[PATCH v6 0/4] mtd:nand:omap2: clean-up of supported ECC schemes

[Pekon Gupta]

*Changes v5 -> v6*
[PATCH 1/4]: 
	- updated DT binding for gpmc-nand based on 'Olof Johansson's feedbacks
	http://lists.infradead.org/pipermail/linux-mtd/2013-August/048394.html
	- detection of ELM device via ti,elm-id DT node, moved to gpmc.c driver
[PATCH 2/4]
	- removed: support for following obselete ECC schemes
	OMAP_ECC_HAMMING_CODE_DEFAULT (S/W based 1-bit Hamming ECC)
	OMAP_ECC_HAMMING_CODE_HW_ROMCODE (H/W based 1-bit Hamming ECC scheme)
	- updated: using omap_oobinfo as chip->ecc.layout for all ecc-schemes
	- clean: error messages
[PATCH 3/4] cleaned to include changes for OMAP_ECC_BCH8_CODE_HW only
[PATCH 4/4] updated to include DT property changes


*Changes v4 -> v5*
- Rebased to linux-next 
IMPORTANT: Need to revert commit fb1585b, [PATCH 2/4] part of previous version
	http://lists.infradead.org/pipermail/linux-mtd/2013-July/047441.html

- Swapped PATCH-1 & PATCH-2 to maintain bisectibility & compilation dependency
	http://lists.infradead.org/pipermail/linux-mtd/2013-July/047461.html

- PATCH-2: re-ordered call to is_elm_present() for later updates ELM driver
	- dropped changes in include/linux/platform_data/elm.h (not needed)
- PATCH-3: re-ordered call to is_elm_present() for later updates ELM driver
- Re-formated patch description (replaced tabs with white-spaces)


*Changes v3 -> v4*
(Resent with CC: devicetree-discuss at lists.ozlabs.org)
- [Patch 1/3] removed MTD_NAND_OMAP_BCH8 & MTD_NAND_OMAP_BCH4 from nand/Kconfig
	ECC scheme selectable via nand DT (nand-ecc-opt).
- [*] rebased for l2-mtd.git


*Changes v2 -> v3*
(Resent with Author Name fixed)
- PATCH-1: re-arranged code to remove redundancy, added NAND_BUSWIDTH_AUTO
- PATCH-2: updated nand-ecc-opt DT mapping and Documentation
- PATCH-3: code-cleaning + changes to match PATCH-1
- PATCH-4 <DROPPED> update DT attribute for ti,nand-ecc-opt 
	- received feedback to keep DT mapping independent of linuxism
- PATCH-4:<NEW> : ARM: dts: AM33xx: updated default ECC scheme in nand-ecc-opt
	- independent patch for AM335x-evm.dts update based on PATCH-2


*Changes v1 -> v2*
	added 	[PATCH 3/4] and [PATCH 4/4]


*Patches in this series*
[PATCH 1/4]->[PATCH v5 2/4]: clean-up and optimization for supported ECC schemes.
[PATCH 2/4]->[PATCH v5 1/4]: add separate DT options each supported ECC scheme.
[PATCH 3/4]: update BCH4 ECC implementation (using ELM or using lib/bch.h)
[PATCH 4/4]: ARM: dts: AM33xx: updated default ECC scheme in nand-ecc-opt

After this patch series, omap2-nand driver will supports following ECC schemes:
+---------------------------------------+---------------+---------------+
| ECC scheme                            |ECC calculation|Error detection|
+---------------------------------------+---------------+---------------+
|OMAP_ECC_HAMMING_CODE_HW               |H/W (GPMC)     |S/W            |
+---------------------------------------+---------------+---------------+
|OMAP_ECC_BCH4_CODE_HW_DETECTION_SW     |H/W (GPMC)     |S/W (lib/bch.h)|
|OMAP_ECC_BCH4_CODE_HW                  |H/W (GPMC)     |H/W (ELM)      |
+---------------------------------------+---------------+---------------+
|OMAP_ECC_BCH8_CODE_HW_DETECTION_SW     |H/W (GPMC)     |S/W (lib/bch.h)|
|OMAP_ECC_BCH8_CODE_HW                  |H/W (GPMC)     |H/W (ELM)      |
+---------------------------------------+---------------+---------------+
- Selection of OMAP_ECC_BCHx_CODE_HW_DETECTION_SW requires,
	Kconfig: CONFIG_MTD_NAND_ECC_BCH: enables S/W based BCH ECC algorithm.

- Selection of OMAP_ECC_BCHx_CODE_HW requires,
	Kconfig: CONFIG_MTD_NAND_OMAP_BCH: enables ELM H/W module.

Pekon Gupta (4):
  ARM: OMAP2+: cleaned-up DT support of various ECC schemes
  mtd:nand:omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in
    device_probe
  mtd:nand:omap2: updated support for BCH4 ECC scheme
  ARM: dts: AM33xx: updated default ECC scheme in nand-ecc-opt

 .../devicetree/bindings/mtd/gpmc-nand.txt          |  14 +-
 arch/arm/boot/dts/am335x-evm.dts                   |   2 +-
 arch/arm/mach-omap2/board-flash.c                  |   2 +-
 arch/arm/mach-omap2/gpmc.c                         |  47 +-
 drivers/mtd/nand/Kconfig                           |  30 +-
 drivers/mtd/nand/omap2.c                           | 526 ++++++++++-----------
 include/linux/platform_data/mtd-nand-omap2.h       |  18 +-
 7 files changed, 309 insertions(+), 330 deletions(-)

-- 
1.8.1