[PATCH v2 4/4] net: stmmac: Add glue layer for Sophgo SG2044 SoC

[Alexander Lobakin]

From: Inochi Amaoto <inochiama at gmail.com>
Date: Fri, 25 Oct 2024 09:10:00 +0800

> Adds Sophgo dwmac driver support on the Sophgo SG2044 SoC.
> 
> Signed-off-by: Inochi Amaoto <inochiama at gmail.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/Kconfig   |  11 ++
>  drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
>  .../ethernet/stmicro/stmmac/dwmac-sophgo.c    | 109 ++++++++++++++++++
>  3 files changed, 121 insertions(+)
>  create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c

[...]

> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c
> new file mode 100644
> index 000000000000..8f37bcf86a73
> --- /dev/null
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c
> @@ -0,0 +1,109 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Sophgo DWMAC platform driver
> + *
> + * Copyright (C) 2024 Inochi Amaoto <inochiama at gmail.com>
> + *

This empty line is redundant I guess?

> + */
> +
> +#include <linux/bits.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/platform_device.h>
> +#include <linux/property.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/phy.h>
> +#include <linux/regmap.h>

Here should be alphabetical order.

> +
> +#include "stmmac_platform.h"
> +
> +struct sophgo_dwmac {
> +	struct device *dev;
> +	struct clk *clk_tx;
> +};
> +
> +static void sophgo_dwmac_fix_mac_speed(void *priv, unsigned int speed, unsigned int mode)
> +{
> +	struct sophgo_dwmac *dwmac = priv;
> +	long rate;
> +	int ret;
> +
> +	rate = rgmii_clock(speed);
> +	if (ret < 0) {

Did you mean `if (rate < 0)`?

> +		dev_err(dwmac->dev, "invalid speed %u\n", speed);
> +		return;
> +	}
> +
> +	ret = clk_set_rate(dwmac->clk_tx, rate);
> +	if (ret)
> +		dev_err(dwmac->dev, "failed to set tx rate %lu\n", rate);

Don't you want to print the error code here?

		"failed to set tx rate %lu: %pe\n", rate, ERR_PTR(ret));

> +}
> +
> +static int sophgo_sg2044_dwmac_init(struct platform_device *pdev,
> +				    struct plat_stmmacenet_data *plat_dat,
> +				    struct stmmac_resources *stmmac_res)
> +{
> +	struct sophgo_dwmac *dwmac;
> +	int ret;

Unused var.

> +
> +	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
> +	if (!dwmac)
> +		return -ENOMEM;
> +
> +	dwmac->clk_tx = devm_clk_get_enabled(&pdev->dev, "tx");
> +	if (IS_ERR(dwmac->clk_tx))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->clk_tx),
> +				     "failed to get tx clock\n");
> +
> +	dwmac->dev = &pdev->dev;
> +	plat_dat->bsp_priv = dwmac;
> +	plat_dat->flags |= STMMAC_FLAG_SPH_DISABLE;
> +	plat_dat->fix_mac_speed = sophgo_dwmac_fix_mac_speed;
> +	plat_dat->multicast_filter_bins = 0;
> +	plat_dat->unicast_filter_entries = 1;
> +
> +	return 0;
> +}

[...]

+ see the build bot report.

Thanks,
Olek