[RFC PATCH] dfu: add DFU_SKIP layout concept

[Jaehoon Chung]

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.ch...@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 {
-- 
2.29.0