mtd: support ONFI multi lun NAND

With onfi a flash is organized into one or more logical units (LUNs).
A logical unit (LUN) is the minimum unit that can independently execute
commands and report status.

Mtd does not exploit LUN, so make it see a big single flash where size is
lun_size * number_of_lun.

Without this patch MT29F8G08ADBDAH4 size is 512MiB instead of 1GiB.

Artem: split long line on 2 shorter ones.

Signed-off-by: Matthieu Castet <matthieu.castet@parrot.com>
Acked-by: Florian Fainelli <ffainelli@freebox.fr>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 8008853756c9..0bcc71539b16 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2893,7 +2893,8 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip,
         mtd->writesize = le32_to_cpu(p->byte_per_page);
         mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize;
         mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
-        chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) * mtd->erasesize;
+        chip->chipsize = le32_to_cpu(p->blocks_per_lun);
+        chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count;
         *busw = 0;
         if (le16_to_cpu(p->features) & 1)
                 *busw = NAND_BUSWIDTH_16;