net: phy: expose phydev->has_fixups to sysfs

Expose the PHY device has_fixups boolean as a sysfs property to help
troubleshooting PHY configurations.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 20 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-mdio b/Documentation/ABI/testing/sysfs-bus-mdio
index 2133afd0b067..491baaf4285f 100644
--- a/Documentation/ABI/testing/sysfs-bus-mdio
+++ b/Documentation/ABI/testing/sysfs-bus-mdio
@@ -17,3 +17,13 @@ Description:
                 Ethernet driver during bus enumeration, encoded in string.
                 This interface mode is used to configure the Ethernet MAC with the
                 appropriate mode for its data lines to the PHY hardware.
+
+What:           /sys/bus/mdio_bus/devices/.../phy_has_fixups
+Date:           February 2014
+KernelVersion:  3.15
+Contact:        netdev@vger.kernel.org
+Description:
+                This attribute contains the boolean value whether a given PHY
+                device has had any "fixup" workaround running on it, encoded as
+                a boolean. This information is provided to help troubleshooting
+                PHY configurations.
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 7c66ea095a46..76f54b32a120 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -441,9 +441,19 @@ phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
 }
 static DEVICE_ATTR_RO(phy_interface);
 
+static ssize_t
+phy_has_fixups_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct phy_device *phydev = to_phy_device(dev);
+
+        return sprintf(buf, "%d\n", phydev->has_fixups);
+}
+static DEVICE_ATTR_RO(phy_has_fixups);
+
 static struct attribute *mdio_dev_attrs[] = {
         &dev_attr_phy_id.attr,
         &dev_attr_phy_interface.attr,
+        &dev_attr_phy_has_fixups.attr,
         NULL,
 };
 ATTRIBUTE_GROUPS(mdio_dev);