dt: add helpers for multi-cell adds

We have device tree helpers that allow us to create single cell (u32)
wide properties. However, when creating properties that contain an array of
cells, we need to jump through hoops, manually passing in an array with
converted endianness.

To ease the pain of this, create a generic macro helper that allows us
to pass the cells as arguments.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@petalogix.com>

diff --git a/device_tree.h b/device_tree.h
index 4378685b7a9ce3f658a7eeaa4cbad9058fbf33c7..1e671e25066f3d4df91617c0b7ac8607230467db 100644 (file)
--- a/device_tree.h
+++ b/device_tree.h
@@ -25,4 +25,16 @@ int qemu_devtree_setprop_string(void *fdt, const char *node_path,
 int qemu_devtree_nop_node(void *fdt, const char *node_path);
 int qemu_devtree_add_subnode(void *fdt, const char *name);
 
+#define qemu_devtree_setprop_cells(fdt, node_path, property, ...)             \
+    do {                                                                      \
+        uint32_t qdt_tmp[] = { __VA_ARGS__ };                                 \
+        int i;                                                                \
+                                                                              \
+        for (i = 0; i < ARRAY_SIZE(qdt_tmp); i++) {                           \
+            qdt_tmp[i] = cpu_to_be32(qdt_tmp[i]);                             \
+        }                                                                     \
+        qemu_devtree_setprop(fdt, node_path, property, qdt_tmp,               \
+                             sizeof(qdt_tmp));                                \
+    } while (0)
+
 #endif /* __DEVICE_TREE_H__ */