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Altera_Forum
Honored Contributor I
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Fixed-link Feature

这种特性主要是为了解决没有使用mdio进行管理的Phy设备。 

 

首先是设备树,内核,以及内核配置三块。 

 

第一: 

设备树: 

有两种写法,据测试现在都是可行的: 

之前是这种写法, 

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 

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A 'fixed-link' sub-node of the Ethernet MAC device node, with the followingproperties: 

* '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. 

* 'link-gpios' ('gpio-list', optional), to indicate if a gpio can be read to determine if the link is up. 

 

https://alteraforum.com/forum/attachment.php?attachmentid=14009&stc=1  

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