[RFC 09/22] dm: blk: add a device-probe hook for scanning disk partitions

[AKASHI Takahiro]

Now that all the block device drivers have enable a probe hook, we will
call blk_create_partitions() to enumerate all the partitions and create
associated udevices when a block device is detected.

Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
---
 drivers/block/blk-uclass.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c
index dd7f3c0fe31e..6ba11a8fa7f7 100644
--- a/drivers/block/blk-uclass.c
+++ b/drivers/block/blk-uclass.c
@@ -741,11 +741,25 @@ static int blk_post_probe(struct udevice *dev)
                struct blk_desc *desc = dev_get_uclass_plat(dev);
 
                part_init(desc);
+
+               if (desc->part_type != PART_TYPE_UNKNOWN &&
+                   blk_create_partitions(dev))
+                       debug("*** creating partitions failed\n");
        }
 
        return 0;
 }
 
+static int blk_part_post_probe(struct udevice *dev)
+{
+       /*
+        * TODO:
+        * If we call blk_creat_partitions() here, it would allow for
+        * "partitions in a partition".
+        */
+       return 0;
+}
+
 UCLASS_DRIVER(blk) = {
        .id             = UCLASS_BLK,
        .name           = "blk",
@@ -821,6 +835,7 @@ U_BOOT_DRIVER(blk_partition) = {
 
 UCLASS_DRIVER(partition) = {
        .id             = UCLASS_PARTITION,
+       .post_probe     = blk_part_post_probe,
        .per_device_plat_auto   = sizeof(struct disk_part),
        .name           = "partition",
 };
-- 
2.33.0