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    Subject[PATCH 7/14] RTC: Remove RTC UIP synchronization on MIPS Footbridge
    Date
    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);
    -
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