diff options
| author | Nick Bowler <nbowler@elliptictech.com> | 2012-11-07 10:20:34 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-10 01:38:15 +0400 |
| commit | 56277f40d73f12d9ffb12b5a6bd7e0ad1f2284b3 (patch) | |
| tree | 75e5fe8498c57e8d7863dfd1b0146e5eec04fcb7 | |
| parent | b1ead1aea1d7e3c260d896943056453717577525 (diff) | |
| download | linux-56277f40d73f12d9ffb12b5a6bd7e0ad1f2284b3.tar.xz | |
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: Nick Bowler <nbowler@elliptictech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-mdio | 9 | ||||
| -rw-r--r-- | drivers/net/phy/mdio_bus.c | 14 |
2 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-mdio b/Documentation/ABI/testing/sysfs-bus-mdio new file mode 100644 index 000000000000..6349749ebc29 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-mdio @@ -0,0 +1,9 @@ +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. diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index c1ef3000ea60..044b5326459f 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -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); |