eth fixed link
编程语言
2019-04-18 09:50:53
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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 |
* '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 |
* 'asym-pause' (boolean, optional), to indicate that asym_pause should |
* 'link-gpios' ('gpio-list', optional), to indicate if a gpio can be read |
to determine if the link is up. |
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 |
link-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>; |
};
转载自blog.csdn.net/samssm/article/details/89371909