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From: Heiko Schocher <hs@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2 3/4] mtd: nand: mxs: Add comment for calculating ECC strength
Date: Tue, 14 Apr 2015 08:12:53 +0200	[thread overview]
Message-ID: <552CAFE5.409@denx.de> (raw)
In-Reply-To: <1428956274-18362-4-git-send-email-joerg.krause@embedded.rocks>

Hello J?rg,

Am 13.04.2015 22:17, schrieb J?rg Krause:
> Signed-off-by: J?rg Krause <joerg.krause@embedded.rocks>
> ---
>   drivers/mtd/nand/mxs_nand.c | 7 +++++++
>   1 file changed, 7 insertions(+)

nitpick only ...

> diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c
> index 912fed8..76e47ab 100644
> --- a/drivers/mtd/nand/mxs_nand.c
> +++ b/drivers/mtd/nand/mxs_nand.c
> @@ -148,6 +148,13 @@ static inline uint32_t mxs_nand_get_ecc_strength(uint32_t page_data_size,
>   {
>   	int ecc_strength;
>
> +	/* Determine the ECC layout with the formula:

wrong comment style ... please fix also in patch 4/4... thanks.

bye,
Heiko
> +	 * 	ECC bits per chunk = (total page spare data bits) /
> +	 * 		(bits per ECC level) / (chunks per page)
> +	 * where:
> +	 * 	total page spare data bits =
> +	 * 		(page oob size - meta data size) * (bits per byte)
> +	 */
>   	ecc_strength = ((page_oob_size - MXS_NAND_METADATA_SIZE) * 8)
>   			/ (MXS_NAND_BITS_PER_ECC_LEVEL *
>   				mxs_nand_ecc_chunk_cnt(page_data_size));
>

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

  reply	other threads:[~2015-04-14  6:12 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-13 20:17 [U-Boot] [PATCH v2 0/4] mtd: nand: mxs: Calculate ECC strength dynamically Jörg Krause
2015-04-13 20:17 ` [U-Boot] [PATCH v2 1/4] mtd:mxs:nand calculate ecc " Jörg Krause
2015-04-13 20:17 ` [U-Boot] [PATCH v2 2/4] mtd: nand: mxs: Replace magic number for bits per ECC level with macro Jörg Krause
2015-04-13 20:17 ` [U-Boot] [PATCH v2 3/4] mtd: nand: mxs: Add comment for calculating ECC strength Jörg Krause
2015-04-14  6:12   ` Heiko Schocher [this message]
2015-04-14  6:29     ` Jörg Krause
2015-04-14  8:02       ` Heiko Schocher
2015-04-14 15:32         ` Jörg Krause
2015-04-15  5:39           ` Heiko Schocher
2015-04-13 20:17 ` [U-Boot] [PATCH v2 4/4] tools: mxsboot: Calculate ECC strength dynamically Jörg Krause
2015-04-14  6:11 ` [U-Boot] [PATCH v2 0/4] mtd: nand: mxs: " Heiko Schocher

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