[PATCH v4 2/4] ARM: OMAP2+: cleaned-up DT support of various ECC schemes
Gupta, Pekon
pekon at ti.com
Mon Jul 8 00:37:36 EDT 2013
>
> diff --git a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
> b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
> index 6a983c1..690070e 100644
> --- a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
> +++ b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt
> @@ -17,20 +17,42 @@ Required properties:
>
> Optional properties:
>
> - - nand-bus-width: Set this numeric value to 16 if the hardware
> - is wired that way. If not specified, a bus
> - width of 8 is assumed.
> + - nand-bus-width: Determines data-width of the connected
> device
> + x16 = "16"
> + x8 = "8" (default)
>
> - - ti,nand-ecc-opt: A string setting the ECC layout to use. One of:
>
> - "sw" Software method (default)
> - "hw" Hardware method
> - "hw-romcode" gpmc hamming mode method & romcode
> layout
> - "bch4" 4-bit BCH ecc code
> - "bch8" 8-bit BCH ecc code
> + - ti,nand-ecc-opt: Determines the ECC scheme used by driver.
> + It can be any of the following strings:
> +
> + "hamming_code_sw" 1-bit Hamming ECC
> + - ECC calculation in software
> + - Error detection in software
> +
> + "hamming_code_hw" 1-bit Hamming ECC
> + - ECC calculation in hardware
> + - Error detection in software
> +
> + "hamming_code_hw_romcode" 1-bit Hamming ECC
> + - ECC calculation in hardware
> + - Error detection in software
> + - ECC layout compatible to ROM code
> +
> + "bch8_hw_code_detection_sw" 8-bit BCH ECC
> + - ECC calculation in hardware
> + - Error detection in software
> + - depends on
> CONFIG_MTD_NAND_ECC_BCH
> +
> + "bch8_code_hw" 8-bit BCH ECC
> + - ECC calculation in hardware
> + - Error detection in hardware
> + - depends on
> CONFIG_MTD_NAND_OMAP_BCH
> + - requires <elm_id> to be specified
> +
> +
> + - elm_id: Specifies elm device node. This is required to
> + support some BCH ECC schemes mentioned
> above.
>
> - - elm_id: Specifies elm device node. This is required to support BCH
> - error correction using ELM module.
>
[Pekon] Requesting DT maintainers to please review the above
changes in values for 'nand-ecc-opt' property. And please ACK | NAK it.
with regards, pekon
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