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authorFlorian Fainelli <f.fainelli@gmail.com>2015-05-12 20:33:25 +0300
committerDavid S. Miller <davem@davemloft.net>2015-05-14 20:40:55 +0300
commitab6016e0c134c3a564e6750f5b246ba17ada4686 (patch)
tree6fbd6275a5fb0a7acd330ffd46dfd79a22fd7215 /drivers/of/of_mdio.c
parent922f2dd1b65a888e34c472979460dc23211750a2 (diff)
downloadlinux-ab6016e0c134c3a564e6750f5b246ba17ada4686.tar.xz
of: mdio: Add a "broken-turn-around" property
Some Ethernet PHY devices/switches may not properly release the MDIO bus during turn-around time, and fail to drive it low, which can be seen by some controllers as a read failure, while the data clocked in is still correct. Add a boolean property "broken-turn-around" which is parsed by the generic MDIO bus probing code and will set the corresponding bit in the MDIO bus phy_ignore_ta_mask bitmask for MDIO bus drivers to utilize that information. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/of/of_mdio.c')
-rw-r--r--drivers/of/of_mdio.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 0c064485d1c2..fdc60db60829 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -68,6 +68,9 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *chi
phy->irq = mdio->irq[addr];
}
+ if (of_property_read_bool(child, "broken-turn-around"))
+ mdio->phy_ignore_ta_mask |= 1 << addr;
+
/* Associate the OF node with the device structure so it
* can be looked up later */
of_node_get(child);