1 files changed, 9 insertions, 95 deletions

diff --git a/arch/mn10300/kernel/rtc.c b/arch/mn10300/kernel/rtc.c
index 48d7058b3295..f81f37025072 100644
--- a/arch/mn10300/kernel/rtc.c
+++ b/arch/mn10300/kernel/rtc.c
@@ -12,107 +12,19 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/mc146818rtc.h>
-#include <linux/bcd.h>
-#include <linux/timex.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+
 #include <asm/rtc-regs.h>
 #include <asm/rtc.h>
 
 DEFINE_SPINLOCK(rtc_lock);
 EXPORT_SYMBOL(rtc_lock);
 
-/*
- * Read the current RTC time
- */
-void read_persistent_clock(struct timespec *ts)
-{
-        struct rtc_time tm;
-
-        get_rtc_time(&tm);
-
-        ts->tv_nsec = 0;
-        ts->tv_sec = mktime(tm.tm_year, tm.tm_mon, tm.tm_mday,
-                            tm.tm_hour, tm.tm_min, tm.tm_sec);
-
-        /* if rtc is way off in the past, set something reasonable */
-        if (ts->tv_sec < 0)
-                ts->tv_sec = mktime(2009, 1, 1, 12, 0, 0);
-}
-
-/*
- * In order to set the CMOS clock precisely, set_rtc_mmss has to be called 500
- * ms after the second nowtime has started, because when nowtime is written
- * into the registers of the CMOS clock, it will jump to the next second
- * precisely 500 ms later.  Check the Motorola MC146818A or Dallas DS12887 data
- * sheet for details.
- *
- * BUG: This routine does not handle hour overflow properly; it just
- *      sets the minutes. Usually you'll only notice that after reboot!
- */
-static int set_rtc_mmss(unsigned long nowtime)
-{
-        unsigned char save_control, save_freq_select;
-        int retval = 0;
-        int real_seconds, real_minutes, cmos_minutes;
-
-        /* gets recalled with irq locally disabled */
-        spin_lock(&rtc_lock);
-        save_control = CMOS_READ(RTC_CONTROL); /* tell the clock it's being
-                                                * set */
-        CMOS_WRITE(save_control | RTC_SET, RTC_CONTROL);
-
-        save_freq_select = CMOS_READ(RTC_FREQ_SELECT); /* stop and reset
-                                                        * prescaler */
-        CMOS_WRITE(save_freq_select | RTC_DIV_RESET2, RTC_FREQ_SELECT);
-
-        cmos_minutes = CMOS_READ(RTC_MINUTES);
-        if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
-                cmos_minutes = bcd2bin(cmos_minutes);
-
-        /*
-         * since we're only adjusting minutes and seconds,
-         * don't interfere with hour overflow. This avoids
-         * messing with unknown time zones but requires your
-         * RTC not to be off by more than 15 minutes
-         */
-        real_seconds = nowtime % 60;
-        real_minutes = nowtime / 60;
-        if (((abs(real_minutes - cmos_minutes) + 15) / 30) & 1)
-                /* correct for half hour time zone */
-                real_minutes += 30;
-        real_minutes %= 60;
-
-        if (abs(real_minutes - cmos_minutes) < 30) {
-                if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
-                        real_seconds = bin2bcd(real_seconds);
-                        real_minutes = bin2bcd(real_minutes);
-                }
-                CMOS_WRITE(real_seconds, RTC_SECONDS);
-                CMOS_WRITE(real_minutes, RTC_MINUTES);
-        } else {
-                printk_once(KERN_NOTICE
-                       "set_rtc_mmss: can't update from %d to %d\n",
-                       cmos_minutes, real_minutes);
-                retval = -1;
-        }
-
-        /* The following flags have to be released exactly in this order,
-         * otherwise the DS12887 (popular MC146818A clone with integrated
-         * battery and quartz) will not reset the oscillator and will not
-         * update precisely 500 ms later. You won't find this mentioned in
-         * the Dallas Semiconductor data sheets, but who believes data
-         * sheets anyway ...                           -- Markus Kuhn
-         */
-        CMOS_WRITE(save_control, RTC_CONTROL);
-        CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
-        spin_unlock(&rtc_lock);
-
-        return retval;
-}
-
-int update_persistent_clock(struct timespec now)
-{
-        return set_rtc_mmss(now.tv_sec);
-}
+static const __initdata struct resource res[] = {
+        DEFINE_RES_IO(RTC_PORT(0), RTC_IO_EXTENT),
+        DEFINE_RES_IRQ(RTC_IRQ),
+};
 
 /*
  * calibrate the TSC clock against the RTC
@@ -129,4 +41,6 @@ void __init calibrate_clock(void)
         RTCRA |= RTCRA_DVR;
         RTCRA &= ~RTCRA_DVR;
         RTCRB &= ~RTCRB_SET;
+
+        platform_device_register_simple("rtc_cmos", -1, res, ARRAY_SIZE(res));
 }