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.szyprow...@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;
--
2.17.1
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