| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | }; |