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net: sysfs: Document PHY device sysfs attributes

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Document the different sysfs attributes that exist for PHY devices:
attached_dev, phy_has_fixups, phy_id and phy_interface.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Florian Fainelli 2017-05-25 09:21:43 -07:00 committed by David S. Miller
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What: /sys/class/mdio_bus/<bus>/<device>/attached_dev
Date: May 2017
KernelVersion: 4.13
Contact: netdev@vger.kernel.org
Description:
Symbolic link to the network device this PHY device is
attached to.
What: /sys/class/mdio_bus/<bus>/<device>/phy_has_fixups
Date: February 2014
KernelVersion: 3.15
Contact: netdev@vger.kernel.org
Description:
Boolean value indicating whether the PHY device has
any fixups registered against it (phy_register_fixup)
What: /sys/class/mdio_bus/<bus>/<device>/phy_id
Date: November 2012
KernelVersion: 3.8
Contact: netdev@vger.kernel.org
Description:
32-bit hexadecimal value corresponding to the PHY device's OUI,
model and revision number.
What: /sys/class/mdio_bus/<bus>/<device>/phy_interface
Date: February 2014
KernelVersion: 3.15
Contact: netdev@vger.kernel.org
Description:
String value indicating the PHY interface, possible
values are:.
<empty> (not available), mii, gmii, sgmii, tbi, rev-mii,
rmii, rgmii, rgmii-id, rgmii-rxid, rgmii-txid, rtbi, smii
xgmii, moca, qsgmii, trgmii, 1000base-x, 2500base-x, rxaui,
unknown