[PATCH v2] mtd: rawnand: add a way to pass an ID table with nand_scan()

[Boris Brezillon]

On Sun, 22 Apr 2018 18:02:30 +0200
Miquel Raynal <miquel.raynal at bootlin.com> wrote:

> As part of the work of migrating all the drivers to nand_scan(), and
> because nand_scan() does not provide a way to pass an ID table, rename
> the function nand_scan_with_ids() and add a third parameter to give a
> flash ID table (like what was done with nand_scan_ident()).
> 
> Create a nand_scan() helper that is just a wrapper of
> nand_scan_with_ids(), passing NULL as the ID table. This way a
> controller drivers can continue using nand_scan() transparently.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
> ---
> 
> Changes since v1:
> =================
>  * Removed the ID table from nand_chip structure and created a
>    nand_scan_with_ids() function called by nand_scan().
>  * No need to apply any change to the sm_common.c driver, switching
>    from nand_scan() to nand_scan_with_ids() will be done in a future
>    series.
> 
> 
>  drivers/mtd/nand/raw/nand_base.c | 8 +++++---
>  include/linux/mtd/rawnand.h      | 9 ++++++++-
>  2 files changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 72f3a89da513..15d6c6e2b77a 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -6630,19 +6630,21 @@ EXPORT_SYMBOL(nand_scan_tail);
>  #endif
>  
>  /**
> - * nand_scan - [NAND Interface] Scan for the NAND device
> + * nand_scan_with_ids - [NAND Interface] Scan for the NAND device
>   * @mtd: MTD device structure
>   * @maxchips: number of chips to scan for
> + * @ids: optional flash IDs table
>   *
>   * This fills out all the uninitialized function pointers with the defaults.
>   * The flash ID is read and the mtd/chip structures are filled with the
>   * appropriate values.
>   */
> -int nand_scan(struct mtd_info *mtd, int maxchips)
> +int nand_scan_with_ids(struct mtd_info *mtd, int maxchips,
> +		       struct nand_flash_dev *ids)
>  {
>  	int ret;
>  
> -	ret = nand_scan_ident(mtd, maxchips, NULL);
> +	ret = nand_scan_ident(mtd, maxchips, ids);
>  	if (!ret)
>  		ret = nand_scan_tail(mtd);
>  	return ret;

You forgot to change the name of the exported symbol. No need to send a
new version, I'll fix it when applying.

> diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
> index 5dad59b31244..ba8d908f5cc7 100644
> --- a/include/linux/mtd/rawnand.h
> +++ b/include/linux/mtd/rawnand.h
> @@ -28,7 +28,14 @@ struct nand_flash_dev;
>  struct device_node;
>  
>  /* Scan and identify a NAND device */
> -int nand_scan(struct mtd_info *mtd, int max_chips);
> +int nand_scan_with_ids(struct mtd_info *mtd, int max_chips,
> +		       struct nand_flash_dev *ids);
> +
> +static inline int nand_scan(struct mtd_info *mtd, int max_chips)
> +{
> +	return nand_scan_with_ids(mtd, max_chips, NULL);
> +}
> +
>  /*
>   * Separate phases of nand_scan(), allowing board driver to intervene
>   * and override command or ECC setup according to flash type.