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Commit 56277f40 authored by Nick Bowler's avatar Nick Bowler Committed by David S. Miller
Browse files

phylib: mdio: Add sysfs attribute for PHY identifiers. 



This adds a phy_id sysfs attribute to MDIO devices, containing the
32-bit PHY identifier reported by the device.  This attribute can
be useful when debugging problems related to phy drivers.  Other
enumerable buses already have similar attributes.

Signed-off-by: default avatarNick Bowler <nbowler@elliptictech.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b1ead1ae

Documentation/ABI/testing/sysfs-bus-mdio

0 → 100644
+9 −0
Original line number Diff line number Diff line 
What:		/sys/bus/mdio_bus/devices/.../phy_id

Date:		November 2012

KernelVersion:	3.8

Contact:	netdev@vger.kernel.org

Description:

		This attribute contains the 32-bit PHY Identifier as reported

		by the device during bus enumeration, encoded in hexadecimal.

		This ID is used to match the device with the appropriate

		driver.

drivers/net/phy/mdio_bus.c

+14 −0
Original line number Diff line number Diff line
@@ -431,10 +431,24 @@ static struct dev_pm_ops mdio_bus_pm_ops = { 


#endif /* CONFIG_PM */



static ssize_t

phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)

{

	struct phy_device *phydev = to_phy_device(dev);



	return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);

}



static struct device_attribute mdio_dev_attrs[] = {

	__ATTR_RO(phy_id),

	__ATTR_NULL

};



struct bus_type mdio_bus_type = {

	.name		= "mdio_bus",

	.match		= mdio_bus_match,

	.pm		= MDIO_BUS_PM_OPS,

	.dev_attrs	= mdio_dev_attrs,

};

EXPORT_SYMBOL(mdio_bus_type);