From: Michael Olbrich <m.olbrich@xxxxxxxxxxxxxx>
Qemu adds 'virtio,mmio' nodes to the device tree. Before passing it to the
bootloader or the Linux kernel. This fixup handler copies these nodes to
the new device tree.
v2:
- move from general to platform specific init
Signed-off-by: Michael Olbrich <m.olbrich@xxxxxxxxxxxxxx>
Signed-off-by: Rouven Czerwinski <r.czerwinski@xxxxxxxxxxxxxx>
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
---
arch/arm/boards/vexpress/init.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/arch/arm/boards/vexpress/init.c b/arch/arm/boards/vexpress/init.c
index 1bbc8c347638..946385393f44 100644
--- a/arch/arm/boards/vexpress/init.c
+++ b/arch/arm/boards/vexpress/init.c
@@ -45,3 +45,32 @@ static int vexpress_core_init(void)
return 0;
}
postcore_initcall(vexpress_core_init);
+
+static int of_fixup_virtio_mmio(struct device_node *root, void *unused)
+{
+ struct device_node *barebox_root, *np, *parent;
+
+ barebox_root = of_get_root_node();
+ if (root == barebox_root)
+ return 0;
+
+ for_each_compatible_node_from(np, barebox_root, NULL, "virtio,mmio") {
+ if (of_get_parent(np) == barebox_root)
+ parent = root;
+ else
+ parent = of_find_node_by_path_from(root,
+ of_get_parent(np)->full_name);
+ if (!parent)
+ return -EINVAL;
+
+ of_copy_node(parent, np);
+ }
+
+ return 0;
+}
+
+static int of_register_virtio_mmio_fixup(void)
+{
+ return of_register_fixup(of_fixup_virtio_mmio, NULL);
+}
+late_initcall(of_register_virtio_mmio_fixup);
--
2.11.0
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