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

Message ID 20211004034430.41355-10-takahiro.akashi@linaro.org
State New
Headers show
Series efi_loader: more tightly integrate UEFI disks to device model | expand

Commit Message

AKASHI Takahiro Oct. 4, 2021, 3:44 a.m. UTC 
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.akashi@linaro.org>

---
 drivers/block/blk-uclass.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

-- 
2.33.0
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Patch

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",
 };