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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 /Documentation | |
| 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 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/net/phy.txt | 3 |
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 { |