netdev - Re: [net-next] net: ethernet: rtsn: Add support for Renesas Ethernet-TSN

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Date: Thu, 18 Apr 2024 19:35:45 +0100
From: Simon Horman <horms@...nel.org>
To: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Subject: Re: [net-next] net: ethernet: rtsn: Add support for Renesas
 Ethernet-TSN

On Sun, Apr 14, 2024 at 03:59:37PM +0200, Niklas Söderlund wrote:
> Add initial support for Renesas Ethernet-TSN End-station device of R-Car
> V4H. The Ethernet End-station can connect to an Ethernet network using a
> 10 Mbps, 100 Mbps, or 1 Gbps full-duplex link via MII/GMII/RMII/RGMII.
> Depending on the connected PHY.
> 
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>

...

> +static int rtsn_mii_register(struct rtsn_private *priv)
> +{
> +	struct platform_device *pdev = priv->pdev;
> +	struct device *dev = &pdev->dev;
> +	struct device_node *mdio_node;
> +	struct mii_bus *mii;
> +	int ret;
> +
> +	mii = mdiobus_alloc();
> +	if (!mii)
> +		return -ENOMEM;
> +
> +	mdio_node = of_get_child_by_name(dev->of_node, "mdio");
> +	if (!mdio_node) {
> +		ret = -ENODEV;
> +		goto out_free_bus;
> +	};

nit: the ';' is not needed on the line above.

Flagged by Coccinelle.

> +
> +	mii->name = "rtsn_mii";
> +	sprintf(mii->id, "%s-%x", pdev->name, pdev->id);
> +	mii->priv = priv;
> +	mii->read = rtsn_mii_read;
> +	mii->write = rtsn_mii_write;
> +	mii->read_c45 = rtsn_mii_read_c45;
> +	mii->write_c45 = rtsn_mii_write_c45;
> +	mii->parent = dev;
> +
> +	ret = of_mdiobus_register(mii, mdio_node);
> +	of_node_put(mdio_node);
> +	if (ret)
> +		goto out_free_bus;
> +
> +	priv->mii = mii;
> +
> +	return 0;
> +
> +out_free_bus:
> +	mdiobus_free(mii);
> +	return ret;
> +}