[U-Boot] [PATCH v3 1/5] mtd: nand: omap: enable BCH ECC scheme using ELM for generic platform

[Tom Rini <trini@ti.com>]

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@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@ti.com>

-- 
Tom
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