7ae2291e8e
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>
41 lines
1.8 KiB
C
41 lines
1.8 KiB
C
/*
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* Header with function prototypes to help device tree manipulation using
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* libfdt. It also provides functions to read entries from device tree proc
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* interface.
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*
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* Copyright 2008 IBM Corporation.
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* Authors: Jerone Young <jyoung5@us.ibm.com>
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* Hollis Blanchard <hollisb@us.ibm.com>
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*
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* This work is licensed under the GNU GPL license version 2 or later.
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*
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*/
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#ifndef __DEVICE_TREE_H__
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#define __DEVICE_TREE_H__
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void *load_device_tree(const char *filename_path, int *sizep);
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int qemu_devtree_setprop(void *fdt, const char *node_path,
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const char *property, void *val_array, int size);
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int qemu_devtree_setprop_cell(void *fdt, const char *node_path,
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const char *property, uint32_t val);
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int qemu_devtree_setprop_string(void *fdt, const char *node_path,
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const char *property, const char *string);
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int qemu_devtree_nop_node(void *fdt, const char *node_path);
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int qemu_devtree_add_subnode(void *fdt, const char *name);
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#define qemu_devtree_setprop_cells(fdt, node_path, property, ...) \
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do { \
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uint32_t qdt_tmp[] = { __VA_ARGS__ }; \
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int i; \
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\
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for (i = 0; i < ARRAY_SIZE(qdt_tmp); i++) { \
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qdt_tmp[i] = cpu_to_be32(qdt_tmp[i]); \
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} \
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qemu_devtree_setprop(fdt, node_path, property, qdt_tmp, \
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sizeof(qdt_tmp)); \
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} while (0)
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#endif /* __DEVICE_TREE_H__ */
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