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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.
Examples:
ethernet@0 {
...
fixed-link {
speed = <1000>;
full-duplex;
};
...
};
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