[PATCH v3 0/4] mtd:nand:omap2: clean-up of supported ECC schemes
Gupta, Pekon
pekon at ti.com
Thu Jun 27 13:50:33 EDT 2013
To OMAP3/4/5 and AM335x users,
Though I have tested the following series on AM335x-EVM,
but it would be good if it can also be tested on other platforms like
OMAP3/4/5 custom boards which use NAND.
This would be helpful, as this patch series provides base for further
enhancement and cleanup of omap2-nand driver.
with regards, pekon
> -----Original Message-----
> From: Gupta, Pekon
> Sent: Sunday, June 23, 2013 11:28 PM
> To: tony at atomide.com; artem.bityutskiy at linux.intel.com; Cousson, Benoit
> Cc: arnd at arndb.de; Philip, Avinash; Balbi, Felipe; linux-
> mtd at lists.infradead.org; linux-omap at vger.kernel.org;
> jp.francois at cynove.com; Gupta, Pekon
> Subject: [PATCH v3 0/4] mtd:nand:omap2: clean-up of supported ECC
> schemes
>
> (with Author Name fixed)
> Changes v2 -> v3
> - PATCH-1: re-arranged code to remove redundancy, added
> NAND_BUSWIDTH_AUTO
> - PATCH-2: updated nand-ecc-opt DT mapping and Documentation
> - PATCH-3: code-cleaning + changes to match PATCH-1
> - PATCH-4 <DROPPED> update DT attribute for ti,nand-ecc-opt
> - received feedback to keep DT mapping independent of linuxism
> - PATCH-4:<NEW> : ARM: dts: AM33xx: updated default ECC scheme in nand-
> ecc-opt
> - independent patch for AM335x-evm.dts update based on PATCH-2
>
> Changes v1 -> v2
> added [PATCH 3/4] and [PATCH 4/4]
>
> Patches in this series:
> [PATCH 1/4]: clean-up and optimization for supported ECC schemes.
> [PATCH 2/4]: add separate DT options each supported ECC scheme.
> [PATCH 3/4]: update BCH4 ECC implementation (using ELM or using lib/bch.h)
> [PATCH 4/4]: ARM: dts: AM33xx: updated default ECC scheme in nand-ecc-
> opt
>
> After this patch series, omap2-nand driver will supports following ECC
> schemes:
> +---------------------------------------+---------------+---------------+
> | ECC scheme |ECC calculation|Error detection|
> +---------------------------------------+---------------+---------------+
> |OMAP_ECC_HAMMING_CODE_DEFAULT |S/W |S/W
> |
> |OMAP_ECC_HAMMING_CODE_HW |H/W (GPMC) |S/W
> |
> |OMAP_ECC_HAMMING_CODE_HW_ROMCODE |H/W (GPMC) |S/W
> |
> +---------------------------------------+---------------+---------------+
> |OMAP_ECC_BCH4_CODE_HW_DETECTION_SW |H/W (GPMC) |S/W
> (lib/bch.h)|
> |OMAP_ECC_BCH4_CODE_HW |H/W (GPMC) |H/W (ELM)
> |
> +---------------------------------------+---------------+---------------+
> |OMAP_ECC_BCH8_CODE_HW_DETECTION_SW |H/W (GPMC) |S/W
> (lib/bch.h)|
> |OMAP_ECC_BCH8_CODE_HW |H/W (GPMC) |H/W (ELM)
> |
> +---------------------------------------+---------------+---------------+
> - Selection of OMAP_ECC_BCHx_CODE_HW_DETECTION_SW requires,
> Kconfig: CONFIG_MTD_NAND_ECC_BCH: enables S/W based BCH
> ECC algorithm.
>
> - Selection of OMAP_ECC_BCHx_CODE_HW requires,
> Kconfig: CONFIG_MTD_NAND_OMAP_BCH: enables ELM H/W
> module.
>
>
> Pekon Gupta (4):
> mtd:nand:omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in
> device_probe
> ARM: OMAP2+: cleaned-up DT support of various ECC schemes
> mtd:nand:omap2: updated support for BCH4 ECC scheme
> ARM: dts: AM33xx: updated default ECC scheme in nand-ecc-opt
>
> .../devicetree/bindings/mtd/gpmc-nand.txt | 65 ++-
> arch/arm/boot/dts/am335x-evm.dts | 2 +-
> arch/arm/mach-omap2/gpmc.c | 14 +-
> drivers/mtd/nand/Kconfig | 7 +-
> drivers/mtd/nand/omap2.c | 482 ++++++++++-----------
> include/linux/platform_data/elm.h | 4 +
> include/linux/platform_data/mtd-nand-omap2.h | 22 +-
> 7 files changed, 307 insertions(+), 289 deletions(-)
>
> --
> 1.8.1
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