fdt_support: Add fdt_delete_disabled_nodes() and use in Turris MOX

Move Turris MOX specific remove_disabled_nodes() to fdt_support with
name fdt_delete_disabled_nodes(), so that others can potentially use it.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>

board/CZ.NIC/turris_mox/turris_mox.c

@@ -749,24 +749,6 @@ static int setup_switch(void *blob, int id)
 	return 0;
 }
 
-static int remove_disabled_nodes(void *blob)
-{
-	while (1) {
-		int res, offset;
-
-		offset = fdt_node_offset_by_prop_value(blob, -1, "status",
-						       "disabled", 9);
-		if (offset < 0)
-			break;
-
-		res = fdt_del_node(blob, offset);
-		if (res < 0)
-			return res;
-	}
-
-	return 0;
-}
-
 int ft_board_setup(void *blob, struct bd_info *bd)
 {
 	int res;
@@ -872,7 +854,7 @@ int ft_board_setup(void *blob, struct bd_info *bd)
 	fdt_fixup_ethernet(blob);
 
 	/* Finally remove disabled nodes, as per Rob Herring's request. */
-	remove_disabled_nodes(blob);
+	fdt_delete_disabled_nodes(blob);
 
 	return 0;
 }

common/fdt_support.c

@@ -695,6 +695,29 @@ int fdt_shrink_to_minimum(void *blob, uint extrasize)
 	return actualsize;
 }
 
+/**
+ * fdt_delete_disabled_nodes: Delete all nodes with status == "disabled"
+ *
+ * @blob: ptr to device tree
+ */
+int fdt_delete_disabled_nodes(void *blob)
+{
+	while (1) {
+		int ret, offset;
+
+		offset = fdt_node_offset_by_prop_value(blob, -1, "status",
+						       "disabled", 9);
+		if (offset < 0)
+			break;
+
+		ret = fdt_del_node(blob, offset);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
 #ifdef CONFIG_PCI
 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
 

include/fdt_support.h

@@ -228,6 +228,8 @@ void set_working_fdt_addr(ulong addr);
 int fdt_shrink_to_minimum(void *blob, uint extrasize);
 int fdt_increase_size(void *fdt, int add_len);
 
+int fdt_delete_disabled_nodes(void *blob);
+
 int fdt_fixup_nor_flash_size(void *blob);
 
 struct node_info;