linux/Documentation/devicetree/bindings/mtd/arm-versatile.txt
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   1Flash device on ARM Versatile board
   2
   3Required properties:
   4- compatible : must be "arm,versatile-flash";
   5- bank-width : width in bytes of flash interface.
   6
   7The device tree may optionally contain sub-nodes describing partitions of the
   8address space. See partition.txt for more detail.
   9