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authorMatt Mackall <mpm@selenic.com>2006-03-28 01:56:05 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-28 09:16:00 -0800
commit4af6ec46c696a57ba9b1c1abffcdca14d6ab5410 (patch)
tree5b111e21a95b4fa2434f811ea64ed4e63259b953 /arch
parent6f0d7bd6a14dcf5b258cfd809143c50e4897902b (diff)
downloadop-kernel-dev-4af6ec46c696a57ba9b1c1abffcdca14d6ab5410.zip
op-kernel-dev-4af6ec46c696a57ba9b1c1abffcdca14d6ab5410.tar.gz
[PATCH] RTC: Remove RTC UIP synchronization on ARM
Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-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 2c64a0b..5d02e95 100644
--- a/arch/arm/mach-footbridge/time.c
+++ b/arch/arm/mach-footbridge/time.c
@@ -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);
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