> +static int thead_dwmac_set_txclk_dir(struct plat_stmmacenet_data *plat)
> +{
> + struct thead_dwmac *dwmac = plat->bsp_priv;
> + u32 txclk_dir;
> +
> + switch (plat->mac_interface) {
> + case PHY_INTERFACE_MODE_MII:
> + txclk_dir = TXCLK_DIR_INPUT;
> + break;
> + case PHY_INTERFACE_MODE_RGMII:
> + case PHY_INTERFACE_MODE_RGMII_ID:
> + case PHY_INTERFACE_MODE_RGMII_TXID:
> + case PHY_INTERFACE_MODE_RGMII_RXID:
> + txclk_dir = TXCLK_DIR_OUTPUT;
> + break;
> + default:
> + dev_err(dwmac->dev, "unsupported phy interface %d\n",
> + plat->mac_interface);
> + return -EINVAL;
> + };
> +
> + regmap_write(dwmac->apb_regmap, GMAC_TXCLK_OEN, txclk_dir);
> +
> + return 0;
regmap_write() can fail. So it would be better to have
return regmap_write(dwmac->apb_regmap, GMAC_TXCLK_OEN, txclk_dir);
Please consider this for all functions which a similar.
> +static void thead_dwmac_fix_speed(void *priv, unsigned int speed, unsigned int mode)
> +{
> + struct thead_dwmac *dwmac = priv;
> + struct plat_stmmacenet_data *plat = dwmac->plat;
> + unsigned long rate;
> + u32 div;
Reverse christmas tree please. You will need to move the plat
assignment into the body of the code.
> +static int thead_dwmac_probe(struct platform_device *pdev)
> +{
> + struct plat_stmmacenet_data *plat;
> + struct stmmac_resources stmmac_res;
> + struct thead_dwmac *dwmac;
> + struct device_node *np = pdev->dev.of_node;
> + u32 delay_ps;
> + int ret;
> + void __iomem *apb;
np and apb should be earlier to keep with reverse christmas
tree. Please check and fix all functions.
> +
> + ret = stmmac_get_platform_resources(pdev, &stmmac_res);
> + if (ret)
> + return dev_err_probe(&pdev->dev, ret,
> + "failed to get resources\n");
> +
> + plat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
> + if (IS_ERR(plat))
> + return dev_err_probe(&pdev->dev, PTR_ERR(plat),
> + "dt configuration failed\n");
> +
> + dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
> + if (!dwmac)
> + return -ENOMEM;
> +
> + if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay_ps))
> + dwmac->rx_delay = delay_ps;
> +#define GMAC_RXCLK_DELAY_MASK GENMASK(4, 0)
So this is a 5 bit value. You should perform a range check. So, do you
need to do some sort of conversion from picoseconds to register value?
> +MODULE_AUTHOR("T-HEAD");
Authors are people.
> +MODULE_AUTHOR("Jisheng Zhang <jszhang@xxxxxxxxxx>");
> +MODULE_DESCRIPTION("T-HEAD dwmac platform driver");
> +MODULE_LICENSE("GPL");
Andrew
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pw-bot: cr
