Messages in this thread Patch in this message | | | From | Matt Mackall <> | Subject | [PATCH 7/14] RTC: Remove RTC UIP synchronization on MIPS Footbridge | Date | Fri, 17 Mar 2006 17:30:36 -0600 |
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Remove RTC UIP synchronization on MIPS Footbridge
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: rtc/arch/arm/mach-footbridge/time.c =================================================================== --- rtc.orig/arch/arm/mach-footbridge/time.c 2005-10-27 19:02:08.000000000 -0500 +++ rtc/arch/arm/mach-footbridge/time.c 2006-03-12 13:00:51.000000000 -0600 @@ -34,27 +34,12 @@ static int rtc_base; static unsigned long __init get_isa_cmos_time(void) { unsigned int year, mon, day, hour, min, sec; - int i; // check to see if the RTC makes sense..... if ((CMOS_READ(RTC_VALID) & RTC_VRT) == 0) return mktime(1970, 1, 1, 0, 0, 0); - /* 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 (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP) - break; - - for (i = 0 ; i < 1000000 ; i++) /* must try at least 2.228 ms */ - if (!(CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP)) - break; - - 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); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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