[U-Boot] [PATCH v3 1/5] mtd: nand: omap: enable BCH ECC scheme using ELM for generic platform
Tom Rini
trini at ti.com
Thu Aug 29 17:01:55 CEST 2013
On Thu, Aug 29, 2013 at 04:26:41PM +0530, Pekon Gupta wrote:
> BCH8_ECC scheme implemented in omap_gpmc.c driver has following favours
> +-----------------------------------+-----------------+-----------------+
> |ECC Scheme | ECC Calculation | Error Detection |
> +-----------------------------------+-----------------+-----------------+
> |OMAP_ECC_BCH8_CODE_HW |GPMC |ELM H/W engine |
> |OMAP_ECC_BCH8_CODE_HW_DETECTION_SW |GPMC |S/W BCH library |
> +-----------------------------------+-----------------+-----------------+
>
> Current implementation limits the BCH8_CODE_HW only for AM33xx device family.
> (using CONFIG_AM33XX). However, other SoC families (like TI81xx) also have
> ELM hardware module, and can support ECC error detection using ELM.
>
> This patch
> - removes CONFIG_AM33xx
> Thus this driver can be reused by all devices having ELM h/w engine.
> - adds omap_select_ecc_scheme()
> A common function to handle ecc-scheme related configurations. This
> can be used both during device-probe and via user-space u-boot commads
> to change ecc-scheme.
> - adds CONFIG_BCH
> S/W library (lib/bch.c) required by OMAP_ECC_BCH8_CODE_HW_DETECTION_SW
> is enabled by CONFIG_BCH.
> - adds CONFIG_SYS_NAND_ECCSCHEME (new)
> user specified CONFIG to determine ecc-scheme used during boot
> - adds CONFIG_SYS_NAND_ONFI_DETECTION
> enable auto-detection of ONFI compliant devices
>
> Signed-off-by: Pekon Gupta <pekon at ti.com>
> ---
> arch/arm/include/asm/arch-am33xx/omap_gpmc.h | 48 +----
> doc/README.nand | 13 ++
> drivers/mtd/nand/omap_gpmc.c | 291 ++++++++++++++++-----------
> include/configs/am335x_evm.h | 2 +
> 4 files changed, 195 insertions(+), 159 deletions(-)
For the am33xx related parts:
Reviewed-by: Tom Rini <trini at ti.com>
--
Tom
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