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authorJacob Keller <jacob.e.keller@intel.com>2022-10-28 14:04:20 +0300
committerDavid S. Miller <davem@davemloft.net>2022-10-31 14:14:16 +0300
commit337ffae0e4d6217c92c8622d3ed26e9c8d3d5f28 (patch)
tree724a2b52f8bf15a444be453a68cba032440eda82 /drivers
parent673dd2c78817f62a9e8c79fdcb0920815b4c95c8 (diff)
downloadlinux-337ffae0e4d6217c92c8622d3ed26e9c8d3d5f28.tar.xz
ptp: xgbe: convert to .adjfine and adjust_by_scaled_ppm
The xgbe implementation of .adjfreq is implemented in terms of a straight forward "base * ppb / 1 billion" calculation. Convert this driver to .adjfine and use adjust_by_scaled_ppm to calculate the new addend value. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Acked-by: Tom Lendacky <thomas.lendacky@amd.com> Cc: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/amd/xgbe/xgbe-ptp.c20
1 files changed, 4 insertions, 16 deletions
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c b/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
index d06d260cf1e2..7051bd7cf6dc 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
@@ -134,27 +134,15 @@ static u64 xgbe_cc_read(const struct cyclecounter *cc)
return nsec;
}
-static int xgbe_adjfreq(struct ptp_clock_info *info, s32 delta)
+static int xgbe_adjfine(struct ptp_clock_info *info, long scaled_ppm)
{
struct xgbe_prv_data *pdata = container_of(info,
struct xgbe_prv_data,
ptp_clock_info);
unsigned long flags;
- u64 adjust;
- u32 addend, diff;
- unsigned int neg_adjust = 0;
+ u64 addend;
- if (delta < 0) {
- neg_adjust = 1;
- delta = -delta;
- }
-
- adjust = pdata->tstamp_addend;
- adjust *= delta;
- diff = div_u64(adjust, 1000000000UL);
-
- addend = (neg_adjust) ? pdata->tstamp_addend - diff :
- pdata->tstamp_addend + diff;
+ addend = adjust_by_scaled_ppm(pdata->tstamp_addend, scaled_ppm);
spin_lock_irqsave(&pdata->tstamp_lock, flags);
@@ -235,7 +223,7 @@ void xgbe_ptp_register(struct xgbe_prv_data *pdata)
netdev_name(pdata->netdev));
info->owner = THIS_MODULE;
info->max_adj = pdata->ptpclk_rate;
- info->adjfreq = xgbe_adjfreq;
+ info->adjfine = xgbe_adjfine;
info->adjtime = xgbe_adjtime;
info->gettime64 = xgbe_gettime;
info->settime64 = xgbe_settime;