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* [PATCH v3 0/3] mtd: nand: OMAP: ELM error correction support for BCH ecc
@ 2012-11-29 11:46 Philip, Avinash
  2012-11-29 11:46 ` [PATCH v3 1/3] mtd: nand: omap2: Update nerrors using ecc.strength Philip, Avinash
                   ` (2 more replies)
  0 siblings, 3 replies; 13+ messages in thread
From: Philip, Avinash @ 2012-11-29 11:46 UTC (permalink / raw)
  To: dwmw2-wEGCiKHe2LqWVfeAwA7xHQ,
	artem.bityutskiy-VuQAYsv1563Yd54FQh9/CA, afzal-l0cyMroinI0,
	tony-4v6yS6AI5VpBDgjK7y7TUQ,
	broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E,
	rmk+kernel-lFZ/pmaqli7XmaaqVzeoHQ,
	gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r
  Cc: linux-doc-u79uwXL29TY76Z2rM5mHXA,
	devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ, nsekhar-l0cyMroinI0,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA, gururaja.hebbar-l0cyMroinI0,
	linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Philip, Avinash,
	ivan.djelic-ITF29qwbsa/QT0dZR+AlfA,
	linux-omap-u79uwXL29TY76Z2rM5mHXA,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r

Support to use ELM as BCH 4 & 8 bit error correction module. Also performance
enhancement by adding single shot read_page and write_page functions for the
nand flashes with page size less than 4 KB.

ELM module can be used to correct errors reported by BCH 4, 8 & 16 bit
ECC scheme. For now only 4 & 8 bit support is added.

BCH 4 & 8 bit error detection support is already available in mainline
kernel and works with software error correction.

This series is based on [1] and tested with RFC: OMAP GPMC bindings
patch series

1. linux-next/20121129

Tested on am335x-evm for BCH 4 and 8 bit error correction.

Changes since v1:
	- Erased page is identified by checking byte [13/7] in read
	  ecc. To filter out bit flips in OOB area, check 0 bits in
	  the byte greater than 4.
	- GPMC ecc engine configuration moves to omap2.c NAND driver.

Changes since v2:
	- Added runtime detection of elm module, instead of depending
	  on platform data.
	- Added bit flip correction in OOB ecc data if bit flip happen
	  OOB data.

Philip, Avinash (3):
  mtd: nand: omap2: Update nerrors using ecc.strength
  mtd: devices: elm: Add support for ELM error correction
  mtd: nand: omap2: Support for hardware BCH error correction.

 Documentation/devicetree/bindings/mtd/elm.txt |   17 +
 drivers/mtd/devices/Makefile                  |    4 +-
 drivers/mtd/devices/elm.c                     |  418 ++++++++++++++++++
 drivers/mtd/nand/omap2.c                      |  563 +++++++++++++++++++++++--
 include/linux/platform_data/elm.h             |   55 +++
 5 files changed, 1017 insertions(+), 41 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mtd/elm.txt
 create mode 100644 drivers/mtd/devices/elm.c
 create mode 100644 include/linux/platform_data/elm.h

^ permalink raw reply	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2012-12-12 11:15 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-11-29 11:46 [PATCH v3 0/3] mtd: nand: OMAP: ELM error correction support for BCH ecc Philip, Avinash
2012-11-29 11:46 ` [PATCH v3 1/3] mtd: nand: omap2: Update nerrors using ecc.strength Philip, Avinash
2012-12-05 12:03   ` Sekhar Nori
     [not found]     ` <50BF3819.9010200-l0cyMroinI0@public.gmane.org>
2012-12-05 12:43       ` Philip, Avinash
2012-12-07 10:40         ` Sekhar Nori
     [not found]           ` <50C1C784.4040209-l0cyMroinI0@public.gmane.org>
2012-12-10  6:44             ` Philip, Avinash
     [not found] ` <1354189595-12784-1-git-send-email-avinashphilip-l0cyMroinI0@public.gmane.org>
2012-11-29 11:46   ` [PATCH v3 2/3] mtd: devices: elm: Add support for ELM error correction Philip, Avinash
2012-12-07 10:37     ` Sekhar Nori
     [not found]       ` <50C1C6E3.5020300-l0cyMroinI0@public.gmane.org>
2012-12-10  6:43         ` Philip, Avinash
2012-12-12 11:15           ` Sekhar Nori
     [not found]     ` <1354189595-12784-3-git-send-email-avinashphilip-l0cyMroinI0@public.gmane.org>
2012-12-11  9:03       ` Grant Likely
2012-12-11 12:55         ` Philip, Avinash
2012-11-29 11:46 ` [PATCH v3 3/3] mtd: nand: omap2: Support for hardware BCH " Philip, Avinash

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