Re: [PATCH] mtd: spinand: micron: add support for MT29F1G01AAADD

From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Marco Felsch <m.felsch@pengutronix.de>
Cc: bbrezillon@kernel.org, richard@nod.at,
	frieder.schrempf@kontron.de, marek.vasut@gmail.com,
	linux-mtd@lists.infradead.org, kernel@pengutronix.de,
	Peter Pan <peterpandong@micron.com>
Subject: Re: [PATCH] mtd: spinand: micron: add support for MT29F1G01AAADD
Date: Mon, 19 Aug 2019 10:17:18 +0200	[thread overview]
Message-ID: <20190819101718.39b3a5ca@xps13> (raw)
In-Reply-To: <20190814082232.2119-1-m.felsch@pengutronix.de>

Hi Marco,

Marco Felsch <m.felsch@pengutronix.de> wrote on Wed, 14 Aug 2019
10:22:32 +0200:

> The MT29F1G01AAADD is a single die, SLC based SPI NAND. It has a
> capacity of 1Gb and supports 4-bit ECC. The datasheet can be found [1].
> 
> Unfortunatly the linked device is marked as EoL, but I will expect that
> the MT29F1G01AAADDH4-ITX behaves the same way.
> 
> [1] https://datasheet.octopart.com/ \
>       MT29F1G01AAADDH4-IT:D-Micron-datasheet-11572380.pdf
> 
> Cc: Peter Pan <peterpandong@micron.com>
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> ---
>  drivers/mtd/nand/spi/micron.c | 68 +++++++++++++++++++++++++++++++++++
>  1 file changed, 68 insertions(+)
> 
> diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c
> index 7d7b1f7fcf71..9d63450afc69 100644
> --- a/drivers/mtd/nand/spi/micron.c
> +++ b/drivers/mtd/nand/spi/micron.c
> @@ -34,6 +34,18 @@ static SPINAND_OP_VARIANTS(update_cache_variants,
>  		SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
>  		SPINAND_PROG_LOAD(false, 0, NULL, 0));
>  
> +static SPINAND_OP_VARIANTS(read_cache_variants_mt29f1g01aaadd,
> +		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
> +		SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
> +		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
> +		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
> +
> +static SPINAND_OP_VARIANTS(write_cache_variants_mt29f1g01aaadd,
> +		SPINAND_PROG_LOAD(true, 0, NULL, 0));
> +
> +static SPINAND_OP_VARIANTS(update_cache_variants_mt29f1g01aaadd,
> +		SPINAND_PROG_LOAD(false, 0, NULL, 0));
> +
>  static int mt29f2g01abagd_ooblayout_ecc(struct mtd_info *mtd, int section,
>  					struct mtd_oob_region *region)
>  {
> @@ -90,6 +102,52 @@ static int mt29f2g01abagd_ecc_get_status(struct spinand_device *spinand,
>  	return -EINVAL;
>  }
>  
> +static int mt29f1g01aaadd_ooblayout_ecc(struct mtd_info *mtd, int section,
> +					struct mtd_oob_region *region)
> +{
> +	if (section > 3)
> +		return -ERANGE;
> +
> +	region->offset = (section * 0x10) + 8;

Any reason to use hex here?         ^

If not I would prefer decimal numbers.

Otherwise looks fine.

Thanks,
Miquèl

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