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SubjectRe: [PATCH v4 10/35] mtd: rawnand: jz4780: convert driver to nand_scan()
On Fri, 20 Jul 2018 17:15:02 +0200
Miquel Raynal <miquel.raynal@bootlin.com> wrote:

> Two helpers have been added to the core to make ECC-related
> configuration between the detection phase and the final NAND scan. Use
> these hooks and convert the driver to just use nand_scan() instead of
> both nand_scan_ident() and nand_scan_tail().
>
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Acked-by: Harvey Hunt <harveyhuntnexus@gmail.com>

Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>

> ---
> drivers/mtd/nand/raw/jz4780_nand.c | 34 ++++++++++++++++------------------
> 1 file changed, 16 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/jz4780_nand.c b/drivers/mtd/nand/raw/jz4780_nand.c
> index 49841dad347c..db4fa60bd52a 100644
> --- a/drivers/mtd/nand/raw/jz4780_nand.c
> +++ b/drivers/mtd/nand/raw/jz4780_nand.c
> @@ -158,9 +158,8 @@ static int jz4780_nand_ecc_correct(struct mtd_info *mtd, u8 *dat,
> return jz4780_bch_correct(nfc->bch, &params, dat, read_ecc);
> }
>
> -static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *dev)
> +static int jz4780_nand_attach_chip(struct nand_chip *chip)
> {
> - struct nand_chip *chip = &nand->chip;
> struct mtd_info *mtd = nand_to_mtd(chip);
> struct jz4780_nand_controller *nfc = to_jz4780_nand_controller(chip->controller);
> int eccbytes;
> @@ -171,7 +170,8 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
> switch (chip->ecc.mode) {
> case NAND_ECC_HW:
> if (!nfc->bch) {
> - dev_err(dev, "HW BCH selected, but BCH controller not found\n");
> + dev_err(nfc->dev,
> + "HW BCH selected, but BCH controller not found\n");
> return -ENODEV;
> }
>
> @@ -180,15 +180,16 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
> chip->ecc.correct = jz4780_nand_ecc_correct;
> /* fall through */
> case NAND_ECC_SOFT:
> - dev_info(dev, "using %s (strength %d, size %d, bytes %d)\n",
> - (nfc->bch) ? "hardware BCH" : "software ECC",
> - chip->ecc.strength, chip->ecc.size, chip->ecc.bytes);
> + dev_info(nfc->dev, "using %s (strength %d, size %d, bytes %d)\n",
> + (nfc->bch) ? "hardware BCH" : "software ECC",
> + chip->ecc.strength, chip->ecc.size, chip->ecc.bytes);
> break;
> case NAND_ECC_NONE:
> - dev_info(dev, "not using ECC\n");
> + dev_info(nfc->dev, "not using ECC\n");
> break;
> default:
> - dev_err(dev, "ECC mode %d not supported\n", chip->ecc.mode);
> + dev_err(nfc->dev, "ECC mode %d not supported\n",
> + chip->ecc.mode);
> return -EINVAL;
> }
>
> @@ -200,7 +201,7 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
> eccbytes = mtd->writesize / chip->ecc.size * chip->ecc.bytes;
>
> if (eccbytes > mtd->oobsize - 2) {
> - dev_err(dev,
> + dev_err(nfc->dev,
> "invalid ECC config: required %d ECC bytes, but only %d are available",
> eccbytes, mtd->oobsize - 2);
> return -EINVAL;
> @@ -211,6 +212,10 @@ static int jz4780_nand_init_ecc(struct jz4780_nand_chip *nand, struct device *de
> return 0;
> }
>
> +static const struct nand_controller_ops jz4780_nand_controller_ops = {
> + .attach_chip = jz4780_nand_attach_chip,
> +};
> +
> static int jz4780_nand_init_chip(struct platform_device *pdev,
> struct jz4780_nand_controller *nfc,
> struct device_node *np,
> @@ -280,15 +285,8 @@ static int jz4780_nand_init_chip(struct platform_device *pdev,
> chip->controller = &nfc->controller;
> nand_set_flash_node(chip, np);
>
> - ret = nand_scan_ident(mtd, 1, NULL);
> - if (ret)
> - return ret;
> -
> - ret = jz4780_nand_init_ecc(nand, dev);
> - if (ret)
> - return ret;
> -
> - ret = nand_scan_tail(mtd);
> + chip->controller->ops = &jz4780_nand_controller_ops;
> + ret = nand_scan(mtd, 1);
> if (ret)
> return ret;
>

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