@@ -50,14 +50,19 @@ Optional:
- nand-on-flash-bbt: Store BBT on NAND Flash.
- nand-ecc-mode: the NAND ecc mode (check driver for supported modes)
- nand-ecc-step-size: Number of data bytes covered by a single ECC step.
- valid values: 512 and 1024.
+ valid values:
+ 512 and 1024 on mt2701 and mt2712.
+ 512 only on mt7622.
1024 is recommended for large page NANDs.
- nand-ecc-strength: Number of bits to correct per ECC step.
- The valid values that the controller supports are: 4, 6,
- 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36, 40, 44,
- 48, 52, 56, 60.
+ The valid values that each controller supports:
+ mt2701: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28,
+ 32, 36, 40, 44, 48, 52, 56, 60.
+ mt2712: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28,
+ 32, 36, 40, 44, 48, 52, 56, 60, 68, 72, 80.
+ mt7622: 4, 6, 8, 10, 12, 14, 16.
The strength should be calculated as follows:
- E = (S - F) * 8 / 14
+ E = (S - F) * 8 / B
S = O / (P / Q)
E : nand-ecc-strength.
S : spare size per sector.
@@ -66,6 +71,9 @@ Optional:
O : oob size.
P : page size.
Q : nand-ecc-step-size.
+ B : parity bits to do 1 bit ECC.
+ Be 14 on mt2701 and mt2712.
+ Be 13 on mt7622.
If the result does not match any one of the listed
choices above, please select the smaller valid value from
the list.
Update ecc step size, ecc strength, and parity bits supported on each MTK NAND controller. Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com> --- Documentation/devicetree/bindings/mtd/mtk-nand.txt | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-)