[RFC PATCH] dfu: add DFU_SKIP layout concept

[Lukasz Majewski]

Hi Jaehoon,

> Add DFU_SKIP layout cencept.
> If layout is "skip", it will be skipped after nothing to do.
> It's useful to support multiple board with one tar file.
> 
> Signed-off-by: Jaehoon Chung <jh80.chung at samsung.com>
> ---
>  drivers/dfu/dfu.c     | 2 +-
>  drivers/dfu/dfu_mmc.c | 9 +++++++++
>  include/dfu.h         | 1 +
>  3 files changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
> index a298c2c43999..f679f1fa5fe5 100644
> --- a/drivers/dfu/dfu.c
> +++ b/drivers/dfu/dfu.c
> @@ -614,7 +614,7 @@ const char *dfu_get_dev_type(enum dfu_device_type
> t) const char *dfu_get_layout(enum dfu_layout l)
>  {
>  	const char *const dfu_layout[] = {NULL, "RAW_ADDR", "FAT",
> "EXT2",
> -					  "EXT3", "EXT4", "RAM_ADDR"
> };
> +					  "EXT3", "EXT4",
> "RAM_ADDR", "SKIP" }; return dfu_layout[l];
>  }
>  
> diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c
> index 691d01c7ebdf..c7c324b0a986 100644
> --- a/drivers/dfu/dfu_mmc.c
> +++ b/drivers/dfu/dfu_mmc.c
> @@ -108,6 +108,8 @@ static int mmc_file_op(enum dfu_op op, struct
> dfu_entity *dfu, case DFU_FS_EXT4:
>  		fstype = FS_TYPE_EXT;
>  		break;
> +	case DFU_SKIP:
> +		return 0;
>  	default:
>  		printf("%s: Layout (%s) not (yet) supported!\n",
> __func__, dfu_get_layout(dfu->layout));
> @@ -204,6 +206,9 @@ int dfu_write_medium_mmc(struct dfu_entity *dfu,
>  	case DFU_FS_EXT4:
>  		ret = mmc_file_buf_write(dfu, offset, buf, len);
>  		break;
> +	case DFU_SKIP:
> +		ret = 0;
> +		break;
>  	default:
>  		printf("%s: Layout (%s) not (yet) supported!\n",
> __func__, dfu_get_layout(dfu->layout));
> @@ -238,6 +243,8 @@ int dfu_get_medium_size_mmc(struct dfu_entity
> *dfu, u64 *size) if (ret < 0)
>  			return ret;
>  		return 0;
> +	case DFU_SKIP:
> +		return 0;
>  	default:
>  		printf("%s: Layout (%s) not (yet) supported!\n",
> __func__, dfu_get_layout(dfu->layout));
> @@ -399,6 +406,8 @@ int dfu_fill_entity_mmc(struct dfu_entity *dfu,
> char *devstr, char *s) dfu->layout = DFU_FS_FAT;
>  	} else if (!strcmp(entity_type, "ext4")) {
>  		dfu->layout = DFU_FS_EXT4;
> +	} else if (!strcmp(entity_type, "skip")) {
> +		dfu->layout = DFU_SKIP;
>  	} else {
>  		pr_err("Memory layout (%s) not supported!\n",
> entity_type); return -ENODEV;
> diff --git a/include/dfu.h b/include/dfu.h
> index 84abdc79acd1..2e8276c69c9f 100644
> --- a/include/dfu.h
> +++ b/include/dfu.h
> @@ -33,6 +33,7 @@ enum dfu_layout {
>  	DFU_FS_EXT3,
>  	DFU_FS_EXT4,
>  	DFU_RAM_ADDR,
> +	DFU_SKIP,
>  };
>  
>  enum dfu_op {

Fine for me. Please add a verbose description to doc/DFU.readme with
some examples (i.e. which target board and how you plan to use this
feature).


Best regards,

Lukasz Majewski

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