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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>
This commit is contained in:
Alexander Graf 2012-05-17 12:47:57 +02:00
parent c640d08834
commit 7ae2291e8e
1 changed files with 12 additions and 0 deletions
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12
device_tree.h
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@ -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__ */