diff --git a/fs/ext4l/ext4_uboot.h b/fs/ext4l/ext4_uboot.h
index 24402f21790..2ca7f018bc8 100644
--- a/fs/ext4l/ext4_uboot.h
+++ b/fs/ext4l/ext4_uboot.h
@@ -263,8 +263,18 @@ void ext4l_msg_init(void);
 void ext4l_print_msgs(void);
 void ext4l_record_msg(const char *msg, int len);
 
-/* ext4l interface functions (interface.c) */
-struct blk_desc *ext4l_get_blk_dev(void);
+/**
+ * ext4l_get_blk() - Get the current block device
+ *
+ * Return: Block udevice, or NULL if not mounted
+ */
+struct udevice *ext4l_get_blk(void);
+
+/**
+ * ext4l_get_partition() - Get the current partition info
+ *
+ * Return: Partition info pointer, or NULL if not mounted
+ */
 struct disk_partition *ext4l_get_partition(void);
 
 #endif /* __EXT4_UBOOT_H__ */
diff --git a/fs/ext4l/interface.c b/fs/ext4l/interface.c
index d854c310be3..893f71c1f1c 100644
--- a/fs/ext4l/interface.c
+++ b/fs/ext4l/interface.c
@@ -31,7 +31,7 @@ static struct blk_desc *ext4l_dev_desc;
 static struct disk_partition ext4l_part;
 
 /* Global block device tracking for buffer I/O */
-static struct blk_desc *ext4l_blk_dev;
+static struct udevice *ext4l_blk_dev;
 static struct disk_partition ext4l_partition;
 static int ext4l_mounted;
 
@@ -42,11 +42,11 @@ static int ext4l_open_dirs;
 static struct super_block *ext4l_sb;
 
 /**
- * ext4l_get_blk_dev() - Get the current block device
+ * ext4l_get_blk() - Get the current block device
  *
  * Return: Block device descriptor or NULL if not mounted
  */
-struct blk_desc *ext4l_get_blk_dev(void)
+struct udevice *ext4l_get_blk(void)
 {
 	if (!ext4l_mounted)
 		return NULL;
@@ -123,7 +123,8 @@ int ext4l_statfs(struct fs_statfs *stats)
  * @blk_dev: Block device descriptor
  * @partition: Partition info (can be NULL for whole disk)
  */
-void ext4l_set_blk_dev(struct blk_desc *blk_dev, struct disk_partition *partition)
+void ext4l_set_blk_dev(struct udevice *blk_dev,
+		       struct disk_partition *partition)
 {
 	ext4l_blk_dev = blk_dev;
 	if (partition)
@@ -408,7 +409,7 @@ int ext4l_probe(struct blk_desc *fs_dev_desc,
 		memcpy(&ext4l_part, fs_partition, sizeof(ext4l_part));
 
 	/* Set block device for buffer I/O */
-	ext4l_set_blk_dev(fs_dev_desc, fs_partition);
+	ext4l_set_blk_dev(fs_dev_desc->bdev, fs_partition);
 
 	/*
 	 * Test if device supports writes by writing back the same data.
diff --git a/fs/ext4l/support.c b/fs/ext4l/support.c
index 4025d291fec..cd7c0b4b802 100644
--- a/fs/ext4l/support.c
+++ b/fs/ext4l/support.c
@@ -10,6 +10,7 @@
  */
 
 #include <blk.h>
+#include <dm.h>
 #include <membuf.h>
 #include <part.h>
 #include <malloc.h>
@@ -500,26 +501,28 @@ void free_buffer_head(struct buffer_head *bh)
  */
 int ext4l_read_block(sector_t block, size_t size, void *buffer)
 {
-	struct blk_desc *blk_dev;
 	struct disk_partition *part;
-	lbaint_t sector;
-	lbaint_t sector_count;
-	unsigned long n;
+	lbaint_t sector, count;
+	struct blk_desc *desc;
+	struct udevice *blk;
+	ulong n;
 
-	blk_dev = ext4l_get_blk_dev();
+	blk = ext4l_get_blk();
 	part = ext4l_get_partition();
-	if (!blk_dev)
+	if (!blk)
 		return -EIO;
 
+	desc = dev_get_uclass_plat(blk);
+
 	/* Convert block to sector */
-	sector = (block * size) / blk_dev->blksz + part->start;
-	sector_count = size / blk_dev->blksz;
+	sector = (block * size) / desc->blksz + part->start;
+	count = size / desc->blksz;
 
-	if (sector_count == 0)
-		sector_count = 1;
+	if (count == 0)
+		count = 1;
 
-	n = blk_dread(blk_dev, sector, sector_count, buffer);
-	if (n != sector_count)
+	n = blk_read(blk, sector, count, buffer);
+	if (n != count)
 		return -EIO;
 
 	return 0;
@@ -534,26 +537,28 @@ int ext4l_read_block(sector_t block, size_t size, void *buffer)
  */
 int ext4l_write_block(sector_t block, size_t size, void *buffer)
 {
-	struct blk_desc *blk_dev;
 	struct disk_partition *part;
-	lbaint_t sector;
-	lbaint_t sector_count;
-	unsigned long n;
+	lbaint_t sector, count;
+	struct blk_desc *desc;
+	struct udevice *blk;
+	ulong n;
 
-	blk_dev = ext4l_get_blk_dev();
+	blk = ext4l_get_blk();
 	part = ext4l_get_partition();
-	if (!blk_dev)
+	if (!blk)
 		return -EIO;
 
+	desc = dev_get_uclass_plat(blk);
+
 	/* Convert block to sector */
-	sector = (block * size) / blk_dev->blksz + part->start;
-	sector_count = size / blk_dev->blksz;
+	sector = (block * size) / desc->blksz + part->start;
+	count = size / desc->blksz;
 
-	if (sector_count == 0)
-		sector_count = 1;
+	if (count == 0)
+		count = 1;
 
-	n = blk_dwrite(blk_dev, sector, sector_count, buffer);
-	if (n != sector_count)
+	n = blk_write(blk, sector, count, buffer);
+	if (n != count)
 		return -EIO;
 
 	return 0;