3 - nand-ecc-mode : String, operation mode of the NAND ecc mode.
4 Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first",
6 - nand-bus-width : 8 or 16 bus width if not present 8
7 - nand-on-flash-bbt: boolean to enable on flash bbt option if not present false
9 - nand-ecc-strength: integer representing the number of bits to correct
12 - nand-ecc-step-size: integer representing the number of data bytes
13 that are covered by a single ECC step.
15 The ECC strength and ECC step size properties define the correction capability
16 of a controller. Together, they say a controller can correct "{strength} bit
17 errors per {size} bytes".
19 The interpretation of these parameters is implementation-defined, so not all
20 implementations must support all possible combinations. However, implementations
21 are encouraged to further specify the value(s) they support.