[PATCH v2 00/12] mtd: nand_bbt: introduce independent nand BBT

From: Peter Pan
Date: Tue Dec 15 2015 - 01:15:13 EST

Currently nand_bbt.c is tied with struct nand_chip, and it makes other
NAND family chips hard to use nand_bbt.c. Maybe it's the reason why
onenand has own bbt(onenand_bbt.c).

Separate struct nand_chip from BBT code can make current BBT shareable.
We create struct nand_bbt to take place of nand_chip in nand_bbt.c.
Struct nand_bbt contains all the information BBT needed from outside and
it should be embedded into NAND family chip struct (such as struct nand_chip).
NAND family driver should allocate, initialize and free struct nand_bbt.

Below is mtd folder structure we want:
âââ Kconfig
âââ Makefile
âââ ...
âââ nand_bbt.c
âââ nand
â âââ Kconfig
â âââ Makefile
â âââ nand_base.c
â âââ nand_ids.c
â âââ ...
â âââ xway_nand.c
âââ spi-nand
â âââ Kconfig
â âââ Makefile
â âââ spi-nand-base.c
â âââ ...
â âââ spi-nand-device.c
âââ ...

Most of the patch is borrowed from Brian Norris <computersforpeace@xxxxxxxxx>.
Based on Brian's suggestion, I make my previous BBT patch into 12 independent
patches. Previous patch is http://patchwork.ozlabs.org/patch/492066/
Beside the patch split, I also moved nand_bbt.c to mtd folder, which didn't in
previous patch.

Patch 3, 7, 8, 9, 10 and 11 are totally borrowed from Brian's git tree. I just
test and split the code into independent patch. Patch 1, 2, 5 and 6 are partial
borrowed. I make some changes from Brian's git tree and the changes are recorded
in commit log. Patch 4 and 12 are written by me.

The patch is tested on Zed board.

v2 changes:
rebase patch series on master branch of l2-mtd.git

Brian Norris (10):
mtd: nand_bbt: new header for nand family BBT
mtd: nand_bbt: introduce struct nand_bbt
mtd: nand_bbt: add new API definitions
mtd: nand: use new BBT API instead of old ones
mtd: nand_bbt: use erase() and is_bad_bbm() hook in BBT
mtd: nand: make nand_erase_nand() static
mtd: nand_bbt: remove struct nand_chip from nand_bbt.c
mtd: nand_bbt: remove old API definitions
mtd: nand_bbt: remove NAND_BBT_DYNAMICSTRUCT macro
mtd: nand: remove nand_chip.bbt

Peter Pan (2):
mtd: nand_bbt: add nand_bbt_markbad_factory() interface
mtd: nand-bbt: move nand_bbt.c to mtd folder

drivers/mtd/Kconfig | 7 +
drivers/mtd/Makefile | 1 +
drivers/mtd/nand/Kconfig | 2 +-
drivers/mtd/nand/Makefile | 2 +-
drivers/mtd/nand/docg4.c | 6 +-
drivers/mtd/nand/nand_base.c | 145 +++++++++-
drivers/mtd/{nand => }/nand_bbt.c | 542 ++++++++++++++++----------------------
include/linux/mtd/bbm.h | 96 +------
include/linux/mtd/nand.h | 16 +-
include/linux/mtd/nand_bbt.h | 177 +++++++++++++
10 files changed, 562 insertions(+), 432 deletions(-)
rename drivers/mtd/{nand => }/nand_bbt.c (68%)
create mode 100644 include/linux/mtd/nand_bbt.h


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