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SubjectRe: [PATCH v4 09/35] mtd: rawnand: hisi504: convert driver to nand_scan()
On Fri, 20 Jul 2018 17:15:01 +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>

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

> ---
> drivers/mtd/nand/raw/hisi504_nand.c | 78 +++++++++++++++++++++----------------
> 1 file changed, 44 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/hisi504_nand.c b/drivers/mtd/nand/raw/hisi504_nand.c
> index a1e009c8e556..950dc7789296 100644
> --- a/drivers/mtd/nand/raw/hisi504_nand.c
> +++ b/drivers/mtd/nand/raw/hisi504_nand.c
> @@ -709,9 +709,50 @@ static int hisi_nfc_ecc_probe(struct hinfc_host *host)
> return 0;
> }
>
> +static int hisi_nfc_attach_chip(struct nand_chip *chip)
> +{
> + struct mtd_info *mtd = nand_to_mtd(chip);
> + struct hinfc_host *host = nand_get_controller_data(chip);
> + int flag;
> +
> + host->buffer = dmam_alloc_coherent(host->dev,
> + mtd->writesize + mtd->oobsize,
> + &host->dma_buffer, GFP_KERNEL);
> + if (!host->buffer)
> + return -ENOMEM;
> +
> + host->dma_oob = host->dma_buffer + mtd->writesize;
> + memset(host->buffer, 0xff, mtd->writesize + mtd->oobsize);
> +
> + flag = hinfc_read(host, HINFC504_CON);
> + flag &= ~(HINFC504_CON_PAGESIZE_MASK << HINFC504_CON_PAGEISZE_SHIFT);
> + switch (mtd->writesize) {
> + case 2048:
> + flag |= (0x001 << HINFC504_CON_PAGEISZE_SHIFT);
> + break;
> + /*
> + * TODO: add more pagesize support,
> + * default pagesize has been set in hisi_nfc_host_init
> + */
> + default:
> + dev_err(host->dev, "NON-2KB page size nand flash\n");
> + return -EINVAL;

We should probably return ENOTSUPP, but that's not related to the
change you do, so let's keep that for later.

> + }
> + hinfc_write(host, flag, HINFC504_CON);
> +
> + if (chip->ecc.mode == NAND_ECC_HW)
> + hisi_nfc_ecc_probe(host);
> +
> + return 0;
> +}
> +
> +static const struct nand_controller_ops hisi_nfc_controller_ops = {
> + .attach_chip = hisi_nfc_attach_chip,
> +};
> +
> static int hisi_nfc_probe(struct platform_device *pdev)
> {
> - int ret = 0, irq, flag, max_chips = HINFC504_MAX_CHIP;
> + int ret = 0, irq, max_chips = HINFC504_MAX_CHIP;
> struct device *dev = &pdev->dev;
> struct hinfc_host *host;
> struct nand_chip *chip;
> @@ -769,42 +810,11 @@ static int hisi_nfc_probe(struct platform_device *pdev)
> return ret;
> }
>
> - ret = nand_scan_ident(mtd, max_chips, NULL);
> + chip->dummy_controller.ops = &hisi_nfc_controller_ops;
> + ret = nand_scan(mtd, max_chips);
> if (ret)
> return ret;
>
> - host->buffer = dmam_alloc_coherent(dev, mtd->writesize + mtd->oobsize,
> - &host->dma_buffer, GFP_KERNEL);
> - if (!host->buffer)
> - return -ENOMEM;
> -
> - host->dma_oob = host->dma_buffer + mtd->writesize;
> - memset(host->buffer, 0xff, mtd->writesize + mtd->oobsize);
> -
> - flag = hinfc_read(host, HINFC504_CON);
> - flag &= ~(HINFC504_CON_PAGESIZE_MASK << HINFC504_CON_PAGEISZE_SHIFT);
> - switch (mtd->writesize) {
> - case 2048:
> - flag |= (0x001 << HINFC504_CON_PAGEISZE_SHIFT); break;
> - /*
> - * TODO: add more pagesize support,
> - * default pagesize has been set in hisi_nfc_host_init
> - */
> - default:
> - dev_err(dev, "NON-2KB page size nand flash\n");
> - return -EINVAL;
> - }
> - hinfc_write(host, flag, HINFC504_CON);
> -
> - if (chip->ecc.mode == NAND_ECC_HW)
> - hisi_nfc_ecc_probe(host);
> -
> - ret = nand_scan_tail(mtd);
> - if (ret) {
> - dev_err(dev, "nand_scan_tail failed: %d\n", ret);
> - return ret;
> - }
> -
> ret = mtd_device_register(mtd, NULL, 0);
> if (ret) {
> dev_err(dev, "Err MTD partition=%d\n", ret);

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