Add possibility to define a part of partition as a separate DFU entity. This allows to have more than one items on the given partition.

The real use case for this option is TM2 board. It can use u-boot stored as Linux kernel on the defined partition (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@samsung.com Acked-by: Lukasz Majewski lukma@denx.de --- Changelog: - fixed minor coding style issue - made it a stand alone patch, independent from the main patchset: https://patchwork.ozlabs.org/cover/994309/ --- 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 403fd5351d..5b551f6ae1 100644 --- a/drivers/dfu/dfu_mmc.c +++ b/drivers/dfu/dfu_mmc.c @@ -352,6 +352,7 @@ 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", @@ -359,9 +360,17 @@ 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;