linux-kernel - Re: [PATCH v4 48/52] mtd: nand: vf610: switch to mtd_ooblayout

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Message-ID: <73e28b049f14566167c1b6cd3c329099@agner.ch>
Date:	Mon, 07 Mar 2016 10:04:36 -0800
From:	Stefan Agner <stefan@...er.ch>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	linux-mtd@...ts.infradead.org, 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,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Wenyou Yang <wenyou.yang@...el.com>,
	Josh Wu <rainyfeeling@...look.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,
	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>,
	Priit Laes <plaes@...es.org>,
	Kamal Dasu <kdasu.kdev@...il.com>,
	bcm-kernel-feedback-list@...adcom.com, linux-api@...r.kernel.org,
	Harvey Hunt <harvey.hunt@...tec.com>
Subject: Re: [PATCH v4 48/52] mtd: nand: vf610: switch to mtd_ooblayout_ops

On 2016-03-07 01:47, Boris Brezillon wrote:
> Implementing the mtd_ooblayout_ops interface is the new way of exposing
> ECC/OOB layout to MTD users.

Hi Boris,

Tested this revision, works out of the box now!

Thanks!

Tested-by: Stefan Agner <stefan@...er.ch>
Acked-by: Stefan Agner <stefan@...er.ch>

--
Stefan

> 
> Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> ---
>  drivers/mtd/nand/vf610_nfc.c | 34 ++++------------------------------
>  1 file changed, 4 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/mtd/nand/vf610_nfc.c b/drivers/mtd/nand/vf610_nfc.c
> index 293feb1..da34de1 100644
> --- a/drivers/mtd/nand/vf610_nfc.c
> +++ b/drivers/mtd/nand/vf610_nfc.c
> @@ -175,34 +175,6 @@ static inline struct vf610_nfc *mtd_to_nfc(struct
> mtd_info *mtd)
>  	return container_of(mtd_to_nand(mtd), struct vf610_nfc, chip);
>  }
>  
> -static struct nand_ecclayout vf610_nfc_ecc45 = {
> -	.eccbytes = 45,
> -	.eccpos = {19, 20, 21, 22, 23,
> -		   24, 25, 26, 27, 28, 29, 30, 31,
> -		   32, 33, 34, 35, 36, 37, 38, 39,
> -		   40, 41, 42, 43, 44, 45, 46, 47,
> -		   48, 49, 50, 51, 52, 53, 54, 55,
> -		   56, 57, 58, 59, 60, 61, 62, 63},
> -	.oobfree = {
> -		{.offset = 2,
> -		 .length = 17} }
> -};
> -
> -static struct nand_ecclayout vf610_nfc_ecc60 = {
> -	.eccbytes = 60,
> -	.eccpos = { 4,  5,  6,  7,  8,  9, 10, 11,
> -		   12, 13, 14, 15, 16, 17, 18, 19,
> -		   20, 21, 22, 23, 24, 25, 26, 27,
> -		   28, 29, 30, 31, 32, 33, 34, 35,
> -		   36, 37, 38, 39, 40, 41, 42, 43,
> -		   44, 45, 46, 47, 48, 49, 50, 51,
> -		   52, 53, 54, 55, 56, 57, 58, 59,
> -		   60, 61, 62, 63 },
> -	.oobfree = {
> -		{.offset = 2,
> -		 .length = 2} }
> -};
> -
>  static inline u32 vf610_nfc_read(struct vf610_nfc *nfc, uint reg)
>  {
>  	return readl(nfc->regs + reg);
> @@ -781,14 +753,16 @@ static int vf610_nfc_probe(struct platform_device *pdev)
>  		if (mtd->oobsize > 64)
>  			mtd->oobsize = 64;
>  
> +		/*
> +		 * mtd->ecclayout is not specified here because we're using the
> +		 * default large page ECC layout defined in NAND core.
> +		 */
>  		if (chip->ecc.strength == 32) {
>  			nfc->ecc_mode = ECC_60_BYTE;
>  			chip->ecc.bytes = 60;
> -			chip->ecc.layout = &vf610_nfc_ecc60;
>  		} else if (chip->ecc.strength == 24) {
>  			nfc->ecc_mode = ECC_45_BYTE;
>  			chip->ecc.bytes = 45;
> -			chip->ecc.layout = &vf610_nfc_ecc45;
>  		} else {
>  			dev_err(nfc->dev, "Unsupported ECC strength\n");
>  			err = -ENXIO;