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-rw-r--r--arch/arm/mach-footbridge/time.c17
1 files changed, 1 insertions, 16 deletions
diff --git a/arch/arm/mach-footbridge/time.c b/arch/arm/mach-footbridge/time.c
index 2c64a0b0502e..5d02e95dede3 100644
--- a/arch/arm/mach-footbridge/time.c
+++ b/arch/arm/mach-footbridge/time.c
@@ -34,27 +34,12 @@ static int rtc_base;
34static unsigned long __init get_isa_cmos_time(void) 34static unsigned long __init get_isa_cmos_time(void)
35{ 35{
36 unsigned int year, mon, day, hour, min, sec; 36 unsigned int year, mon, day, hour, min, sec;
37 int i;
38 37
39 // check to see if the RTC makes sense..... 38 // check to see if the RTC makes sense.....
40 if ((CMOS_READ(RTC_VALID) & RTC_VRT) == 0) 39 if ((CMOS_READ(RTC_VALID) & RTC_VRT) == 0)
41 return mktime(1970, 1, 1, 0, 0, 0); 40 return mktime(1970, 1, 1, 0, 0, 0);
42 41
43 /* The Linux interpretation of the CMOS clock register contents: 42 do {
44 * When the Update-In-Progress (UIP) flag goes from 1 to 0, the
45 * RTC registers show the second which has precisely just started.
46 * Let's hope other operating systems interpret the RTC the same way.
47 */
48 /* read RTC exactly on falling edge of update flag */
49 for (i = 0 ; i < 1000000 ; i++) /* may take up to 1 second... */
50 if (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP)
51 break;
52
53 for (i = 0 ; i < 1000000 ; i++) /* must try at least 2.228 ms */
54 if (!(CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP))
55 break;
56
57 do { /* Isn't this overkill ? UIP above should guarantee consistency */
58 sec = CMOS_READ(RTC_SECONDS); 43 sec = CMOS_READ(RTC_SECONDS);
59 min = CMOS_READ(RTC_MINUTES); 44 min = CMOS_READ(RTC_MINUTES);
60 hour = CMOS_READ(RTC_HOURS); 45 hour = CMOS_READ(RTC_HOURS);