[PATCH v4 0/3] mtd: nand: OMAP: ELM error correction support for BCH ecc
avinashphilip at ti.com
Wed Jan 16 07:22:01 EST 2013
On Fri, Jan 04, 2013 at 13:26:48, Philip, Avinash wrote:
> 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 linux 3.8-rc2 and tested with .
> Also this patch series depend on  for NAND flash device
> tree data and gpmc nand device tree binding documentation updates.
> 1. [PATCH v7 0/5] OMAP GPMC DT bindings
> Tested on am335x-evm for BCH 4 and 8 bit error correction.
Can you apply this patch series on l2-mtd tree as it will help RBL compatibility
ecc layout for NAND flash in am335x-platforms and hardware based BCH error
> 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.
> Changes since v3:
> - Availability and usability of ELM module is detected from device
> tree nodes by checking availability of ELM node in device tree.
> 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 | 16 +
> .../devicetree/bindings/mtd/gpmc-nand.txt | 4 +
> drivers/mtd/devices/Makefile | 4 +-
> drivers/mtd/devices/elm.c | 405 ++++++++++++++
> drivers/mtd/nand/omap2.c | 583 ++++++++++++++++++--
> include/linux/platform_data/elm.h | 54 ++
> 6 files changed, 1023 insertions(+), 43 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
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