linux-kernel - Re: [PATCH 05/23] mtd: nand: jz4770: kill the ->ecc

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Date:	Tue, 8 Dec 2015 10:30:40 +0000
From:	Harvey Hunt <harvey.hunt@...tec.com>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	<linux-mtd@...ts.infradead.org>
CC:	Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	"Kukjin Kim" <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	<linux-samsung-soc@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Ralf Baechle <ralf@...ux-mips.org>,
	<linux-mips@...ux-mips.org>, Josh Wu <josh.wu@...el.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Chen-Yu Tsai <wens@...e.org>, <linux-sunxi@...glegroups.com>,
	Stefan Agner <stefan@...er.ch>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>,
	punnaiah choudary kalluri <punnaia@...inx.com>
Subject: Re: [PATCH 05/23] mtd: nand: jz4770: kill the ->ecc_layout field

Hi Boris,

On 07/12/15 22:26, Boris Brezillon wrote:
> ->ecc_layout is not used by any board file. Kill this field to avoid any
> confusion. New boards are encouraged to use the default ECC layout defined
> in NAND core.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> ---
>   arch/mips/include/asm/mach-jz4740/jz4740_nand.h | 2 --
>   drivers/mtd/nand/jz4740_nand.c                  | 3 ---
>   2 files changed, 5 deletions(-)
>
> diff --git a/arch/mips/include/asm/mach-jz4740/jz4740_nand.h b/arch/mips/include/asm/mach-jz4740/jz4740_nand.h
> index 79cff26..398733e 100644
> --- a/arch/mips/include/asm/mach-jz4740/jz4740_nand.h
> +++ b/arch/mips/include/asm/mach-jz4740/jz4740_nand.h
> @@ -25,8 +25,6 @@ struct jz_nand_platform_data {
>   	int			num_partitions;
>   	struct mtd_partition	*partitions;
>
> -	struct nand_ecclayout	*ecc_layout;
> -
>   	unsigned char banks[JZ_NAND_NUM_BANKS];
>
>   	void (*ident_callback)(struct platform_device *, struct nand_chip *,
> diff --git a/drivers/mtd/nand/jz4740_nand.c b/drivers/mtd/nand/jz4740_nand.c
> index 5a99a93..c4fe446 100644
> --- a/drivers/mtd/nand/jz4740_nand.c
> +++ b/drivers/mtd/nand/jz4740_nand.c
> @@ -446,9 +446,6 @@ static int jz_nand_probe(struct platform_device *pdev)
>   	chip->ecc.bytes		= 9;
>   	chip->ecc.strength	= 4;
>
> -	if (pdata)
> -		chip->ecc.layout = pdata->ecc_layout;
> -
>   	chip->chip_delay = 50;
>   	chip->cmd_ctrl = jz_nand_cmd_ctrl;
>   	chip->select_chip = jz_nand_select_chip;
>

Is there a typo in this commit title? The JZ4740 and JZ4770 have quite 
different NAND controller interfaces, so I don't think that the JZ4740 
driver will support the JZ4770.

Thanks,

Harvey
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