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From: "Philip, Avinash" <avinashphilip@ti.com>
To: <dwmw2@infradead.org>, <artem.bityutskiy@linux.intel.com>,
	<afzal@ti.com>, <tony@atomide.com>,
	<broonie@opensource.wolfsonmicro.com>,
	<rmk+kernel@arm.linux.org.uk>, <gregkh@linuxfoundation.org>
Cc: <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
	<devicetree-discuss@lists.ozlabs.org>,
	<linux-doc@vger.kernel.org>, <nsekhar@ti.com>,
	<gururaja.hebbar@ti.com>, <ivan.djelic@parrot.com>,
	"Philip, Avinash" <avinashphilip@ti.com>
Subject: [PATCH v2 0/3] mtd: nand: OMAP: ELM error correction support for BCH ecc
Date: Wed, 31 Oct 2012 12:38:24 +0530	[thread overview]
Message-ID: <1351667307-447-1-git-send-email-avinashphilip@ti.com> (raw)

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/20121030

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.

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 |   18 +
 drivers/mtd/devices/Makefile                  |    4 +-
 drivers/mtd/devices/elm.c                     |  420 +++++++++++++++++++
 drivers/mtd/nand/omap2.c                      |  542 +++++++++++++++++++++++--
 include/linux/platform_data/elm.h             |   54 +++
 include/linux/platform_data/mtd-nand-omap2.h  |    1 +
 6 files changed, 997 insertions(+), 42 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


             reply	other threads:[~2012-10-31  7:24 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-31  7:08 Philip, Avinash [this message]
2012-10-31  7:08 ` [PATCH v2 1/3] mtd: nand: omap2: Update nerrors using ecc.strength Philip, Avinash
2012-10-31  7:08 ` [PATCH v2 2/3] mtd: devices: elm: Add support for ELM error correction Philip, Avinash
2012-10-31  7:08 ` [PATCH v2 3/3] mtd: nand: omap2: Support for hardware BCH " Philip, Avinash
2012-11-30 12:28   ` Artem Bityutskiy
2012-12-04 13:16     ` Philip, Avinash
2012-11-15 11:22 ` [PATCH v2 0/3] mtd: nand: OMAP: ELM error correction support for BCH ecc Artem Bityutskiy
2012-11-19 12:44   ` Philip, Avinash
2012-11-21  7:01   ` Philip, Avinash
2012-11-22 10:43     ` Artem Bityutskiy
2012-11-22 14:37       ` Philip, Avinash
2012-11-30 12:28         ` Artem Bityutskiy
2012-12-04 13:20           ` Philip, Avinash
2012-11-27  9:07       ` Philip, Avinash

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