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author | Paul Mackerras <paulus@samba.org> | 2006-03-29 13:24:50 +1100 |
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committer | Paul Mackerras <paulus@samba.org> | 2006-03-29 13:24:50 +1100 |
commit | bac30d1a78d0f11c613968fc8b351a91ed465386 (patch) | |
tree | e52f3c876522a2f6047a6ec1c27df2e8a79486b8 /include/asm-mips/mc146818-time.h | |
parent | e8222502ee6157e2713da9e0792c21f4ad458d50 (diff) | |
parent | ca9ba4471c1203bb6e759b76e83167fec54fe590 (diff) | |
download | op-kernel-dev-bac30d1a78d0f11c613968fc8b351a91ed465386.zip op-kernel-dev-bac30d1a78d0f11c613968fc8b351a91ed465386.tar.gz |
Merge ../linux-2.6
Diffstat (limited to 'include/asm-mips/mc146818-time.h')
-rw-r--r-- | include/asm-mips/mc146818-time.h | 33 |
1 files changed, 2 insertions, 31 deletions
diff --git a/include/asm-mips/mc146818-time.h b/include/asm-mips/mc146818-time.h index 4721486..41ac8d3 100644 --- a/include/asm-mips/mc146818-time.h +++ b/include/asm-mips/mc146818-time.h @@ -86,43 +86,14 @@ static inline int mc146818_set_rtc_mmss(unsigned long nowtime) return retval; } -/* - * Returns true if a clock update is in progress - */ -static inline unsigned char rtc_is_updating(void) -{ - unsigned char uip; - unsigned long flags; - - spin_lock_irqsave(&rtc_lock, flags); - uip = (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP); - spin_unlock_irqrestore(&rtc_lock, flags); - return uip; -} - static inline unsigned long mc146818_get_cmos_time(void) { unsigned int year, mon, day, hour, min, sec; - int i; unsigned long flags; - /* - * 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. - */ - - /* read RTC exactly on falling edge of update flag */ - for (i = 0 ; i < 1000000 ; i++) /* may take up to 1 second... */ - if (rtc_is_updating()) - break; - for (i = 0 ; i < 1000000 ; i++) /* must try at least 2.228 ms */ - if (!rtc_is_updating()) - break; - spin_lock_irqsave(&rtc_lock, flags); - do { /* Isn't this overkill ? UIP above should guarantee consistency */ + + do { sec = CMOS_READ(RTC_SECONDS); min = CMOS_READ(RTC_MINUTES); hour = CMOS_READ(RTC_HOURS); |