[PATCH net-next v6 4/4] net: stmmac: dwmac-socfpga: Add support for Agilex5 TSN GMAC with FPGA converter

[Maxime Chevallier]

Hi,

On 9/8/26 09:05, muhammad.nazim.amirul.nazle.asmade at altera.com wrote:
> From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade at altera.com>
> 
> 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 with dedicated
> match .data ops that extend the standard Agilex5 setup: force GMII for
> the MAC interface selector and strip 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 <muhammad.nazim.amirul.nazle.asmade at altera.com>
> Reviewed-by: Andrew Lunn <andrew at lunn.ch>

Reviewed-by: Maxime Chevallier <maxime.chevallier at bootlin.com>

Maxime

> ---
> v6: No changes from v5.
> v5: Replace of_device_is_compatible() probe check with dedicated
>     socfpga_agilex5_tsn_gmac_ops via match .data, per Krzysztof
>     Kozlowski and Dinh Nguyen.
> v4: Add Reviewed-by from Andrew Lunn.
> 
>  .../ethernet/stmicro/stmmac/dwmac-socfpga.c   | 23 ++++++++++++++++++-
>  1 file changed, 22 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..0632105b420f 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 +651,8 @@ 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;
> +
>  	ops->setup_plat_dat(dwmac);
>  
>  	return devm_stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res);
> @@ -670,10 +673,28 @@ static const struct socfpga_dwmac_ops socfpga_agilex5_ops = {
>  	.setup_plat_dat = socfpga_agilex5_setup_plat_dat,
>  };
>  
> +static void socfpga_agilex5_tsn_gmac_setup_plat_dat(struct socfpga_dwmac *dwmac)
> +{
> +	struct plat_stmmacenet_data *plat_dat = dwmac->plat_dat;
> +
> +	socfpga_agilex5_setup_plat_dat(dwmac);
> +
> +	/* FPGA converter supplies RGMII delays; MAC uses GMII, PHY gets plain RGMII */
> +	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;
> +}
> +
> +static const struct socfpga_dwmac_ops socfpga_agilex5_tsn_gmac_ops = {
> +	.set_phy_mode = socfpga_gen10_set_phy_mode,
> +	.setup_plat_dat = socfpga_agilex5_tsn_gmac_setup_plat_dat,
> +};
> +
>  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_tsn_gmac_ops },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, socfpga_dwmac_match);