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| author | Florian Fainelli <f.fainelli@gmail.com> | 2015-05-12 20:33:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-14 20:40:55 +0300 |
| commit | ab6016e0c134c3a564e6750f5b246ba17ada4686 (patch) | |
| tree | 6fbd6275a5fb0a7acd330ffd46dfd79a22fd7215 /drivers/of | |
| parent | 922f2dd1b65a888e34c472979460dc23211750a2 (diff) | |
| download | linux-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')
| -rw-r--r-- | drivers/of/of_mdio.c | 3 |
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); |