linux-kernel - Re: [PATCH v3 2/4] mtd: rawnand: add manufacturer fixup for ONFI parameter page

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Date:   Wed, 20 Jun 2018 09:49:06 +0200
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     miquel.raynal@...tlin.com, dwmw2@...radead.org,
        computersforpeace@...il.com, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at>,
        Marek Vasut <marek.vasut@...il.com>
Subject: Re: [PATCH v3 2/4] mtd: rawnand: add manufacturer fixup for ONFI
 parameter page

On Wed, 20 Jun 2018 17:05:42 +1200
Chris Packham <chris.packham@...iedtelesis.co.nz> wrote:

> This is called after the ONFI parameter page checksum is verified
> and allows us to override the contents of the parameter page.
> 
> Suggested-by: Boris Brezillon <boris.brezillon@...tlin.com>
> Reviewed-by: Boris Brezillon <boris.brezillon@...tlin.com>

Ditto.

> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> ---
> Changes in v2:
> - New
> Changes in v3:
> - Add doc comment and review from Boris
> 
>  drivers/mtd/nand/raw/nand_base.c | 4 ++++
>  include/linux/mtd/rawnand.h      | 3 +++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 0cd3e216b95c..65250308c82d 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -5172,6 +5172,10 @@ static int nand_flash_detect_onfi(struct nand_chip *chip)
>  		}
>  	}
>  
> +	if (chip->manufacturer.desc && chip->manufacturer.desc->ops &&
> +	    chip->manufacturer.desc->ops->fixup_onfi_param_page)
> +		chip->manufacturer.desc->ops->fixup_onfi_param_page(chip, p);
> +
>  	/* Check version */
>  	val = le16_to_cpu(p->revision);
>  	if (val & (1 << 5))
> diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
> index 3e8ec3b8a39c..ef7e3b4e91ea 100644
> --- a/include/linux/mtd/rawnand.h
> +++ b/include/linux/mtd/rawnand.h
> @@ -778,11 +778,14 @@ nand_get_sdr_timings(const struct nand_data_interface *conf)
>   *	  implementation) if any.
>   * @cleanup: the ->init() function may have allocated resources, ->cleanup()
>   *	     is here to let vendor specific code release those resources.
> + * @fixup_onfi_param_page: apply vendor specific fixups to the ONFI
> + *	parameter page. This is called after the checksum is verified.

Can you align the second line on the colon?

>   */
>  struct nand_manufacturer_ops {
>  	void (*detect)(struct nand_chip *chip);
>  	int (*init)(struct nand_chip *chip);
>  	void (*cleanup)(struct nand_chip *chip);
> +	void (*fixup_onfi_param_page)(struct nand_chip *chip, struct nand_onfi_params *p);
>  };
>  
>  /**