diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c
index bcc14a684be..e82789f4a38 100644
--- a/drivers/block/blk-uclass.c
+++ b/drivers/block/blk-uclass.c
@@ -444,53 +444,70 @@ int blk_get_device(int uclass_id, int devnum, struct udevice **devp)
 	return device_probe(*devp);
 }
 
-unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start,
-			lbaint_t blkcnt, void *buffer)
+long blk_read(struct udevice *dev, lbaint_t start, lbaint_t blkcnt, void *buf)
 {
-	struct udevice *dev = block_dev->bdev;
+	struct blk_desc *desc = dev_get_uclass_plat(dev);
 	const struct blk_ops *ops = blk_get_ops(dev);
 	ulong blks_read;
 
 	if (!ops->read)
 		return -ENOSYS;
 
-	if (blkcache_read(block_dev->uclass_id, block_dev->devnum,
-			  start, blkcnt, block_dev->blksz, buffer))
+	if (blkcache_read(desc->uclass_id, desc->devnum,
+			  start, blkcnt, desc->blksz, buf))
 		return blkcnt;
-	blks_read = ops->read(dev, start, blkcnt, buffer);
+	blks_read = ops->read(dev, start, blkcnt, buf);
 	if (blks_read == blkcnt)
-		blkcache_fill(block_dev->uclass_id, block_dev->devnum,
-			      start, blkcnt, block_dev->blksz, buffer);
+		blkcache_fill(desc->uclass_id, desc->devnum, start, blkcnt,
+			      desc->blksz, buf);
 
 	return blks_read;
 }
 
-unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
-			 lbaint_t blkcnt, const void *buffer)
+long blk_write(struct udevice *dev, lbaint_t start, lbaint_t blkcnt,
+	       const void *buf)
 {
-	struct udevice *dev = block_dev->bdev;
+	struct blk_desc *desc = dev_get_uclass_plat(dev);
 	const struct blk_ops *ops = blk_get_ops(dev);
 
 	if (!ops->write)
 		return -ENOSYS;
 
-	blkcache_invalidate(block_dev->uclass_id, block_dev->devnum);
-	return ops->write(dev, start, blkcnt, buffer);
+	blkcache_invalidate(desc->uclass_id, desc->devnum);
+
+	return ops->write(dev, start, blkcnt, buf);
 }
 
-unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
-			 lbaint_t blkcnt)
+long blk_erase(struct udevice *dev, lbaint_t start, lbaint_t blkcnt)
 {
-	struct udevice *dev = block_dev->bdev;
+	struct blk_desc *desc = dev_get_uclass_plat(dev);
 	const struct blk_ops *ops = blk_get_ops(dev);
 
 	if (!ops->erase)
 		return -ENOSYS;
 
-	blkcache_invalidate(block_dev->uclass_id, block_dev->devnum);
+	blkcache_invalidate(desc->uclass_id, desc->devnum);
+
 	return ops->erase(dev, start, blkcnt);
 }
 
+ulong blk_dread(struct blk_desc *desc, lbaint_t start, lbaint_t blkcnt,
+		void *buffer)
+{
+	return blk_read(desc->bdev, start, blkcnt, buffer);
+}
+
+ulong blk_dwrite(struct blk_desc *desc, lbaint_t start, lbaint_t blkcnt,
+		 const void *buffer)
+{
+	return blk_write(desc->bdev, start, blkcnt, buffer);
+}
+
+ulong blk_derase(struct blk_desc *desc, lbaint_t start, lbaint_t blkcnt)
+{
+	return blk_erase(desc->bdev, start, blkcnt);
+}
+
 int blk_get_from_parent(struct udevice *parent, struct udevice **devp)
 {
 	struct udevice *dev;
diff --git a/include/blk.h b/include/blk.h
index d3ab9a10b96..e854166edb9 100644
--- a/include/blk.h
+++ b/include/blk.h
@@ -273,6 +273,43 @@ unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
 unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
 			 lbaint_t blkcnt);
 
+/**
+ * blk_read() - Read from a block device
+ *
+ * @dev: Device to read from
+ * @start: Start block for the read
+ * @blkcnt: Number of blocks to read
+ * @buf: Place to put the data
+ * @return number of blocks read (which may be less than @blkcnt),
+ * or -ve on error. This never returns 0 unless @blkcnt is 0
+ */
+long blk_read(struct udevice *dev, lbaint_t start, lbaint_t blkcnt,
+	      void *buffer);
+
+/**
+ * blk_write() - Write to a block device
+ *
+ * @dev: Device to write to
+ * @start: Start block for the write
+ * @blkcnt: Number of blocks to write
+ * @buf: Data to write
+ * @return number of blocks written (which may be less than @blkcnt),
+ * or -ve on error. This never returns 0 unless @blkcnt is 0
+ */
+long blk_write(struct udevice *dev, lbaint_t start, lbaint_t blkcnt,
+	       const void *buffer);
+
+/**
+ * blk_erase() - Erase part of a block device
+ *
+ * @dev: Device to erase
+ * @start: Start block for the erase
+ * @blkcnt: Number of blocks to erase
+ * @return number of blocks erased (which may be less than @blkcnt),
+ * or -ve on error. This never returns 0 unless @blkcnt is 0
+ */
+long blk_erase(struct udevice *dev, lbaint_t start, lbaint_t blkcnt);
+
 /**
  * blk_find_device() - Find a block device
  *
@@ -428,7 +465,7 @@ const char *blk_get_devtype(struct udevice *dev);
 
 /**
  * blk_get_by_device() - Get the block device descriptor for the given device
- * @dev:	Instance of a storage device
+ * @dev:	Instance of a storage device (the parent of the block device)
  *
  * Return: With block device descriptor on success , NULL if there is no such
  *	   block device.
diff --git a/test/dm/usb.c b/test/dm/usb.c
index 5d6ceefce0b..445b21a560b 100644
--- a/test/dm/usb.c
+++ b/test/dm/usb.c
@@ -43,19 +43,24 @@ DM_TEST(dm_test_usb_base, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
  */
 static int dm_test_usb_flash(struct unit_test_state *uts)
 {
-	struct udevice *dev;
-	struct blk_desc *dev_desc;
+	struct blk_desc *dev_desc, *chk;
+	struct udevice *dev, *blk;
 	char cmp[1024];
 
 	state_set_skip_delays(true);
 	ut_assertok(usb_init());
 	ut_assertok(uclass_get_device(UCLASS_MASS_STORAGE, 0, &dev));
 	ut_assertok(blk_get_device_by_str("usb", "0", &dev_desc));
+	chk = blk_get_by_device(dev);
+	ut_asserteq_ptr(chk, dev_desc);
+
+	ut_assertok(device_find_first_child_by_uclass(dev, UCLASS_BLK, &blk));
+	ut_asserteq_ptr(chk, blk_get_by_device(dev));
 
 	/* Read a few blocks and look for the string we expect */
 	ut_asserteq(512, dev_desc->blksz);
 	memset(cmp, '\0', sizeof(cmp));
-	ut_asserteq(2, blk_dread(dev_desc, 0, 2, cmp));
+	ut_asserteq(2, blk_read(blk, 0, 2, cmp));
 	ut_assertok(strcmp(cmp, "this is a test"));
 	ut_assertok(usb_stop());