unicore32 time.c: change calculate method for clock_event_device

apply clockevents_calc_mult_shift() to get rid of
shift assignment and mult calculation for osmr0
  -- by advice with Thomas Gleixner

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>

1 files changed, 2 insertions, 7 deletions

diff --git a/arch/unicore32/kernel/time.c b/arch/unicore32/kernel/time.c
index 8090d763a606..8bb4b815bce9 100644
--- a/arch/unicore32/kernel/time.c
+++ b/arch/unicore32/kernel/time.c
@@ -66,11 +66,6 @@ puv3_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *c)
 static struct clock_event_device ckevt_puv3_osmr0 = {
         .name           = "osmr0",
         .features       = CLOCK_EVT_FEAT_ONESHOT,
-#ifdef CONFIG_ARCH_FPGA
-        .shift          = 18, /* correct shift val: 16, but warn_on_slowpath */
-#else
-        .shift          = 30,
-#endif
         .rating         = 200,
         .set_next_event = puv3_osmr0_set_next_event,
         .set_mode       = puv3_osmr0_set_mode,
@@ -101,8 +96,8 @@ void __init time_init(void)
         OST_OIER = 0;           /* disable any timer interrupts */
         OST_OSSR = 0;           /* clear status on all timers */
 
-        ckevt_puv3_osmr0.mult =
-                div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, ckevt_puv3_osmr0.shift);
+        clockevents_calc_mult_shift(&ckevt_puv3_osmr0, CLOCK_TICK_RATE, 5);
+
         ckevt_puv3_osmr0.max_delta_ns =
                 clockevent_delta2ns(0x7fffffff, &ckevt_puv3_osmr0);
         ckevt_puv3_osmr0.min_delta_ns =