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SubjectRe: [PATCH net-next v2 5/5] net-next: dsa: add dsa support for Mediatek MT7530 switch
Hi Sean

> + regmap = devm_regmap_init(ds->dev, NULL, priv,
> + &mt7530_regmap_config);
> + if (IS_ERR(regmap))
> + dev_warn(priv->dev, "phy regmap initialization failed");
> +

Shouldn't this be a fatal error? If you keep going when there is an
error, what happens when you actually try to use the regmap?

> + phy_mode = of_get_phy_mode(ds->ports[ds->dst->cpu_port].dn);
> + if (phy_mode < 0) {
> + dev_err(priv->dev, "Can't find phy-mode for master device\n");
> + return phy_mode;
> + }
> + dev_info(priv->dev, "phy-mode for master device = %x\n", phy_mode);

dev_dbg?

> +
> + id = mt7530_read(priv, MT7530_CREV);
> + id >>= CHIP_NAME_SHIFT;
> + if (id != MT7530_ID)
> + return -ENODEV;

It might be helpful to say what ID has been found, if it is not the
supported ID.

Andrew

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