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/* SPDX-License-Identifier: GPL-2.0+ */
* Definitions for building a device tree by calling into the
* Open Firmware PROM.
* Copyright (C) 2010 Andres Salomon <>
#ifndef _LINUX_OF_PDT_H
#define _LINUX_OF_PDT_H
/* overridable operations for calling into the PROM */
struct of_pdt_ops {
* buf should be 32 bytes; return 0 on success.
* If prev is NULL, the first property will be returned.
int (*nextprop)(phandle node, char *prev, char *buf);
/* for both functions, return proplen on success; -1 on error */
int (*getproplen)(phandle node, const char *prop);
int (*getproperty)(phandle node, const char *prop, char *buf,
int bufsize);
/* phandles are 0 if no child or sibling exists */
phandle (*getchild)(phandle parent);
phandle (*getsibling)(phandle node);
/* return 0 on success; fill in 'len' with number of bytes in path */
int (*pkg2path)(phandle node, char *buf, const int buflen, int *len);
extern void *prom_early_alloc(unsigned long size);
/* for building the device tree */
extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops);
extern void (*of_pdt_build_more)(struct device_node *dp);
#endif /* _LINUX_OF_PDT_H */