2 files changed, 77 insertions, 6 deletions

diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 975318e5f2..49e23a0a4b 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -619,13 +619,61 @@ static int i2c_child_post_bind(struct udevice *dev)
 #endif
 }
 
+struct i2c_priv {
+	int max_id;
+};
+
+static int i2c_post_bind(struct udevice *dev)
+{
+	struct uclass *class = dev->uclass;
+	struct i2c_priv *priv = class->priv;
+	int ret = 0;
+
+	/* Just for sure */
+	if (!priv)
+		return -ENOMEM;
+
+	debug("%s: %s, req_seq=%d\n", __func__, dev->name, dev->req_seq);
+
+	/* if there is no alias ID, use the first free */
+	if (dev->req_seq == -1)
+		dev->req_seq = ++priv->max_id;
+
+	debug("%s: %s, new req_seq=%d\n", __func__, dev->name, dev->req_seq);
+
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
+	ret = dm_scan_fdt_dev(dev);
+#endif
+	return ret;
+}
+
+int i2c_uclass_init(struct uclass *class)
+{
+	struct i2c_priv *priv = class->priv;
+
+	/* Just for sure */
+	if (!priv)
+		return -ENOMEM;
+
+	/* Get the last allocated alias. */
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+	priv->max_id = dev_read_alias_highest_id("i2c");
+#else
+	priv->max_id = -1;
+#endif
+
+	debug("%s: highest alias id is %d\n", __func__, priv->max_id);
+
+	return 0;
+}
+
 UCLASS_DRIVER(i2c) = {
 	.id		= UCLASS_I2C,
 	.name		= "i2c",
 	.flags		= DM_UC_FLAG_SEQ_ALIAS,
-#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
-	.post_bind	= dm_scan_fdt_dev,
-#endif
+	.post_bind	= i2c_post_bind,
+	.init		= i2c_uclass_init,
+	.priv_auto_alloc_size = sizeof(struct i2c_priv),
 	.post_probe	= i2c_post_probe,
 	.per_device_auto_alloc_size = sizeof(struct dm_i2c_bus),
 	.per_child_platdata_auto_alloc_size = sizeof(struct dm_i2c_chip),
diff --git a/drivers/i2c/muxes/i2c-mux-uclass.c b/drivers/i2c/muxes/i2c-mux-uclass.c
index a680ee1762..8b1149997a 100644
--- a/drivers/i2c/muxes/i2c-mux-uclass.c
+++ b/drivers/i2c/muxes/i2c-mux-uclass.c
@@ -59,11 +59,34 @@ static int i2c_mux_post_bind(struct udevice *mux)
 	dev_for_each_subnode(node, mux) {
 		struct udevice *dev;
 		const char *name;
+		const char *arrow = "->";
+		char *full_name;
+		int parent_name_len, arrow_len, mux_name_len, name_len;
 
 		name = ofnode_get_name(node);
-		ret = device_bind_driver_to_node(mux, "i2c_mux_bus_drv", name,
-						 node, &dev);
-		debug("   - bind ret=%d, %s\n", ret, dev ? dev->name : NULL);
+
+		/* Calculate lenghts of strings */
+		parent_name_len = strlen(mux->parent->name);
+		arrow_len = strlen(arrow);
+		mux_name_len = strlen(mux->name);
+		name_len = strlen(name);
+
+		full_name = calloc(1, parent_name_len + arrow_len +
+				   mux_name_len + arrow_len + name_len + 1);
+		if (!full_name)
+			return -ENOMEM;
+
+		/* Compose bus name */
+		strcat(full_name, mux->parent->name);
+		strcat(full_name, arrow);
+		strcat(full_name, mux->name);
+		strcat(full_name, arrow);
+		strcat(full_name, name);
+
+		ret = device_bind_driver_to_node(mux, "i2c_mux_bus_drv",
+						 full_name, node, &dev);
+		debug("   - bind ret=%d, %s, req_seq %d\n", ret,
+		      dev ? dev->name : NULL, dev->req_seq);
 		if (ret)
 			return ret;
 	}