tjh.dev
Linux kernel mirror (for testing)
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1Microchip LAN78xx Gigabit Ethernet controller
2
3The LAN78XX devices are usually configured by programming their OTP or with
4an external EEPROM, but some platforms (e.g. Raspberry Pi 3 B+) have neither.
5The Device Tree properties, if present, override the OTP and EEPROM.
6
7Required properties:
8- compatible: Should be one of "usb424,7800", "usb424,7801" or "usb424,7850".
9
10Optional properties:
11- local-mac-address: see ethernet.txt
12- mac-address: see ethernet.txt
13
14Optional properties of the embedded PHY:
15- microchip,led-modes: a 0..4 element vector, with each element configuring
16 the operating mode of an LED. Omitted LEDs are turned off. Allowed values
17 are defined in "include/dt-bindings/net/microchip-lan78xx.h".
18
19Example:
20
21/* Based on the configuration for a Raspberry Pi 3 B+ */
22&usb {
23 usb-port@1 {
24 compatible = "usb424,2514";
25 reg = <1>;
26 #address-cells = <1>;
27 #size-cells = <0>;
28
29 usb-port@1 {
30 compatible = "usb424,2514";
31 reg = <1>;
32 #address-cells = <1>;
33 #size-cells = <0>;
34
35 ethernet: ethernet@1 {
36 compatible = "usb424,7800";
37 reg = <1>;
38 local-mac-address = [ 00 11 22 33 44 55 ];
39
40 mdio {
41 #address-cells = <0x1>;
42 #size-cells = <0x0>;
43 eth_phy: ethernet-phy@1 {
44 reg = <1>;
45 microchip,led-modes = <
46 LAN78XX_LINK_1000_ACTIVITY
47 LAN78XX_LINK_10_100_ACTIVITY
48 >;
49 };
50 };
51 };
52 };
53 };
54};