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1Macronix NANDs Device Tree Bindings2-----------------------------------3 4Macronix NANDs support randomizer operation for scrambling user data,5which can be enabled with a SET_FEATURE. The penalty when using the6randomizer are subpage accesses prohibited and more time period needed7for program operation, i.e., tPROG 300us to 340us (randomizer enabled).8Enabling the randomizer is a one time persistent and non reversible9operation.10 11For more high-reliability concern, if subpage write is not available12with hardware ECC and not enabled at UBI level, then enabling the13randomizer is recommended by default by adding a new specific property14in children nodes.15 16Required NAND chip properties in children mode:17- randomizer enable: should be "mxic,enable-randomizer-otp"18 19Example:20 21 nand: nand-controller@unit-address {22 23 nand@0 {24 reg = <0>;25 mxic,enable-randomizer-otp;26 };27 };28