[PATCH net-next v3 4/4] net: stmmac: dwmac-socfpga: Add support for Agilex5 TSN GMAC with FPGA converter
From: <hidden>
Date: 2026-07-14 02:13:38
Also in:
linux-devicetree, lkml, netdev
Subsystem:
arm/socfpga dwmac glue layer, networking drivers, stmmac ethernet driver, the rest · Maintainers:
Maxime Chevallier, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Nazim Amirul <redacted> The Agilex5 SoCDK TSN Config2 board uses a GMII-to-RGMII converter implemented as FPGA soft IP between gmac1 and its PHY. This converter provides the RGMII TX/RX clock delays, so the MAC interface selector must be configured for GMII while the PHY is configured without delays. Add the "altr,socfpga-stmmac-agilex5-tsn" compatible to the match table and detect it in probe to force GMII for the MAC interface selector and strip the delay bits from phy_interface so the PHY is not configured to add delays already provided by the FPGA converter. Signed-off-by: Nazim Amirul <redacted> --- v3: No changes from v2. drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 1d7f0a57d288..bf591a68502f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c@@ -69,12 +69,13 @@ struct socfpga_dwmac { void __iomem *tse_pcs_base; void __iomem *sgmii_adapter_base; bool f2h_ptp_ref_clk; + phy_interface_t mac_interface; const struct socfpga_dwmac_ops *ops; }; static phy_interface_t socfpga_get_plat_phymode(struct socfpga_dwmac *dwmac) { - return dwmac->plat_dat->phy_interface; + return dwmac->mac_interface; } static void socfpga_sgmii_config(struct socfpga_dwmac *dwmac, bool enable)
@@ -650,6 +651,15 @@ static int socfpga_dwmac_probe(struct platform_device *pdev) plat_dat->pcs_exit = socfpga_dwmac_pcs_exit; plat_dat->select_pcs = socfpga_dwmac_select_pcs; + dwmac->mac_interface = plat_dat->phy_interface; + + if (of_device_is_compatible(pdev->dev.of_node, + "altr,socfpga-stmmac-agilex5-tsn")) { + dwmac->mac_interface = PHY_INTERFACE_MODE_GMII; + if (phy_interface_mode_is_rgmii(plat_dat->phy_interface)) + plat_dat->phy_interface = PHY_INTERFACE_MODE_RGMII; + } + ops->setup_plat_dat(dwmac); return devm_stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res);
@@ -674,6 +684,7 @@ static const struct of_device_id socfpga_dwmac_match[] = { { .compatible = "altr,socfpga-stmmac", .data = &socfpga_gen5_ops }, { .compatible = "altr,socfpga-stmmac-a10-s10", .data = &socfpga_gen10_ops }, { .compatible = "altr,socfpga-stmmac-agilex5", .data = &socfpga_agilex5_ops }, + { .compatible = "altr,socfpga-stmmac-agilex5-tsn", .data = &socfpga_agilex5_ops }, { } }; MODULE_DEVICE_TABLE(of, socfpga_dwmac_match);
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2.43.7