diff options
| author | Johannes Zink <j.zink@pengutronix.de> | 2023-08-01 18:44:30 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-08-07 22:17:13 +0300 |
| commit | 6cb2e613c79653e40814152def7abec32efe0f29 (patch) | |
| tree | 695a07787cc1349455e1a9d5a19cc306e17223fc /drivers | |
| parent | 26cfb838aa002a5c03319f7fce87e9313e794351 (diff) | |
| download | linux-6cb2e613c79653e40814152def7abec32efe0f29.tar.xz | |
net: stmmac: dwmac-imx: enable MAC propagation delay correction for i.MX8MP
As the i.MX8MP supports reading MAC propagation delay and correcting the
Hardware timestamp counter for additional delays [1], enable the feature
for this SoC.
This reduces phase error of the PPS output from the PTP Hardware Clock
from approx 150ns to 100ns.
[1] i.MX8MP Reference Manual, rev.1 Section 11.7.2.5.3 "Timestamp
correction"
Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
Link: https://lore.kernel.org/r/20230719-stmmac_correct_mac_delay-v3-2-61e63427735e@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c index 92e06a96757a..645a9454a490 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c @@ -42,6 +42,7 @@ struct imx_dwmac_ops { u32 addr_width; + u32 flags; bool mac_rgmii_txclk_auto_adj; int (*fix_soc_reset)(void *priv, void __iomem *ioaddr); @@ -311,6 +312,9 @@ static int imx_dwmac_probe(struct platform_device *pdev) goto err_parse_dt; } + if (data->flags & STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY) + plat_dat->flags |= STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY; + plat_dat->host_dma_width = dwmac->ops->addr_width; plat_dat->init = imx_dwmac_init; plat_dat->exit = imx_dwmac_exit; @@ -350,6 +354,7 @@ static struct imx_dwmac_ops imx8mp_dwmac_data = { .addr_width = 34, .mac_rgmii_txclk_auto_adj = false, .set_intf_mode = imx8mp_set_intf_mode, + .flags = STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY, }; static struct imx_dwmac_ops imx8dxl_dwmac_data = { |