mtd: nand: add support for Samsung K9LCG08U0B

Assume that:
          tmp = ((extid >> 2) & 0x04) | (extid & 0x03));

From the K9LCG08U0B's datasheet, we know that:
  the oob size is 640 when tmp is 6;
  the oob size is 1024 when tmp is 7;

Signed-off-by: Huang Shijie <b32955@freescale.com>
[Brian: fixed compile issue]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index d388c7f6fec9..59eba5d2c685 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3285,9 +3285,12 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
                         mtd->oobsize = 512;
                         break;
                 case 6:
-                default: /* Other cases are "reserved" (unknown) */
                         mtd->oobsize = 640;
                         break;
+                case 7:
+                default: /* Other cases are "reserved" (unknown) */
+                        mtd->oobsize = 1024;
+                        break;
                 }
                 extid >>= 2;
                 /* Calc blocksize */