) && !FRV
+        depends on !PPC && !PARISC && !IA64 && !M68K && (!SPARC || PCI) && !FRV && !ARM
         ---help---
           If you say Y here and create a character special file /dev/rtc with
           major number 10 and minor number 135 using mknod ("man mknod"), you
diff --git a/include/asm-arm/rtc.h b/include/asm-arm/rtc.h
index 370dfe77589d..1a5c9232a91e 100644
--- a/include/asm-arm/rtc.h
+++ b/include/asm-arm/rtc.h
@@ -25,9 +25,6 @@ struct rtc_ops {
         int             (*proc)(char *buf);
 };
 
-void rtc_time_to_tm(unsigned long, struct rtc_time *);
-int rtc_tm_to_time(struct rtc_time *, unsigned long *);
-int rtc_valid_tm(struct rtc_time *);
 void rtc_next_alarm_time(struct rtc_time *, struct rtc_time *, struct rtc_time *);
 void rtc_update(unsigned long, unsigned long);
 int register_rtc(struct rtc_ops *);