[PATCH v4 0/6] Export the ECC step size to user applications

[Huang Shijie]

In order to implement the NAND boot for some Freescale's chips, such as
imx23/imx28/imx50/imx6, we use a tool (called kobs-ng) to burn the uboot
and some metadata to nand chip. And the ROM code will use the metadata to
configrate the BCH, and to find the uboot.

The ECC information(ecc step size, ecc strength) which is used to configrate
the BCH is part of the metadata. The kobs-ng can gets the ecc strength from
the sys node /sys/*/mtdX/ecc_strength now. But it can't gets the ecc step size.

This patch set is used to export the ecc step size to user applications.
With this patch set, the kobs-ng can gets the ecc step size now.

v3 --> v4:
	[1] rename the ecc_step to ecc_step_size.

v2 --> v3:
	[1] replace the nand_scan() with nand_scan_ident()/nand_scan_tail(),
	    Let the MTD layer to do the initialization for the ECC info.
	    removed some hack code.
	[2] move the ONFI nand's hooks in nand_set_defaults().
	[3] change the comments.
	[4] misc	

v1 --> v2:
	[1] rename the ecc_size to ecc_step.
	[2] rebase on the latest l2-mtd.

Huang Shijie (6):
  mtd: add a new field to mtd_info{}
  mtd: add a new sys node to show the ecc step size
  mtd: set the ecc step size for master/slave mtd_info
  mtd: set ONFI nand's default hooks in nand_set_defaults()
  mtd: gpmi: remove the nand_scan()
  mtd: update the ABI document about the ecc step size

 Documentation/ABI/testing/sysfs-class-mtd |   10 ++++
 drivers/mtd/mtdcore.c                     |   11 +++++
 drivers/mtd/mtdpart.c                     |    1 +
 drivers/mtd/nand/gpmi-nand/gpmi-nand.c    |   65 +++++++++++++++-------------
 drivers/mtd/nand/nand_base.c              |   13 +++---
 include/linux/mtd/mtd.h                   |    3 +
 6 files changed, 67 insertions(+), 36 deletions(-)