diff options
| author | Noor Azura Ahmad Tarmizi <noor.azura.ahmad.tarmizi@intel.com> | 2023-01-11 13:02:00 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-01-11 21:10:06 -0800 |
| commit | ae9dcb91c6069e20b3b9505d79cbc89fd6e086f5 (patch) | |
| tree | 7b77b76fca32d0cae2a8cc4e2f0df308ae517ab1 /drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c | |
| parent | eb25df88287b37a63b9fb9ca6d333af2f504407a (diff) | |
net: stmmac: add aux timestamps fifo clearance wait
Add timeout polling wait for auxiliary timestamps snapshot FIFO clear bit
(ATSFC) to clear. This is to ensure no residue fifo value is being read
erroneously.
Fixes: f4da56529da6 ("net: stmmac: Add support for external trigger timestamping")
Cc: <stable@vger.kernel.org> # 5.10.x
Signed-off-by: Noor Azura Ahmad Tarmizi <noor.azura.ahmad.tarmizi@intel.com>
Link: https://lore.kernel.org/r/20230111050200.2130-1-noor.azura.ahmad.tarmizi@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c index fc06ddeac0d5..b4388ca8d211 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c @@ -210,7 +210,10 @@ static int stmmac_enable(struct ptp_clock_info *ptp, } writel(acr_value, ptpaddr + PTP_ACR); mutex_unlock(&priv->aux_ts_lock); - ret = 0; + /* wait for auxts fifo clear to finish */ + ret = readl_poll_timeout(ptpaddr + PTP_ACR, acr_value, + !(acr_value & PTP_ACR_ATSFC), + 10, 10000); break; default: |