uboot/doc/README.JFFS2_NAND
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   1JFFS2 NAND support:
   2
   3To enable, use the following #define in the board configuration file:
   4
   5#define CONFIG_JFFS2_NAND
   6
   7Configuration of partitions is similar to how this is done in  U-Boot
   8for  JFFS2  on top NOR flash.
   9