On Tue, 3 Jul 2018 23:59:59 +0200
Miquel Raynal <miquel.ray...@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.ray...@bootlin.com>
> ---
> drivers/mtd/nand/raw/brcmnand/brcmnand.c | 43
> ++++++++++++++++++--------------
> 1 file changed, 24 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> index 1306aaa7a8bf..99ab7b93756c 100644
> --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> @@ -2208,6 +2208,28 @@ static int brcmnand_setup_dev(struct brcmnand_host
> *host)
> return 0;
> }
>
> +static int brcmnand_attach_chip(struct nand_chip *chip)
> +{
> + struct mtd_info *mtd = nand_to_mtd(chip);
> + struct brcmnand_host *host = nand_get_controller_data(chip);
> + int ret;
> +
> + if (chip->bbt_options & NAND_BBT_USE_FLASH)
> + chip->bbt_options |= NAND_BBT_NO_OOB;
> +
> + if (brcmnand_setup_dev(host))
> + return -ENXIO;
> +
> + chip->ecc.size = host->hwcfg.sector_size_1k ? 1024 : 512;
> +
> + /* only use our internal HW threshold */
> + mtd->bitflip_threshold = 1;
> +
> + ret = brcmstb_choose_ecc_layout(host);
> +
> + return ret;
> +}
> +
> static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node
> *dn)
> {
> struct brcmnand_controller *ctrl = host->ctrl;
> @@ -2267,10 +2289,6 @@ static int brcmnand_init_cs(struct brcmnand_host
> *host, struct device_node *dn)
> nand_writereg(ctrl, cfg_offs,
> nand_readreg(ctrl, cfg_offs) & ~CFG_BUS_WIDTH);
>
> - ret = nand_scan_ident(mtd, 1, NULL);
> - if (ret)
> - return ret;
> -
> chip->options |= NAND_NO_SUBPAGE_WRITE;
> /*
> * Avoid (for instance) kmap()'d buffers from JFFS2, which we can't DMA
> @@ -2279,21 +2297,8 @@ static int brcmnand_init_cs(struct brcmnand_host
> *host, struct device_node *dn)
> */
> chip->options |= NAND_USE_BOUNCE_BUFFER;
>
> - if (chip->bbt_options & NAND_BBT_USE_FLASH)
> - chip->bbt_options |= NAND_BBT_NO_OOB;
> -
> - if (brcmnand_setup_dev(host))
> - return -ENXIO;
> -
> - chip->ecc.size = host->hwcfg.sector_size_1k ? 1024 : 512;
> - /* only use our internal HW threshold */
> - mtd->bitflip_threshold = 1;
> -
> - ret = brcmstb_choose_ecc_layout(host);
> - if (ret)
> - return ret;
> -
> - ret = nand_scan_tail(mtd);
> + chip->controller->attach_chip = brcmnand_attach_chip;
Hm, this assignment should be done once, when initializing the
controller (in brcmnand_probe()), not every time you add a NAND chip.
> + ret = nand_scan(mtd, 1);
> if (ret)
> return ret;
>
