rtc: Update suspend/resume timing to use 64bit time

Currently the rtc suspend/resume timing is done using
y2038 problematic timespecs. So update the code to utilize
timespec64 types.

Signed-off-by: John Stultz <john.stultz@linaro.org>

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 38e26be..472a5ad 100644 (file)
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -45,14 +45,14 @@ int rtc_hctosys_ret = -ENODEV;
  * system's wall clock; restore it on resume().
  */
 
-static struct timespec old_rtc, old_system, old_delta;
+static struct timespec64 old_rtc, old_system, old_delta;
 
 
 static int rtc_suspend(struct device *dev)
 {
        struct rtc_device       *rtc = to_rtc_device(dev);
        struct rtc_time         tm;
-       struct timespec         delta, delta_delta;
+       struct timespec64       delta, delta_delta;
        int err;
 
        if (has_persistent_clock())
@@ -68,8 +68,8 @@ static int rtc_suspend(struct device *dev)
                return 0;
        }
 
-       getnstimeofday(&old_system);
-       rtc_tm_to_time(&tm, &old_rtc.tv_sec);
+       getnstimeofday64(&old_system);
+       old_rtc.tv_sec = rtc_tm_to_time64(&tm);
 
 
        /*
@@ -78,8 +78,8 @@ static int rtc_suspend(struct device *dev)
         * try to compensate so the difference in system time
         * and rtc time stays close to constant.
         */
-       delta = timespec_sub(old_system, old_rtc);
-       delta_delta = timespec_sub(delta, old_delta);
+       delta = timespec64_sub(old_system, old_rtc);
+       delta_delta = timespec64_sub(delta, old_delta);
        if (delta_delta.tv_sec < -2 || delta_delta.tv_sec >= 2) {
                /*
                 * if delta_delta is too large, assume time correction
@@ -88,7 +88,7 @@ static int rtc_suspend(struct device *dev)
                old_delta = delta;
        } else {
                /* Otherwise try to adjust old_system to compensate */
-               old_system = timespec_sub(old_system, delta_delta);
+               old_system = timespec64_sub(old_system, delta_delta);
        }
 
        return 0;
@@ -98,8 +98,8 @@ static int rtc_resume(struct device *dev)
 {
        struct rtc_device       *rtc = to_rtc_device(dev);
        struct rtc_time         tm;
-       struct timespec         new_system, new_rtc;
-       struct timespec         sleep_time;
+       struct timespec64       new_system, new_rtc;
+       struct timespec64       sleep_time;
        int err;
 
        if (has_persistent_clock())
@@ -110,7 +110,7 @@ static int rtc_resume(struct device *dev)
                return 0;
 
        /* snapshot the current rtc and system time at resume */
-       getnstimeofday(&new_system);
+       getnstimeofday64(&new_system);
        err = rtc_read_time(rtc, &tm);
        if (err < 0) {
                pr_debug("%s:  fail to read rtc time\n", dev_name(&rtc->dev));
@@ -121,7 +121,7 @@ static int rtc_resume(struct device *dev)
                pr_debug("%s:  bogus resume time\n", dev_name(&rtc->dev));
                return 0;
        }
-       rtc_tm_to_time(&tm, &new_rtc.tv_sec);
+       new_rtc.tv_sec = rtc_tm_to_time64(&tm);
        new_rtc.tv_nsec = 0;
 
        if (new_rtc.tv_sec < old_rtc.tv_sec) {
@@ -130,7 +130,7 @@ static int rtc_resume(struct device *dev)
        }
 
        /* calculate the RTC time delta (sleep time)*/
-       sleep_time = timespec_sub(new_rtc, old_rtc);
+       sleep_time = timespec64_sub(new_rtc, old_rtc);
 
        /*
         * Since these RTC suspend/resume handlers are not called
@@ -139,11 +139,11 @@ static int rtc_resume(struct device *dev)
         * so subtract kernel run-time between rtc_suspend to rtc_resume
         * to keep things accurate.
         */
-       sleep_time = timespec_sub(sleep_time,
-                       timespec_sub(new_system, old_system));
+       sleep_time = timespec64_sub(sleep_time,
+                       timespec64_sub(new_system, old_system));
 
        if (sleep_time.tv_sec >= 0)
-               timekeeping_inject_sleeptime(&sleep_time);
+               timekeeping_inject_sleeptime64(&sleep_time);
        rtc_hctosys_ret = 0;
        return 0;
 }