netdev - RE: [PATCH net-next 1/3] net: phy: Create sysfs reciprocal links for attached

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Message-ID: <9235D6609DB808459E95D78E17F2E43D40A9DAF6@CHN-SV-EXMX02.mchp-main.com>
Date:   Sat, 27 May 2017 00:20:00 +0000
From:   <Woojung.Huh@...rochip.com>
To:     <f.fainelli@...il.com>, <netdev@...r.kernel.org>
CC:     <davem@...emloft.net>, <andrew@...n.ch>
Subject: RE: [PATCH net-next 1/3] net: phy: Create sysfs reciprocal links
 for attached_dev/phydev

> OK, I am confused now. You are describing what is going on with your
> platform right? Can you describe a bit further here what is happening
> and with which type of interface? Is this with the CPU interface or
> something?

Yes. It's on our platform.
Like your platform, fixed phy is used to connect switch CPU port/master netdev.
GMAC of SoC is cadence/macb.c with fixed phy modification.

static int macb_mii_probe(struct net_device *dev)
{
	...
	phydev = phy_find_first(bp->mii_bus);
	if (!phydev) {
		phydev = fixed_phy_register(PHY_POLL, &fphy_status, -1, NULL);
		if (IS_ERR(phydev)) {
			netdev_err(dev, "no PHY found\n");
			return -ENXIO;
		}
	}
	...
When failed to find phydev from phy_find_first(), it forces to fixed phy.
	...
	/* attach the mac to the phy */
	ret = phy_connect_direct(dev, phydev, &macb_handle_link_change,
				 bp->phy_interface);

sysfs_create_lin() inside of phy_connect_direct() fails.

What is driver you are testing? I can check the file.

Thanks.
- Woojung