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1/* SPDX-License-Identifier: GPL-2.0+ */2/*3 * Definitions for building a device tree by calling into the4 * Open Firmware PROM.5 *6 * Copyright (C) 2010 Andres Salomon <dilinger@queued.net>7 */8 9#ifndef _LINUX_OF_PDT_H10#define _LINUX_OF_PDT_H11 12/* overridable operations for calling into the PROM */13struct of_pdt_ops {14 /*15 * buf should be 32 bytes; return 0 on success.16 * If prev is NULL, the first property will be returned.17 */18 int (*nextprop)(phandle node, char *prev, char *buf);19 20 /* for both functions, return proplen on success; -1 on error */21 int (*getproplen)(phandle node, const char *prop);22 int (*getproperty)(phandle node, const char *prop, char *buf,23 int bufsize);24 25 /* phandles are 0 if no child or sibling exists */26 phandle (*getchild)(phandle parent);27 phandle (*getsibling)(phandle node);28 29 /* return 0 on success; fill in 'len' with number of bytes in path */30 int (*pkg2path)(phandle node, char *buf, const int buflen, int *len);31};32 33extern void *prom_early_alloc(unsigned long size);34 35/* for building the device tree */36extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops);37 38#endif /* _LINUX_OF_PDT_H */39