[U-Boot] [PATCH 4/9] dfu: mmc: add support for in-partition offset

[Lukasz Majewski]

On Wed, 07 Nov 2018 16:01:00 +0100
Marek Szyprowski <m.szyprowski at samsung.com> wrote:

> Add possibility to define a part of partition as a separate DFU
> entity. This allows to have more than one items on the given partiton.
> 
> The real use case for this option is TM2 board. It can use u-boot
> stored as Linux kernel on the defined partiton (as RAW data) and load
> the real kernel from the same partition, but stored under the certain
> offset.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> ---
>  drivers/dfu/dfu_mmc.c | 13 +++++++++++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c
> index b45e6dc54c..826e70ffec 100644
> --- a/drivers/dfu/dfu_mmc.c
> +++ b/drivers/dfu/dfu_mmc.c
> @@ -357,6 +357,7 @@ int dfu_fill_entity_mmc(struct dfu_entity *dfu,
> char *devstr, char *s) struct blk_desc *blk_dev =
> mmc_get_blk_desc(mmc); int mmcdev = second_arg;
>  		int mmcpart = third_arg;
> +		int offset = 0;
>  
>  		if (part_get_info(blk_dev, mmcpart, &partinfo) != 0)
> { pr_err("Couldn't find part #%d on mmc device #%d\n",
> @@ -364,9 +365,17 @@ int dfu_fill_entity_mmc(struct dfu_entity *dfu,
> char *devstr, char *s) return -ENODEV;
>  		}
>  
> +		/*
> +		 * Check for an extra entry at dfu_alt_info env
> variable
> +		 * specifying the mmc HW defined partition number
> +		 */
> +		if (s)
> +			if (!strcmp(strsep(&s, " "), "offset"))
> +				offset = simple_strtoul(s, NULL, 0);
> +
>  		dfu->layout			= DFU_RAW_ADDR;
> -		dfu->data.mmc.lba_start		=
> partinfo.start;
> -		dfu->data.mmc.lba_size		=
> partinfo.size;
> +		dfu->data.mmc.lba_start		=
> partinfo.start+offset;
> +		dfu->data.mmc.lba_size		=
> partinfo.size-offset; dfu->data.mmc.lba_blk_size	=
> partinfo.blksz; } else if (!strcmp(entity_type, "fat")) {
>  		dfu->layout = DFU_FS_FAT;

Acked-by: Lukasz Majewski <lukma at denx.de>


Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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