[U-Boot] [RFC 03/11] mtd/nand: support ONFI timing mode retrieval for non-ONFI

[Boris Brezillon <boris.brezillon@free-electrons.com>]

On Fri,  5 Jun 2015 13:52:36 +0200
Roy Spliet <r.spliet@ultimaker.com> wrote:

That one has been accepted, so I guess it will be taken by Scott during
his sync with the last mainline kernel.

> From: yassin <yassinjaffer@gmail.com>
> 
> Signed-off-by: Roy Spliet <r.spliet@ultimaker.com>
> ---
>  drivers/mtd/nand/nand_base.c | 1 +
>  include/linux/mtd/nand.h     | 7 +++++++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
> index c0e381a..dbeb092 100644
> --- a/drivers/mtd/nand/nand_base.c
> +++ b/drivers/mtd/nand/nand_base.c
> @@ -3709,6 +3709,7 @@ static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip,
>  		chip->options |= type->options;
>  		chip->ecc_strength_ds = NAND_ECC_STRENGTH(type);
>  		chip->ecc_step_ds = NAND_ECC_STEP(type);
> +		chip->onfi_timing_mode_ds = type->onfi_timing_mode_ds;
>  
>  		*busw = type->options & NAND_BUSWIDTH_16;
>  
> diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
> index abda5c3..0cdb3b9 100644
> --- a/include/linux/mtd/nand.h
> +++ b/include/linux/mtd/nand.h
> @@ -634,6 +634,7 @@ struct nand_buffers {
>   * @ecc_step_ds:	[INTERN] ECC step required by the @ecc_strength_ds,
>   *                      also from the datasheet. It is the recommended ECC step
>   *			size, if known; if unknown, set to zero.
> + * @onfi_timing_mode_ds:[INTERN] ONFI timing mode deduced from datasheet.
>   * @numchips:		[INTERN] number of physical chips
>   * @chipsize:		[INTERN] the size of one chip for multichip arrays
>   * @pagemask:		[INTERN] page number mask = number of (pages / chip) - 1
> @@ -718,6 +719,7 @@ struct nand_chip {
>  	uint8_t bits_per_cell;
>  	uint16_t ecc_strength_ds;
>  	uint16_t ecc_step_ds;
> +	int onfi_timing_mode_ds;
>  	int badblockpos;
>  	int badblockbits;
>  
> @@ -822,6 +824,10 @@ struct nand_chip {
>   *               @ecc_step_ds in nand_chip{}, also from the datasheet.
>   *               For example, the "4bit ECC for each 512Byte" can be set with
>   *               NAND_ECC_INFO(4, 512).
> + * @onfi_timing_mode_ds: the ONFI timing mode supported by this NAND chip. This
> + *                       should be deduced from timings described in the
> + *                       datasheet.
> + *
>   */
>  struct nand_flash_dev {
>  	char *name;
> @@ -842,6 +848,7 @@ struct nand_flash_dev {
>  		uint16_t strength_ds;
>  		uint16_t step_ds;
>  	} ecc;
> +	int onfi_timing_mode_ds;
>  };
>  
>  /**



-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com