Kernel-4.18.0-80.el8_microchip,enc28j60

• Microchip ENC28J60

This is a standalone 10 MBit ethernet controller with SPI interface.

For each device connected to a SPI bus, define a child node within
the SPI master node.

Required properties:

• compatible: Should be “microchip,enc28j60”
• reg: Specify the SPI chip select the ENC28J60 is wired to
• interrupt-parent: Specify the phandle of the source interrupt, see interrupt

                binding documentation for details. Usually this is the GPIO bank
                the interrupt line is wired to.
  

• interrupts: Specify the interrupt index within the interrupt controller (referred

          to above in interrupt-parent) and interrupt type. The ENC28J60 natively
          generates falling edge interrupts, however, additional board logic
          might invert the signal.
  

• pinctrl-names: List of assigned state names, see pinctrl binding documentation.
• pinctrl-0: List of phandles to configure the GPIO pin used as interrupt line,

         see also generic and your platform specific pinctrl binding
         documentation.
  

Optional properties:

• spi-max-frequency: Maximum frequency of the SPI bus when accessing the ENC28J60.
  According to the ENC28J80 datasheet, the chip allows a maximum of 20 MHz, however,
  board designs may need to limit this value.
• local-mac-address: See ethernet.txt in the same directory.

Example (for NXP i.MX28 with pin control stuff for GPIO irq):

    ssp2: ssp@80014000 {
            compatible = "fsl,imx28-spi";
            pinctrl-names = "default";
            pinctrl-0 = <&spi2_pins_b &spi2_sck_cfg>;

            enc28j60: ethernet@0 {
                    compatible = "microchip,enc28j60";
                    pinctrl-names = "default";
                    pinctrl-0 = <&enc28j60_pins>;
                    reg = <0>;
                    interrupt-parent = <&gpio3>;
                    interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
                    spi-max-frequency = <12000000>;
            };
    };

    pinctrl@80018000 {
            enc28j60_pins: enc28j60_pins@0 {
                    reg = <0>;
                    fsl,pinmux-ids = <
                            MX28_PAD_AUART0_RTS__GPIO_3_3    /* Interrupt */
                    >;
                    fsl,drive-strength = <MXS_DRIVE_4mA>;
                    fsl,voltage = <MXS_VOLTAGE_HIGH>;
                    fsl,pull-up = <MXS_PULL_DISABLE>;
            };
    };