mtd: add init_size hook for NAND driver

Not all the NAND devices have all the information in additional
id bytes.

So add a hook in the nand_chip{} is a good method to calculate the
right value of oobsize, erasesize and so on.

Without the hook,you will get the wrong value, and you have to hack
in the ->scan_bbt() to change the wrong value which make the code
mess.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 0b70c175999c..53f4e41836f1 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2976,8 +2976,10 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 
         chip->chipsize = (uint64_t)type->chipsize << 20;
 
-        /* Newer devices have all the information in additional id bytes */
-        if (!type->pagesize) {
+        if (!type->pagesize && chip->init_size) {
+                /* set the pagesize, oobsize, erasesize by the driver*/
+                busw = chip->init_size(mtd, chip, id_data);
+        } else if (!type->pagesize) {
                 int extid;
                 /* The 3rd id byte holds MLC / multichip data */
                 chip->cellinfo = id_data[2];