Documentation/devicetree/bindings/net/microchip,lan78xx.txt

   1 Microchip LAN78xx Gigabit Ethernet controller
   2
   3 The LAN78XX devices are usually configured by programming their OTP or with
   4 an external EEPROM, but some platforms (e.g. Raspberry Pi 3 B+) have neither.
   5 The Device Tree properties, if present, override the OTP and EEPROM.
   6
   7 Required properties:
   8 - compatible: Should be one of "usb424,7800", "usb424,7801" or "usb424,7850".
   9
  10 The MAC address will be determined using the optional properties
  11 defined in ethernet.txt.
  12
  13 Optional properties of the embedded PHY:
  14 - microchip,led-modes: a 0..4 element vector, with each element configuring
  15   the operating mode of an LED. Omitted LEDs are turned off. Allowed values
  16   are defined in "include/dt-bindings/net/microchip-lan78xx.h".
  17 - microchip,downshift-after: sets the number of failed auto-negotiation
  18   attempts after which the link is downgraded from 1000BASE-T. Should be one of
  19   2, 3, 4, 5 or 0, where 0 means never downshift.
  20
  21 Example:
  22
  23 /* Based on the configuration for a Raspberry Pi 3 B+ */
  24 &usb {
  25         usb-port@1 {
  26                 compatible = "usb424,2514";
  27                 reg = <1>;
  28                 #address-cells = <1>;
  29                 #size-cells = <0>;
  30
  31                 usb-port@1 {
  32                         compatible = "usb424,2514";
  33                         reg = <1>;
  34                         #address-cells = <1>;
  35                         #size-cells = <0>;
  36
  37                         ethernet: ethernet@1 {
  38                                 compatible = "usb424,7800";
  39                                 reg = <1>;
  40                                 local-mac-address = [ 00 11 22 33 44 55 ];
  41
  42                                 mdio {
  43                                         #address-cells = <0x1>;
  44                                         #size-cells = <0x0>;
  45                                         eth_phy: ethernet-phy@1 {
  46                                                 reg = <1>;
  47                                                 microchip,led-modes = <
  48                                                         LAN78XX_LINK_1000_ACTIVITY
  49                                                         LAN78XX_LINK_10_100_ACTIVITY
  50                                                 >;
  51                                         };
  52                                 };
  53                         };
  54                 };
  55         };
  56 };