From ab6016e0c134c3a564e6750f5b246ba17ada4686 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Tue, 12 May 2015 10:33:25 -0700 Subject: 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 Signed-off-by: David S. Miller --- Documentation/devicetree/bindings/net/phy.txt | 3 +++ 1 file changed, 3 insertions(+) (limited to 'Documentation') 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 { -- cgit v1.2.3