Documentation/devicetree/bindings/net/microchip,enc28j60.txt

   1 * Microchip ENC28J60
   2
   3 This is a standalone 10 MBit ethernet controller with SPI interface.
   4
   5 For each device connected to a SPI bus, define a child node within
   6 the SPI master node.
   7
   8 Required properties:
   9 - compatible: Should be "microchip,enc28j60"
  10 - reg: Specify the SPI chip select the ENC28J60 is wired to
  11 - interrupts: Specify the interrupt index within the interrupt controller (referred
  12               to above in interrupt-parent) and interrupt type. The ENC28J60 natively
  13               generates falling edge interrupts, however, additional board logic
  14               might invert the signal.
  15 - pinctrl-names: List of assigned state names, see pinctrl binding documentation.
  16 - pinctrl-0: List of phandles to configure the GPIO pin used as interrupt line,
  17              see also generic and your platform specific pinctrl binding
  18              documentation.
  19
  20 Optional properties:
  21 - spi-max-frequency: Maximum frequency of the SPI bus when accessing the ENC28J60.
  22   According to the ENC28J80 datasheet, the chip allows a maximum of 20 MHz, however,
  23   board designs may need to limit this value.
  24 - local-mac-address: See ethernet.txt in the same directory.
  25
  26
  27 Example (for NXP i.MX28 with pin control stuff for GPIO irq):
  28
  29         ssp2: ssp@80014000 {
  30                 compatible = "fsl,imx28-spi";
  31                 pinctrl-names = "default";
  32                 pinctrl-0 = <&spi2_pins_b &spi2_sck_cfg>;
  33
  34                 enc28j60: ethernet@0 {
  35                         compatible = "microchip,enc28j60";
  36                         pinctrl-names = "default";
  37                         pinctrl-0 = <&enc28j60_pins>;
  38                         reg = <0>;
  39                         interrupt-parent = <&gpio3>;
  40                         interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
  41                         spi-max-frequency = <12000000>;
  42                 };
  43         };
  44
  45         pinctrl@80018000 {
  46                 enc28j60_pins: enc28j60_pins@0 {
  47                         reg = <0>;
  48                         fsl,pinmux-ids = <
  49                                 MX28_PAD_AUART0_RTS__GPIO_3_3    /* Interrupt */
  50                         >;
  51                         fsl,drive-strength = <MXS_DRIVE_4mA>;
  52                         fsl,voltage = <MXS_VOLTAGE_HIGH>;
  53                         fsl,pull-up = <MXS_PULL_DISABLE>;
  54                 };
  55         };