Merge branch 'drm-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied...

[linux-drm-fsl-dcu.git] / arch / powerpc / platforms / chrp / time.c

diff --git a/arch/powerpc/platforms/chrp/time.c b/arch/powerpc/platforms/chrp/time.c
index 78df2e7ca88a1c9d5edc76e54ad7f9102420dd2e..96d1e4b3c493f8628049891f8f54d1813e8cadaa 100644 (file)
--- a/arch/powerpc/platforms/chrp/time.c
+++ b/arch/powerpc/platforms/chrp/time.c
@@ -1,6 +1,4 @@
 /*
- *  arch/ppc/platforms/chrp_time.c
- *
  *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
  *
  * Adapted for PowerPC (PReP) by Gary Thomas
@@ -41,12 +39,17 @@ long __init chrp_time_init(void)
        struct resource r;
        int base;
 
-       rtcs = find_compatible_devices("rtc", "pnpPNP,b00");
+       rtcs = of_find_compatible_node(NULL, "rtc", "pnpPNP,b00");
+       if (rtcs == NULL)
+               rtcs = of_find_compatible_node(NULL, "rtc", "ds1385-rtc");
        if (rtcs == NULL)
-               rtcs = find_compatible_devices("rtc", "ds1385-rtc");
-       if (rtcs == NULL || of_address_to_resource(rtcs, 0, &r))
                return 0;
-       
+       if (of_address_to_resource(rtcs, 0, &r)) {
+               of_node_put(rtcs);
+               return 0;
+       }
+       of_node_put(rtcs);
+
        base = r.start;
        nvram_as1 = 0;
        nvram_as0 = base;
@@ -122,33 +125,15 @@ int chrp_set_rtc_time(struct rtc_time *tmarg)
 void chrp_get_rtc_time(struct rtc_time *tm)
 {
        unsigned int year, mon, day, hour, min, sec;
-       int uip, i;
 
-       /* 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.
-        */
-
-       /* Since the UIP flag is set for about 2.2 ms and the clock
-        * is typically written with a precision of 1 jiffy, trying
-        * to obtain a precision better than a few milliseconds is
-        * an illusion. Only consistency is interesting, this also
-        * allows to use the routine for /dev/rtc without a potential
-        * 1 second kernel busy loop triggered by any reader of /dev/rtc.
-        */
-
-       for ( i = 0; i<1000000; i++) {
-               uip = chrp_cmos_clock_read(RTC_FREQ_SELECT);
+       do {
                sec = chrp_cmos_clock_read(RTC_SECONDS);
                min = chrp_cmos_clock_read(RTC_MINUTES);
                hour = chrp_cmos_clock_read(RTC_HOURS);
                day = chrp_cmos_clock_read(RTC_DAY_OF_MONTH);
                mon = chrp_cmos_clock_read(RTC_MONTH);
                year = chrp_cmos_clock_read(RTC_YEAR);
-               uip |= chrp_cmos_clock_read(RTC_FREQ_SELECT);
-               if ((uip & RTC_UIP)==0) break;
-       }
+       } while (sec != chrp_cmos_clock_read(RTC_SECONDS));
 
        if (!(chrp_cmos_clock_read(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
                BCD_TO_BIN(sec);