diff options
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c index 6b639b62f778..bffa5c017032 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c @@ -191,11 +191,23 @@ static int stmmac_enable(struct ptp_clock_info *ptp, priv->systime_flags); write_unlock_irqrestore(&priv->ptp_lock, flags); break; - case PTP_CLK_REQ_EXTTS: + case PTP_CLK_REQ_EXTTS: { + u8 channel; + mutex_lock(&priv->aux_ts_lock); acr_value = readl(ptpaddr + PTP_ACR); + channel = ilog2(FIELD_GET(PTP_ACR_MASK, acr_value)); acr_value &= ~PTP_ACR_MASK; + if (on) { + if (FIELD_GET(PTP_ACR_MASK, acr_value)) { + netdev_err(priv->dev, + "Cannot enable auxiliary snapshot %d as auxiliary snapshot %d is already enabled", + rq->extts.index, channel); + mutex_unlock(&priv->aux_ts_lock); + return -EBUSY; + } + priv->plat->flags |= STMMAC_FLAG_EXT_SNAPSHOT_EN; /* Enable External snapshot trigger */ @@ -213,6 +225,7 @@ static int stmmac_enable(struct ptp_clock_info *ptp, !(acr_value & PTP_ACR_ATSFC), 10, 10000); break; + } default: break; |