Hi Artem, 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 [1]. > Also this patch series depend on [1] for NAND flash device > tree data and gpmc nand device tree binding documentation updates. > > 1. [PATCH v7 0/5] OMAP GPMC DT bindings > http://www.spinics.net/lists/linux-omap/msg83505.html > > 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 correction. Thanks Avinash > > 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 > > -- > 1.7.9.5 > > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
