1Macronix NANDs Device Tree Bindings 2----------------------------------- 3 4Macronix NANDs support randomizer operation for scrambling user data, 5which can be enabled with a SET_FEATURE. The penalty when using the 6randomizer are subpage accesses prohibited and more time period needed 7for program operation, i.e., tPROG 300us to 340us (randomizer enabled). 8Enabling the randomizer is a one time persistent and non reversible 9operation. 10 11For more high-reliability concern, if subpage write is not available 12with hardware ECC and not enabled at UBI level, then enabling the 13randomizer is recommended by default by adding a new specific property 14in 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