Commit 6cb2e613 authored by Johannes Zink's avatar Johannes Zink Committed by Jakub Kicinski

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: default avatarJohannes Zink <j.zink@pengutronix.de>
Link: https://lore.kernel.org/r/20230719-stmmac_correct_mac_delay-v3-2-61e63427735e@pengutronix.deSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 26cfb838
...@@ -42,6 +42,7 @@ ...@@ -42,6 +42,7 @@
struct imx_dwmac_ops { struct imx_dwmac_ops {
u32 addr_width; u32 addr_width;
u32 flags;
bool mac_rgmii_txclk_auto_adj; bool mac_rgmii_txclk_auto_adj;
int (*fix_soc_reset)(void *priv, void __iomem *ioaddr); int (*fix_soc_reset)(void *priv, void __iomem *ioaddr);
...@@ -311,6 +312,9 @@ static int imx_dwmac_probe(struct platform_device *pdev) ...@@ -311,6 +312,9 @@ static int imx_dwmac_probe(struct platform_device *pdev)
goto err_parse_dt; 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->host_dma_width = dwmac->ops->addr_width;
plat_dat->init = imx_dwmac_init; plat_dat->init = imx_dwmac_init;
plat_dat->exit = imx_dwmac_exit; plat_dat->exit = imx_dwmac_exit;
...@@ -350,6 +354,7 @@ static struct imx_dwmac_ops imx8mp_dwmac_data = { ...@@ -350,6 +354,7 @@ static struct imx_dwmac_ops imx8mp_dwmac_data = {
.addr_width = 34, .addr_width = 34,
.mac_rgmii_txclk_auto_adj = false, .mac_rgmii_txclk_auto_adj = false,
.set_intf_mode = imx8mp_set_intf_mode, .set_intf_mode = imx8mp_set_intf_mode,
.flags = STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY,
}; };
static struct imx_dwmac_ops imx8dxl_dwmac_data = { static struct imx_dwmac_ops imx8dxl_dwmac_data = {
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment