The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/mtd/nand-macronix.txt

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    1 Macronix NANDs Device Tree Bindings
    2 -----------------------------------
    3 
    4 Macronix NANDs support randomizer operation for scrambling user data,
    5 which can be enabled with a SET_FEATURE. The penalty when using the
    6 randomizer are subpage accesses prohibited and more time period needed
    7 for program operation, i.e., tPROG 300us to 340us (randomizer enabled).
    8 Enabling the randomizer is a one time persistent and non reversible
    9 operation.
   10 
   11 For more high-reliability concern, if subpage write is not available
   12 with hardware ECC and not enabled at UBI level, then enabling the
   13 randomizer is recommended by default by adding a new specific property
   14 in children nodes.
   15 
   16 Required NAND chip properties in children mode:
   17 - randomizer enable: should be "mxic,enable-randomizer-otp"
   18 
   19 Example:
   20 
   21         nand: nand-controller@unit-address {
   22 
   23                 nand@0 {
   24                         reg = <0>;
   25                         mxic,enable-randomizer-otp;
   26                 };
   27         };

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