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: mtd ├── Kconfig ├── Makefile ├── ... ├── nand_bbt.c ├── nand │ ├── Kconfig │ ├── Makefile │ ├── nand_base.c │ ├── nand_ids.c │ ├── ... │ └── xway_nand.c ├── spi-nand │ ├── Kconfig │ ├── Makefile │ ├── spi-nand-base.c │ ├── ... │ └── spi-nand-device.c └── ... Most of the patch is borrowed from Brian Norris <computersforpe...@gmail.com>. http://git.infradead.org/users/norris/linux-mtd.git/shortlog/refs/heads/nand-bbt 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 -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/