diff options
| author | Tan Tee Min <tee.min.tan@intel.com> | 2021-04-14 03:16:17 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-04-14 22:57:45 +0300 |
| commit | f4da56529da602010979e8497d1f02eaf5df8883 (patch) | |
| tree | d052a0738def1cd83b584580ed7b030a29da0869 /drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c | |
| parent | 945c6ff851d8cc41571a8bb5735fb40a925a7aa2 (diff) | |
| download | linux-f4da56529da602010979e8497d1f02eaf5df8883.tar.xz | |
net: stmmac: Add support for external trigger timestamping
The Synopsis MAC controller supports auxiliary snapshot feature that
allows user to store a snapshot of the system time based on an external
event.
This patch add supports to the above mentioned feature. Users will be
able to triggered capturing the time snapshot from user-space using
application such as testptp or any other applications that uses the
PTP_EXTTS_REQUEST ioctl request.
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Tan Tee Min <tee.min.tan@intel.com>
Co-developed-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c index 60566598d644..ec140fc4a0f5 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c @@ -296,6 +296,13 @@ static int intel_crosststamp(ktime_t *device, intel_priv = priv->plat->bsp_priv; + /* Both internal crosstimestamping and external triggered event + * timestamping cannot be run concurrently. + */ + if (priv->plat->ext_snapshot_en) + return -EBUSY; + + mutex_lock(&priv->aux_ts_lock); /* Enable Internal snapshot trigger */ acr_value = readl(ptpaddr + PTP_ACR); acr_value &= ~PTP_ACR_MASK; @@ -321,6 +328,8 @@ static int intel_crosststamp(ktime_t *device, acr_value = readl(ptpaddr + PTP_ACR); acr_value |= PTP_ACR_ATSFC; writel(acr_value, ptpaddr + PTP_ACR); + /* Release the mutex */ + mutex_unlock(&priv->aux_ts_lock); /* Trigger Internal snapshot signal * Create a rising edge by just toggle the GPO1 to low @@ -520,6 +529,7 @@ static int intel_mgbe_common_data(struct pci_dev *pdev, plat->mdio_bus_data->phy_mask |= 1 << INTEL_MGBE_XPCS_ADDR; plat->int_snapshot_num = AUX_SNAPSHOT1; + plat->ext_snapshot_num = AUX_SNAPSHOT0; plat->has_crossts = true; plat->crosststamp = intel_crosststamp; |