[PATCH 3/3] fixup! sandbox: add support to pass dtb to barebox

[Marc Kleine-Budde <mkl@pengutronix.de>]

This patch will generate a oftree on the fly, if no dtb is specified on the cmd
line.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 arch/sandbox/board/dtb.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/arch/sandbox/board/dtb.c b/arch/sandbox/board/dtb.c
index 9d4210164e01..708eca903a38 100644
--- a/arch/sandbox/board/dtb.c
+++ b/arch/sandbox/board/dtb.c
@@ -38,15 +38,25 @@ int barebox_register_dtb(const void *new_dtb)
 static int of_sandbox_init(void)
 {
 	struct device_node *root;
+	int ret;
 
-	if (!dtb)
-		return 0;
+	if (dtb) {
+		root = of_unflatten_dtb(dtb);
+	} else {
+		root = of_new_node(NULL, NULL);
+				
+		ret = of_property_write_u32(root, "#address-cells", 2);
+		if (ret)
+			return ret;
 
-	root = of_unflatten_dtb(dtb);
-	if (IS_ERR(root)) {
-		return PTR_ERR(root);
+		ret = of_property_write_u32(root, "#size-cells", 1);
+		if (ret)
+			return ret;
 	}
 
+	if (IS_ERR(root))
+		return PTR_ERR(root);
+
 	of_set_root_node(root);
 	of_fix_tree(root);
 	if (IS_ENABLED(CONFIG_OFDEVICE))
-- 
2.1.4


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