diff options
| author | Andrew Lunn <andrew@lunn.ch> | 2020-04-20 01:04:02 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-04-20 22:37:08 +0300 |
| commit | 3c01eb62d1bd85a5dd1d22d74339728666ae2c45 (patch) | |
| tree | f8aa28032665f846453415cddc78b8dca8b84580 /Documentation/devicetree/bindings/net | |
| parent | 3e782985cb3ce00a32c372b37d8feefdae18ddf1 (diff) | |
| download | linux-3c01eb62d1bd85a5dd1d22d74339728666ae2c45.tar.xz | |
net: ethernet: fec: Allow the MDIO preamble to be disabled
An MDIO transaction normally starts with 32 1s as a preamble. However
not all devices requires such a preamble. Add a device tree property
which allows the preamble to be suppressed. This will half the size of
the MDIO transaction, allowing faster transactions. But it should only
be used when all devices on the bus support suppressed preamble.
Suggested-by: Chris Healy <Chris.Healy@zii.aero>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/devicetree/bindings/net')
| -rw-r--r-- | Documentation/devicetree/bindings/net/mdio.yaml | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/mdio.yaml b/Documentation/devicetree/bindings/net/mdio.yaml index ab4a9df8b8e2..cd6c6ae6dabb 100644 --- a/Documentation/devicetree/bindings/net/mdio.yaml +++ b/Documentation/devicetree/bindings/net/mdio.yaml @@ -45,6 +45,12 @@ properties: defined 2.5MHz should only be used when all devices on the bus support the given clock speed. + suppress-preamble: + description: + The 32 bit preamble should be suppressed. In order for this to + work, all devices on the bus must support suppressed preamble. + type: boolean + patternProperties: "^ethernet-phy@[0-9a-f]+$": type: object |