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ptp: bnxt: convert .adjfreq to .adjfine

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When the BNXT_FW_CAP_PTP_RTC flag is not set, the bnxt driver implements
.adjfreq on a cyclecounter in terms of the straightforward "base * ppb / 1
billion" calculation. When BNXT_FW_CAP_PTP_RTC is set, the driver forwards
the ppb value to firmware for configuration.

Convert the driver to the newer .adjfine interface, updating the
cyclecounter calculation to use adjust_by_scaled_ppm to perform the
calculation. Use scaled_ppm_to_ppb when forwarding the correction to
firmware.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Cc: Michael Chan <michael.chan@broadcom.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jacob Keller 2022-11-09 15:09:43 -08:00 committed by David S. Miller
parent a45392071c
commit a29c132f92
1 changed files with 6 additions and 16 deletions
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22
drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
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@ -205,7 +205,7 @@ static int bnxt_ptp_adjtime(struct ptp_clock_info *ptp_info, s64 delta)
return 0;
}
static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
static int bnxt_ptp_adjfine(struct ptp_clock_info *ptp_info, long scaled_ppm)
{
struct bnxt_ptp_cfg *ptp = container_of(ptp_info, struct bnxt_ptp_cfg,
ptp_info);
@ -214,23 +214,13 @@ static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
int rc = 0;
if (!(ptp->bp->fw_cap & BNXT_FW_CAP_PTP_RTC)) {
int neg_adj = 0;
u32 diff;
u64 adj;
if (ppb < 0) {
neg_adj = 1;
ppb = -ppb;
}
adj = ptp->cmult;
adj *= ppb;
diff = div_u64(adj, 1000000000ULL);
spin_lock_bh(&ptp->ptp_lock);
timecounter_read(&ptp->tc);
ptp->cc.mult = neg_adj ? ptp->cmult - diff : ptp->cmult + diff;
ptp->cc.mult = adjust_by_scaled_ppm(ptp->cmult, scaled_ppm);
spin_unlock_bh(&ptp->ptp_lock);
} else {
s32 ppb = scaled_ppm_to_ppb(scaled_ppm);
rc = hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG);
if (rc)
return rc;
@ -240,7 +230,7 @@ static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
rc = hwrm_req_send(ptp->bp, req);
if (rc)
netdev_err(ptp->bp->dev,
"ptp adjfreq failed. rc = %d\n", rc);
"ptp adjfine failed. rc = %d\n", rc);
}
return rc;
}
@ -769,7 +759,7 @@ static const struct ptp_clock_info bnxt_ptp_caps = {
.n_per_out = 0,
.n_pins = 0,
.pps = 0,
.adjfreq = bnxt_ptp_adjfreq,
.adjfine = bnxt_ptp_adjfine,
.adjtime = bnxt_ptp_adjtime,
.do_aux_work = bnxt_ptp_ts_aux_work,
.gettimex64 = bnxt_ptp_gettimex,