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>

diff --git a/drivers/ptp/ptp_ixp46x.c b/drivers/ptp/ptp_ixp46x.c
index 934c139916c609e3647acd5c6229a781ca348d56..ee4f183ef9eed337b012c4088bfeba5ae0c949a3 100644 (file)
--- 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);