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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
