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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