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