ptp: ixp46x: use helpers for converting ns to timespec

Convert the driver to use ns_to_timespec64() and timespec64_to_ns()
instead of open coding the same logic.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 5 deletions

diff --git a/drivers/ptp/ptp_ixp46x.c b/drivers/ptp/ptp_ixp46x.c
index 934c139916c6..ee4f183ef9ee 100644
--- a/drivers/ptp/ptp_ixp46x.c
+++ b/drivers/ptp/ptp_ixp46x.c
@@ -178,7 +178,6 @@ static int ptp_ixp_adjtime(struct ptp_clock_info *ptp, s64 delta)
 static int ptp_ixp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
 {
         u64 ns;
-        u32 remainder;
         unsigned long flags;
         struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
         struct ixp46x_ts_regs *regs = ixp_clock->regs;
@@ -189,8 +188,7 @@ static int ptp_ixp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
 
         spin_unlock_irqrestore(&register_lock, flags);
 
-        ts->tv_sec = div_u64_rem(ns, 1000000000, &remainder);
-        ts->tv_nsec = remainder;
+        *ts = ns_to_timespec64(ns);
         return 0;
 }
 
@@ -202,8 +200,7 @@ static int ptp_ixp_settime(struct ptp_clock_info *ptp,
         struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
         struct ixp46x_ts_regs *regs = ixp_clock->regs;
 
-        ns = ts->tv_sec * 1000000000ULL;
-        ns += ts->tv_nsec;
+        ns = timespec64_to_ns(ts);
 
         spin_lock_irqsave(&register_lock, flags);