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authorNick Bowler <nbowler@elliptictech.com>2012-11-07 06:20:34 +0000
committerDavid S. Miller <davem@davemloft.net>2012-11-09 16:38:15 -0500
commit56277f40d73f12d9ffb12b5a6bd7e0ad1f2284b3 (patch)
tree75e5fe8498c57e8d7863dfd1b0146e5eec04fcb7 /drivers/net/phy/mdio_bus.c
parentb1ead1aea1d7e3c260d896943056453717577525 (diff)
downloadlinux-linaro-stable-56277f40d73f12d9ffb12b5a6bd7e0ad1f2284b3.tar.gz
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>
Diffstat (limited to 'drivers/net/phy/mdio_bus.c')
-rw-r--r--drivers/net/phy/mdio_bus.c14
1 files changed, 14 insertions, 0 deletions
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);