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authorFlorian Fainelli <f.fainelli@gmail.com>2015-05-12 10:33:25 -0700
committerDavid S. Miller <davem@davemloft.net>2015-05-14 13:40:55 -0400
commitab6016e0c134c3a564e6750f5b246ba17ada4686 (patch)
tree6fbd6275a5fb0a7acd330ffd46dfd79a22fd7215 /Documentation
parent922f2dd1b65a888e34c472979460dc23211750a2 (diff)
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 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/net/phy.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/phy.txt b/Documentation/devicetree/bindings/net/phy.txt
index 40831fbaff72..525e1658f2da 100644
--- a/Documentation/devicetree/bindings/net/phy.txt
+++ b/Documentation/devicetree/bindings/net/phy.txt
@@ -30,6 +30,9 @@ Optional Properties:
- max-speed: Maximum PHY supported speed (10, 100, 1000...)
+- broken-turn-around: If set, indicates the PHY device does not correctly
+ release the turn around line low at the end of a MDIO transaction.
+
Example:
ethernet-phy@0 {