Required properties:
- compatible : "st,spear600-smi"
- reg : Address range of the mtd chip
- #address-cells, #size-cells : Must be present if the device has sub-nodes
representing partitions.
- interrupts: Should contain the STMMAC interrupts
- clock-rate : Functional clock rate of SMI in Hz
Optional properties:
- st,smi-fast-mode : Flash supports read in fast mode