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1 /*
2  * Definitions for building a device tree by calling into the
3  * Open Firmware PROM.
4  *
5  * Copyright (C) 2010  Andres Salomon <dilinger@queued.net>
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version
10  * 2 of the License, or (at your option) any later version.
11  */
12 
13 #ifndef _LINUX_OF_PDT_H
14 #define _LINUX_OF_PDT_H
15 
16 /* overridable operations for calling into the PROM */
17 struct of_pdt_ops {
18 	/*
19 	 * buf should be 32 bytes; return 0 on success.
20 	 * If prev is NULL, the first property will be returned.
21 	 */
22 	int (*nextprop)(phandle node, char *prev, char *buf);
23 
24 	/* for both functions, return proplen on success; -1 on error */
25 	int (*getproplen)(phandle node, const char *prop);
26 	int (*getproperty)(phandle node, const char *prop, char *buf,
27 			int bufsize);
28 
29 	/* phandles are 0 if no child or sibling exists */
30 	phandle (*getchild)(phandle parent);
31 	phandle (*getsibling)(phandle node);
32 
33 	/* return 0 on success; fill in 'len' with number of bytes in path */
34 	int (*pkg2path)(phandle node, char *buf, const int buflen, int *len);
35 };
36 
37 extern void *prom_early_alloc(unsigned long size);
38 
39 /* for building the device tree */
40 extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops);
41 
42 extern void (*of_pdt_build_more)(struct device_node *dp,
43 		struct device_node ***nextp);
44 
45 #endif /* _LINUX_OF_PDT_H */
46