diff options
| author | Paul Mackerras <paulus@samba.org> | 2006-03-29 13:24:50 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-03-29 13:24:50 +1100 |
| commit | bac30d1a78d0f11c613968fc8b351a91ed465386 (patch) | |
| tree | e52f3c876522a2f6047a6ec1c27df2e8a79486b8 /arch/powerpc/platforms/maple | |
| parent | e8222502ee6157e2713da9e0792c21f4ad458d50 (diff) | |
| parent | ca9ba4471c1203bb6e759b76e83167fec54fe590 (diff) | |
Merge ../linux-2.6
Diffstat (limited to 'arch/powerpc/platforms/maple')
| -rw-r--r-- | arch/powerpc/platforms/maple/time.c | 24 |
1 files changed, 2 insertions, 22 deletions
diff --git a/arch/powerpc/platforms/maple/time.c b/arch/powerpc/platforms/maple/time.c index 5e6981d1737..b9a2b3d4bf3 100644 --- a/arch/powerpc/platforms/maple/time.c +++ b/arch/powerpc/platforms/maple/time.c @@ -60,34 +60,14 @@ static void maple_clock_write(unsigned long val, int addr) void maple_get_rtc_time(struct rtc_time *tm) { - int uip, i; - - /* The Linux interpretation of the CMOS clock register contents: - * When the Update-In-Progress (UIP) flag goes from 1 to 0, the - * RTC registers show the second which has precisely just started. - * Let's hope other operating systems interpret the RTC the same way. - */ - - /* Since the UIP flag is set for about 2.2 ms and the clock - * is typically written with a precision of 1 jiffy, trying - * to obtain a precision better than a few milliseconds is - * an illusion. Only consistency is interesting, this also - * allows to use the routine for /dev/rtc without a potential - * 1 second kernel busy loop triggered by any reader of /dev/rtc. - */ - - for (i = 0; i<1000000; i++) { - uip = maple_clock_read(RTC_FREQ_SELECT); + do { tm->tm_sec = maple_clock_read(RTC_SECONDS); tm->tm_min = maple_clock_read(RTC_MINUTES); tm->tm_hour = maple_clock_read(RTC_HOURS); tm->tm_mday = maple_clock_read(RTC_DAY_OF_MONTH); tm->tm_mon = maple_clock_read(RTC_MONTH); tm->tm_year = maple_clock_read(RTC_YEAR); - uip |= maple_clock_read(RTC_FREQ_SELECT); - if ((uip & RTC_UIP)==0) - break; - } + } while (tm->tm_sec != maple_clock_read(RTC_SECONDS)); if (!(maple_clock_read(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { |