Kernel-4.18.0-80.el8_fsl-fec

• Freescale Fast Ethernet Controller (FEC)

Required properties:

• compatible : Should be “fsl,-fec”
• reg : Address and length of the register set for the device
• interrupts : Should contain fec interrupt
• phy-mode : See ethernet.txt file in the same directory

Optional properties:

• phy-reset-gpios : Should specify the gpio for phy reset
• phy-reset-duration : Reset duration in milliseconds. Should present
  only if property “phy-reset-gpios” is available. Missing the property
  will have the duration be 1 millisecond. Numbers greater than 1000 are
  invalid and 1 millisecond will be used instead.
• phy-reset-active-high : If present then the reset sequence using the GPIO
  specified in the “phy-reset-gpios” property is reversed (H=reset state,
  L=operation state).
• phy-reset-post-delay : Post reset delay in milliseconds. If present then
  a delay of phy-reset-post-delay milliseconds will be observed after the
  phy-reset-gpios has been toggled. Can be omitted thus no delay is
  observed. Delay is in range of 1ms to 1000ms. Other delays are invalid.
• phy-supply : regulator that powers the Ethernet PHY.
• phy-handle : phandle to the PHY device connected to this device.
• fixed-link : Assume a fixed link. See fixed-link.txt in the same directory.
  Use instead of phy-handle.
• fsl,num-tx-queues : The property is valid for enet-avb IP, which supports
  hw multi queues. Should specify the tx queue number, otherwise set tx queue
  number to 1.
• fsl,num-rx-queues : The property is valid for enet-avb IP, which supports
  hw multi queues. Should specify the rx queue number, otherwise set rx queue
  number to 1.
• fsl,magic-packet : If present, indicates that the hardware supports waking
  up via magic packet.
• fsl,err006687-workaround-present: If present indicates that the system has
  the hardware workaround for ERR006687 applied and does not need a software
  workaround.
• interrupt-names: names of the interrupts listed in interrupts property in
  the same order. The defaults if not specified are
  Number of interrupts Default
  1 “int0”
  2 “int0”, “pps”
  3 “int0”, “int1”, “int2”
  4 “int0”, “int1”, “int2”, “pps”
  The order may be changed as long as they correspond to the interrupts
  property. Currently, only i.mx7 uses “int1” and “int2”. They correspond to
  tx/rx queues 1 and 2. “int0” will be used for queue 0 and ENET_MII interrupts.
  For imx6sx, “int0” handles all 3 queues and ENET_MII. “pps” is for the pulse
  per second interrupt associated with 1588 precision time protocol(PTP).

Optional subnodes:

• mdio : specifies the mdio bus in the FEC, used as a container for phy nodes
  according to phy.txt in the same directory

Example:

ethernet@83fec000 {
compatible = “fsl,imx51-fec”, “fsl,imx27-fec”;
reg = <0x83fec000 0x4000>;
interrupts = <87>;
phy-mode = “mii”;
phy-reset-gpios = <&gpio2 14 GPIO_ACTIVE_LOW>; /* GPIO2_14 */
local-mac-address = [00 04 9F 01 1B B9];
phy-supply = <&reg_fec_supply>;
};

Example with phy specified:

ethernet@83fec000 {
compatible = “fsl,imx51-fec”, “fsl,imx27-fec”;
reg = <0x83fec000 0x4000>;
interrupts = <87>;
phy-mode = “mii”;
phy-reset-gpios = <&gpio2 14 GPIO_ACTIVE_LOW>; /* GPIO2_14 */
local-mac-address = [00 04 9F 01 1B B9];
phy-supply = <&reg_fec_supply>;
phy-handle = <&ethphy>;
mdio {
ethphy: ethernet-phy@6 {
compatible = “ethernet-phy-ieee802.3-c22”;
reg = <6>;
max-speed = <100>;
};
};
};