[PATCH v4 0/4] Mediatek MT2712 NAND FLASH Controller driver

[Xiaolei Li <xiaolei.li-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>]

The following patch-set adds support for Mediatek MT2712 NAND FLASH
Controller.

Changes on v4 relative to:
--------------------

tree    : https://github.com/bbrezillon/linux-0day
branch  : nand/next
commit  :
        'commit 2b12c057cc28 ("mtd: nand: brcmnand: Check flash #WP pin
         status before nand erase/program")'

Patch v4:
---------
- remove spare size array sort. iterate over all entries of spare size
  table and pick the best one.

Patch v3:
---------
- separate patches into 4.
- rename struct mtk_ecc_devdata and struct mtk_nfc_devdata to struct
  mtk_ecc_caps and struct mtk_nfc_caps respectively.
- add variables const u8 *ecc_strength and u8 num_ecc_strength into struct
  mtk_ecc_caps, and remove u8 max_ecc_strength.
- rename variabl u32 temp in function mtk_ecc_probe to u32 max_eccdata_size.
- remove ECC_CNFG_xBIT define, use a for loop to do ecc hw configuration.
- remove const u32 *spare_format from struct mtk_nfc_caps, and add variables
  u8 num_spare_size and u8 pageformat_spare_shift.
- remove PAGEFMT_SPARE_ define, use a for loop to do nfc hw configuration.
- sort spare size array before setting spare size.
- fix coding style issue.

Patch v2:
---------
- sperate patches into 3.
- refine DT bindings documentation about NFC and ECC compatible.
- use ecc->devdata->encode_parity_reg0 and ecc->devdata->err_mask
  directly, but hide them in define.

Tests:
------

* ubifs and jffs2 are validated on NAND device MT29F16G08ADBCA
  by 'dd' command.
* all drivers/mtd/tests/* pass.
* speed test:
  eraseblock write speed is 8318 KiB/s
  eraseblock read speed is 11374 KiB/s
  page write speed is 8155 KiB/s
  page read speed is 11290 KiB/s
  2 page write speed is 8217 KiB/s
  2 page read speed is 11354 KiB/s
  erase speed is 116472 KiB/s
  2x multi-block erase speed is 352978 KiB/s
  4x multi-block erase speed is 359750 KiB/s
  8x multi-block erase speed is 361484 KiB/s
  16x multi-block erase speed is 364116 KiB/s
  32x multi-block erase speed is 364116 KiB/s
  64x multi-block erase speed is 364116 KiB/s

Xiaolei Li (4):
  mtd: nand: mediatek: update DT bindings
  mtd: nand: mediatek: refine register NFI_PAGEFMT setting
  mtd: nand: mediatek: add support for different MTK NAND FLASH
    Controller IP
  mtd: nand: mediatek: add support for MT2712 NAND FLASH Controller

 Documentation/devicetree/bindings/mtd/mtk-nand.txt |   5 +-
 drivers/mtd/nand/mtk_ecc.c                         | 218 ++++++++++-----------
 drivers/mtd/nand/mtk_ecc.h                         |   2 +-
 drivers/mtd/nand/mtk_nand.c                        | 183 +++++++++--------
 4 files changed, 202 insertions(+), 206 deletions(-)

--
1.9.1