[PATCH net-next 3/3] net: stmmac: Add UltraRISC DP1000 GMAC support

[Andrew Lunn]

> --- /dev/null
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-ultrarisc.c
> @@ -0,0 +1,54 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * UltraRISC DWMAC platform driver
> + *
> + * Copyright (C) 2026 UltraRISC Technology (Shanghai) Co., Ltd.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/phy.h>
> +#include <linux/platform_device.h>
> +
> +#include "stmmac_platform.h"
> +
> +static int ultrarisc_dwmac_probe(struct platform_device *pdev)
> +{
> +	struct plat_stmmacenet_data *plat_dat;
> +	struct stmmac_resources stmmac_res;
> +	struct device *dev = &pdev->dev;
> +	int ret;
> +
> +	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
> +	if (ret)
> +		return dev_err_probe(dev, ret, "failed to get resources\n");
> +
> +	plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
> +	if (IS_ERR(plat_dat))
> +		return dev_err_probe(dev, PTR_ERR(plat_dat), "failed to parse DT parameters\n");
> +
> +	plat_dat->phy_interface =
> +		phy_fix_phy_mode_for_mac_delays(plat_dat->phy_interface, true, true);
> +	if (plat_dat->phy_interface == PHY_INTERFACE_MODE_NA)
> +		return dev_err_probe(dev, -EINVAL, "unsupported phy interface mode\n");
> +
> +	return devm_stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res);
> +}
> +
> +static const struct of_device_id ultrarisc_dwmac_match[] = {
> +	{ .compatible = "ultrarisc,dp1000-gmac" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, ultrarisc_dwmac_match);
> +
> +static struct platform_driver ultrarisc_dwmac_driver = {
> +	.probe = ultrarisc_dwmac_probe,
> +	.driver = {
> +		.name = "ultrarisc-dwmac",
> +		.pm = &stmmac_pltfr_pm_ops,
> +		.of_match_table = ultrarisc_dwmac_match,
> +	},
> +};
> +module_platform_driver(ultrarisc_dwmac_driver);
> +
> +MODULE_DESCRIPTION("UltraRISC DWMAC platform driver");
> +MODULE_LICENSE("GPL");

This looks to be 90% identical to dwmac-sophgo.c.

Do you expect any further changes to this driver? Is everything
supported? Are there more clocks? A GPIO for WoL?

I'm just wondering if the common code should be pulled out, or even
dwmac-sophgo.c made generic so it can handle all plain boring devices
which have RGMII delays and not a lot else.

      Andrew