mips: remove unused function mc146818_set_rtc_mmss

I have checked carefully: this function is unused, so remove it.

The last caller appears to have been removed in 2007 in
commit 4b550488f894 ("[MIPS] Deforest the function pointer jungle in the time code.")

mc146818-time.h is included only in three files:
- arch/mips/mti-malta/malta-time.c
- arch/mips/loongson64/numa.c
- arch/mips/loongson2ef/common/time.c

Also, remove unused macros USEC_AFTER/USEC_BEFORE.

Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

diff --git a/arch/mips/include/asm/mc146818-time.h b/arch/mips/include/asm/mc146818-time.h
index cbf5cec345f1ca55effaf34b7b42a49e5873bbd7..07bf30bee792102df548ba2c8bbc629fa0a47033 100644 (file)
--- a/arch/mips/include/asm/mc146818-time.h
+++ b/arch/mips/include/asm/mc146818-time.h
@@ -12,80 +12,6 @@
 #include <linux/mc146818rtc.h>
 #include <linux/time.h>
 
-/*
- * For check timing call set_rtc_mmss() 500ms; used in timer interrupt.
- */
-#define USEC_AFTER     500000
-#define USEC_BEFORE    500000
-
-/*
- * 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 inline int mc146818_set_rtc_mmss(unsigned long nowtime)
-{
-       int real_seconds, real_minutes, cmos_minutes;
-       unsigned char save_control, save_freq_select;
-       int retval = 0;
-       unsigned long flags;
-
-       spin_lock_irqsave(&rtc_lock, flags);
-       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)
-               real_minutes += 30;             /* correct for half hour time zone */
-       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_irqrestore(&rtc_lock, flags);
-
-       return retval;
-}
-
 static inline time64_t mc146818_get_cmos_time(void)
 {
        unsigned int year, mon, day, hour, min, sec;