netdev - Re: [PATCH net-next 6/9] net: hns3: Add MDIO support to HNS3 Ethernet driver for hip08 SoC

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Date:   Sun, 11 Jun 2017 04:43:14 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Salil Mehta <salil.mehta@...wei.com>, davem@...emloft.net,
        yisen.zhuang@...wei.com, huangdaode@...ilicon.com,
        lipeng321@...wei.com, mehta.salil.lnk@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com
Subject: Re: [PATCH net-next 6/9] net: hns3: Add MDIO support to HNS3
 Ethernet driver for hip08 SoC

> > +int hclge_mac_mdio_config(struct hclge_dev *hdev)
> > +{
> > +	struct hclge_mac *mac = &hdev->hw.mac;
> > +	struct mii_bus *mdio_bus;
> > +	struct net_device *ndev = &mac->ndev;
> > +	struct phy_device *phy;
> > +	bool is_c45;
> > +	int ret;
> > +
> > +	if (hdev->hw.mac.phy_addr >= PHY_MAX_ADDR)
> > +		return 0;
> > +
> > +	if (hdev->hw.mac.phy_if == PHY_INTERFACE_MODE_NA)
> > +		return 0;
> > +	else if (mac->phy_if == PHY_INTERFACE_MODE_SGMII)
> > +		is_c45 = 0;
> > +	else if (mac->phy_if == PHY_INTERFACE_MODE_XGMII)
> > +		is_c45 = 1;
> > +	else
> > +		return -ENODATA;
> 
> Can you consider using a switch () case statement here?

Does this concept even make sense? The Marvell 10G phy will use SGMII
for 10/100/1000Mbs and swap to XGMII for 10Gbps. It however stays a
c45 device all the time.

In general, i don't think PHY mode is related to C22/C45.

   Andrew