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mtd: add init_size hook for NAND driver

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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 <[email protected]>
Signed-off-by: David Woodhouse <[email protected]>
This commit is contained in:
Huang Shijie 2010-09-27 10:43:53 +08:00 • committed by David Woodhouse
commit 12a40a57f7
2 changed files with 10 additions and 2 deletions
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6
drivers/mtd/nand/nand_base.c
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@ -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];