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Diffstat (limited to 'Documentation/devicetree/bindings/net/fixed-link.txt')
-rw-r--r-- | Documentation/devicetree/bindings/net/fixed-link.txt | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/fixed-link.txt b/Documentation/devicetree/bindings/net/fixed-link.txt new file mode 100644 index 000000000..82bf7e0f4 --- /dev/null +++ b/Documentation/devicetree/bindings/net/fixed-link.txt @@ -0,0 +1,42 @@ +Fixed link Device Tree binding +------------------------------ + +Some Ethernet MACs have a "fixed link", and are not connected to a +normal MDIO-managed PHY device. For those situations, a Device Tree +binding allows to describe a "fixed link". + +Such a fixed link situation is described by creating a 'fixed-link' +sub-node of the Ethernet MAC device node, with the following +properties: + +* 'speed' (integer, mandatory), to indicate the link speed. Accepted + values are 10, 100 and 1000 +* 'full-duplex' (boolean, optional), to indicate that full duplex is + used. When absent, half duplex is assumed. +* 'pause' (boolean, optional), to indicate that pause should be + enabled. +* 'asym-pause' (boolean, optional), to indicate that asym_pause should + be enabled. + +Old, deprecated 'fixed-link' binding: + +* A 'fixed-link' property in the Ethernet MAC node, with 5 cells, of the + form <a b c d e> with the following accepted values: + - a: emulated PHY ID, choose any but but unique to the all specified + fixed-links, from 0 to 31 + - b: duplex configuration: 0 for half duplex, 1 for full duplex + - c: link speed in Mbits/sec, accepted values are: 10, 100 and 1000 + - d: pause configuration: 0 for no pause, 1 for pause + - e: asymmetric pause configuration: 0 for no asymmetric pause, 1 for + asymmetric pause + +Example: + +ethernet@0 { + ... + fixed-link { + speed = <1000>; + full-duplex; + }; + ... +}; |