diff options
| author | Jacob Keller <jacob.e.keller@intel.com> | 2022-11-09 15:09:41 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-11-11 10:58:39 +0000 |
| commit | 2d96099f50f0ee7e38789c767c93e712737520b5 (patch) | |
| tree | 15e02e85bd5384d24be7ec3063732498f26ffc85 /drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c | |
| parent | 974557020a5917f73fb7d7218402ef744b109c41 (diff) | |
ptp: stmac: convert .adjfreq to .adjfine
The stmac implementation of .adjfreq is implemented in terms of a
straight forward "base * ppb / 1 billion" calculation.
Convert this to the newer .adjfine, using the recently added
adjust_by_scaled_ppm helper function.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c index 4d11980dcd64..fc06ddeac0d5 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c @@ -15,29 +15,20 @@ * stmmac_adjust_freq * * @ptp: pointer to ptp_clock_info structure - * @ppb: desired period change in parts ber billion + * @scaled_ppm: desired period change in scaled parts per million * * Description: this function will adjust the frequency of hardware clock. + * + * Scaled parts per million is ppm with a 16-bit binary fractional field. */ -static int stmmac_adjust_freq(struct ptp_clock_info *ptp, s32 ppb) +static int stmmac_adjust_freq(struct ptp_clock_info *ptp, long scaled_ppm) { struct stmmac_priv *priv = container_of(ptp, struct stmmac_priv, ptp_clock_ops); unsigned long flags; - u32 diff, addend; - int neg_adj = 0; - u64 adj; - - if (ppb < 0) { - neg_adj = 1; - ppb = -ppb; - } + u32 addend; - addend = priv->default_addend; - adj = addend; - adj *= ppb; - diff = div_u64(adj, 1000000000ULL); - addend = neg_adj ? (addend - diff) : (addend + diff); + addend = adjust_by_scaled_ppm(priv->default_addend, scaled_ppm); write_lock_irqsave(&priv->ptp_lock, flags); stmmac_config_addend(priv, priv->ptpaddr, addend); @@ -269,7 +260,7 @@ static struct ptp_clock_info stmmac_ptp_clock_ops = { .n_per_out = 0, /* will be overwritten in stmmac_ptp_register */ .n_pins = 0, .pps = 0, - .adjfreq = stmmac_adjust_freq, + .adjfine = stmmac_adjust_freq, .adjtime = stmmac_adjust_time, .gettime64 = stmmac_get_time, .settime64 = stmmac_set_time, |