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Documentation / devicetree / bindings / net / fixed-link.txt




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Based on kernel version 3.16. Page generated on 2014-08-06 21:37 EST.

1	Fixed link Device Tree binding
2	------------------------------
3	
4	Some Ethernet MACs have a "fixed link", and are not connected to a
5	normal MDIO-managed PHY device. For those situations, a Device Tree
6	binding allows to describe a "fixed link".
7	
8	Such a fixed link situation is described by creating a 'fixed-link'
9	sub-node of the Ethernet MAC device node, with the following
10	properties:
11	
12	* 'speed' (integer, mandatory), to indicate the link speed. Accepted
13	  values are 10, 100 and 1000
14	* 'full-duplex' (boolean, optional), to indicate that full duplex is
15	  used. When absent, half duplex is assumed.
16	* 'pause' (boolean, optional), to indicate that pause should be
17	  enabled.
18	* 'asym-pause' (boolean, optional), to indicate that asym_pause should
19	  be enabled.
20	
21	Old, deprecated 'fixed-link' binding:
22	
23	* A 'fixed-link' property in the Ethernet MAC node, with 5 cells, of the
24	  form <a b c d e> with the following accepted values:
25	  - a: emulated PHY ID, choose any but but unique to the all specified
26	    fixed-links, from 0 to 31
27	  - b: duplex configuration: 0 for half duplex, 1 for full duplex
28	  - c: link speed in Mbits/sec, accepted values are: 10, 100 and 1000
29	  - d: pause configuration: 0 for no pause, 1 for pause
30	  - e: asymmetric pause configuration: 0 for no asymmetric pause, 1 for
31	    asymmetric pause
32	
33	Example:
34	
35	ethernet@0 {
36		...
37		fixed-link {
38		      speed = <1000>;
39		      full-duplex;
40		};
41		...
42	};
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