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/*
* Header with function prototypes to help device tree manipulation using
* libfdt. It also provides functions to read entries from device tree proc
* interface.
*
* Copyright 2008 IBM Corporation.
* Authors: Jerone Young <jyoung5@us.ibm.com>
* Hollis Blanchard <hollisb@us.ibm.com>
*
* This work is licensed under the GNU GPL license version 2 or later.
*
*/
#ifndef __DEVICE_TREE_H__
#define __DEVICE_TREE_H__
void *create_device_tree(int *sizep);
void *load_device_tree(const char *filename_path, int *sizep);
int qemu_fdt_setprop(void *fdt, const char *node_path,
const char *property, const void *val, int size);
int qemu_fdt_setprop_cell(void *fdt, const char *node_path,
const char *property, uint32_t val);
int qemu_fdt_setprop_u64(void *fdt, const char *node_path,
const char *property, uint64_t val);
int qemu_fdt_setprop_string(void *fdt, const char *node_path,
const char *property, const char *string);
int qemu_fdt_setprop_phandle(void *fdt, const char *node_path,
const char *property,
const char *target_node_path);
const void *qemu_fdt_getprop(void *fdt, const char *node_path,
const char *property, int *lenp);
uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path,
const char *property);
uint32_t qemu_fdt_get_phandle(void *fdt, const char *path);
uint32_t qemu_fdt_alloc_phandle(void *fdt);
int qemu_fdt_nop_node(void *fdt, const char *node_path);
int qemu_fdt_add_subnode(void *fdt, const char *name);
#define qemu_fdt_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_fdt_setprop(fdt, node_path, property, qdt_tmp, \
sizeof(qdt_tmp)); \
} while (0)
void qemu_fdt_dumpdtb(void *fdt, int size);
/**
* qemu_fdt_setprop_sized_cells_from_array:
* @fdt: device tree blob
* @node_path: node to set property on
* @property: property to set
* @numvalues: number of values
* @values: array of number-of-cells, value pairs
*
* Set the specified property on the specified node in the device tree
* to be an array of cells. The values of the cells are specified via
* the values list, which alternates between "number of cells used by
* this value" and "value".
* number-of-cells must be either 1 or 2 (other values will result in
* an error being returned). If a value is too large to fit in the
* number of cells specified for it, an error is returned.
*
* This function is useful because device tree nodes often have cell arrays
* which are either lists of addresses or lists of address,size tuples, but
* the number of cells used for each element vary depending on the
* #address-cells and #size-cells properties of their parent node.
* If you know all your cell elements are one cell wide you can use the
* simpler qemu_fdt_setprop_cells(). If you're not setting up the
* array programmatically, qemu_fdt_setprop_sized_cells may be more
* convenient.
*
* Return value: 0 on success, <0 on error.
*/
int qemu_fdt_setprop_sized_cells_from_array(void *fdt,
const char *node_path,
const char *property,
int numvalues,
uint64_t *values);
/**
* qemu_fdt_setprop_sized_cells:
* @fdt: device tree blob
* @node_path: node to set property on
* @property: property to set
* @...: list of number-of-cells, value pairs
*
* Set the specified property on the specified node in the device tree
* to be an array of cells. The values of the cells are specified via
* the variable arguments, which alternates between "number of cells
* used by this value" and "value".
*
* This is a convenience wrapper for the function
* qemu_fdt_setprop_sized_cells_from_array().
*
* Return value: 0 on success, <0 on error.
*/
#define qemu_fdt_setprop_sized_cells(fdt, node_path, property, ...) \
({ \
uint64_t qdt_tmp[] = { __VA_ARGS__ }; \
qemu_fdt_setprop_sized_cells_from_array(fdt, node_path, \
property, \
ARRAY_SIZE(qdt_tmp) / 2, \
qdt_tmp); \
})
#endif /* __DEVICE_TREE_H__ */
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